LST (Low Stress Training) Pruning: What does this technique consist of?

Low-stress pruning, commonly known as LST (Low Stress Training) is a training technique for cannabis plants that seeks to improve their development without subjecting them to a high level of stress. This method allows you to shape the growth of the plants, obtaining better results in light distribution, bud production and the quality of the final harvest. Through this technique, it is possible to maximize yield without seriously damaging the plant structure, making it ideal for both novice and expert growers.

If you are a grower interested in optimizing your harvest and improving your gardening skills, LST pruning could become your best ally. Join us on this journey through the fundamentals and secrets of this innovative and effective pruning technique, because from Grow Industry, online grow store trustworthy, we tell you everything you need to know about it.

What is LST Pruning?

LST Pruning, which stands for "Low Stress Training" in English, is a pruning technique used in cultivation that focuses on training and gentle manipulation of plants to achieve optimal growth and efficient light distribution. Unlike the other pruning techniques which can be more aggressive, such as apical pruning, which involves the removal of parts of the plant, LST is based on bending and tying branches to redirect its growth in a controlled manner.

The fundamental principle behind the LST pruning technique is based on phototropy, which is the response of plants to light. Plants have a natural tendency to orient their branches towards the light source to maximize the capture of light energy. By carefully bending the branches and placing them in a horizontal or lower position, the growth of new shoots and side branches can be stimulated. This results in a bushier and wider plant, rather than tall and slender, which improves light absorption in all parts of the plant.

The LST pruning process involves using wires, ropes, or other soft holding devices to bend the plant's branches so that they are parallel to the substrate or growing surface. As the plant grows, these bent branches will fill with buds, significantly increasing overall flower production.

Why do low stress pruning (LST) on cannabis plants?

Improved light distribution

One of the greatest benefits of LST pruning It is its ability to improve the distribution of light throughout the entire plant. By bending and training the branches horizontally, the plant acquires a wider and lower shape, allowing light to penetrate more evenly in all parts. This prevents some branches from being in the shade, as often happens in vertically growing plants, and ensures that the leaves and lower branches receive enough light to carry out a optimal photosynthesis. With more evenly distributed light, the plant can grow more balanced and maximize its development potential.

In addition, uniform exposure to light increases the energy efficiency of the plant, which has a direct impact on the general health and vigor of its branches. Areas that were previously shaded can now actively contribute to growth, resulting in a greater number of sites for bud production and an increase in the quality of the final harvest.

Increase in bud production

The LST pruning It also promotes the creation of multiple flowering sites rather than relying on a single dominant apical shoot. This means that each bent branch becomes a potential site for flower formation, allowing the plant to produce a greater number of buds. Unlike other techniques, where production focuses on one or two main buds, with LST a more uniform plant with a greater number of buds is obtained. medium sized buds distributed throughout its structure.

This increase in flowering sites is especially beneficial for those seeking maximize the number of buds in their crops. By having more production points, the final harvest becomes more abundant and allows for a more uniform distribution of the plant's resources. This low-stress technique is therefore an excellent option for growers who want to maximize yield without compromising plant health.

Increase in harvest quality

By encouraging the development of multiple smaller buds instead of concentrating on one or two large ones, the LST pruning tends to improve the overall quality of the crop. These smaller buds, being more exposed and receiving a uniform distribution of nutrients and light, tend to be denser and contain a greater amount of trichomes, which are responsible for the power and aroma in . This technique, therefore, helps to improve both the cannabinoid content and the terpene profile.

The result is a higher quality harvest, where each bud has outstanding characteristics and a higher level of power and flavor. Growers seeking to optimize the quality of the final product find LST an ideal technique, as it allows them to obtain well-formed buds, with a higher concentration of resin and intense aromas.

Reduction of competition between branches

In plants that are not pruned, it is common for branches to compete with each other for light, which can lead to uneven growth and lower production in the lower branches. The LST pruning allows this competition to be minimized, by guaranteeing that all branches receive light equally and, therefore, have better conditions to fully develop. By eliminating this competition, each branch grows with the same strength and opportunity, producing buds more efficiently and homogeneously.

This technique not only allows a greater efficiency in the use of resources, but also facilitates the maintenance of the plant. By having more balanced growth, it is easier to observe and control the development of the branches, which contributes to more efficient management and, ultimately, a higher quality harvest.

What do you need to apply low stress pruning techniques (Low Stress Training)?

To carry out effective LST pruning, it is important to have certain tools and materials that facilitate the process and ensure good results. First of all, it is essential to have precise and clean pruning shears that allow the initial cuts to be made with precision, avoiding damaging the fibers of the plant. The scissors must be disinfected to avoid the risk of infections or diseases on the plant.

Another essential element is plant tape or soft wires, which will be used to keep the branches in the desired position. This material should be strong enough to support the weight of the branches, but also soft to avoid strangling or damaging them. Furthermore, it is recommended to use support stakes, especially if the plant is in an advanced growth phase and its branches are heavier.

Proper preparation of the environment is also key to the success of the LST. It is important to ensure that the plant receives adequate and uniform lighting throughout its structure to maximize the benefits of the technique. Likewise, the environment must be free of additional stress, with a constant supply of nutrients and an optimal level of humidity and temperature. With these elements, it is possible to guarantee an ideal environment for the plant to respond positively to training.

Finally, having a stable and clean work surface It makes the process much easier. Working in an organized place allows you to stay focused and perform each step with precision, minimizing errors and ensuring that each part of the plant undergoes the LST process correctly and effectively.

When to apply LST in the life cycle of plants?

The ideal time to apply the LST In cannabis plants it is during the early stages of growth, when the stems and branches are flexible and most receptive to manipulation. In general, the technique can be started from the third or fourth week of the plant's life, when it already has several branches and begins to develop vertically. At this age, the plant is still in a vigorous growth phase and is more resistant to handling.

It is advisable to continue with LST throughout the vegetative stage, since it is during this period when the plant focuses on developing its structure and producing strong branches. However, once the flowering phase begins, handling should be reduced, as the plant's focus shifts toward flower production and is more vulnerable to stress.

Step by Step Guide to Perform LST Pruning

Below is a step-by-step guide on how to perform this technique effectively:

Step 1: Select the Branches to Train

The first step in the LST (Low Stress Training) Pruning technique is to identify the branches you want to train. This step is crucial to ensure that the plant grows as desired and that the branches are efficiently exposed to light.

• Observe your Plant: Initially, observe your plant and evaluate its structure. Look for branches that are developing vertically upward and that are competing for light with other branches. These are the ideal branches for LST training.
• Select Flexible Branches: It is important to choose branches that are flexible and not too rigid. Flexible branches are easier to bend without breaking. If a branch is too stiff, it may not respond well to LST training.
• Prioritize the Higher Branches: In general, it is recommended to select the upper branches of the plant, since these tend to receive less light due to their position. By training these branches to the sides, a more uniform light distribution can be achieved throughout the plant.
• Plan Distribution: Visualize how you want the branches to grow and how the light will be distributed between them. This will help you make informed decisions about which branches to train and which direction to bend them.

Remember that LST Pruning is a technique that is performed gradually over time. It is not necessary to train all branches at once. With patience and attention to selecting the right branches, you will be ready to move on to the next step of the LST process.

Step 2: Gather the Tools

Before starting branch training, it is essential to have all the necessary tools gathered and ready. This will make the process easier and ensure that you can make the necessary adjustments efficiently. The tools and materials you will need include:

• Pruning Shears: They should be sharp and clean to make precise cuts when necessary during training.
• Ropes or Soft Wires: They are used to tie branches and guide their growth. Make sure they are soft and do not damage the branches.
• Tutors o Supports: They may be needed to keep branches in the desired position after bending. Make sure you have enough tutors on hand if you need them.
• Gardening Gloves: Gloves will protect your hands during the process and will also help maintain proper hygiene.
• Labels or Bookmarks: It is useful to label the branches you have trained and record the date you performed the process. This will help you keep track of the progress of each branch.
• Magnifying glass o Magnifying Glasses: In some cases, a magnifying glass or magnifying glasses may be helpful for making precise cuts and adjustments.
• Tool Disinfectant: Before and after making cuts on branches, it is important to disinfect your pruning shears to prevent the spread of diseases or infections.
• Water Container: You may need a container of water to moisten the ropes or wires before tying the branches.
• Paper and Pen: To take notes and record the changes you make to each branch.

Once you have gathered all of these tools and materials, you will be prepared to proceed with the branch training process using the LST Pruning technique effectively.

Step 3: Fold Carefully

Once you have selected the branches you want to train and have gathered all the necessary tools, it is time to begin the process of carefully bending the branches. The main objective of this step is to guide the growth of the branches horizontally or in the desired direction without causing damage or excessive stress to the plant. Follow these steps to carefully bend the branches:

• Identification of Flexion Points: Observe the plant and locate the points on the branches that are flexible enough to bend without breaking. These points are usually near the nodes where the branches join the main stem.
• Branch Holding: Carefully hold the selected branch near the bending point with one hand while supporting the main stem with the other hand to avoid putting additional pressure on the stem.
• Gradual Bending: Begin to gently bend the branch in the desired direction. Bending should be gradual and slow to prevent breakage or excessive stress. As you bend the branch, you can use rope or soft wire to tie it in its new position.
• Gradual Adjustments: Observe how the branch reacts to bending and make additional adjustments if necessary. The goal is for the branch to maintain its new position naturally.
• Avoid Damage: Pay attention to ensure that the branches are not broken or damaged during the bending process. If you notice that a branch is becoming too stressed or at risk of breaking, it is best to stop the process on that specific branch.
• Labeling and Registration: Label the branch you have folded and record the date you performed the process. This will help you keep track of the branches you have trained and their progress.

Remember that the key to LST Pruning is to apply low, controlled stress to the branches to guide their growth efficiently. This step is essential to achieve uniform light distribution and maximize bud production on the plant.

Step 4: Fix the Branches

Once you've carefully bent the branches in the desired direction, the next step is to make sure they hold their new position. This is achieved by gently but securely securing the branches to prevent them from straightening or moving again. Follow these steps to secure branches effectively:

• Bra Preparation: Before you begin, make sure you have soft, flexible fasteners on hand, such as garden rope or plastic-coated wire. These fasteners should be soft enough so as not to damage the branches or cut off the flow of nutrients.
• Careful Fastening: Start by gently holding the branch near the point where you bent it. Avoid over-tightening to avoid damaging the branch or restricting its growth.
• Secure Fixation: Use the fasteners to fix the branch in its new position. You can gently tie the branch around the main stem or to another part of the plant to keep it in place. Make sure the branch is firmly attached but not too tight.
• Uniform Spacing: Distribute the trained branches evenly around the plant to ensure even light exposure in all areas. This will help all parts of the plant receive the same amount of light and maximize bud production.
• Continuous Review: As the plant grows, it is important to regularly check trained branches and adjust fasteners if necessary. As the branches get stronger, you may need to loosen the fasteners to allow for proper growth.
• Labeling and Registration: Label the trained branches and keep track of the date you performed the pinning. This will help you track the progress and effectiveness of LST Pruning on your plant.

Proper fixation of branches is essential to maintain the desired plant shape and ensure optimal light exposure. This step contributes significantly to improving bud production and maximizing the benefits of the LST Pruning technique.

 Step 5: Observe and Adjust

After you have set the branches in the desired position, it is important to closely monitor how they are responding and growing. Constant observation will allow you to make adjustments to optimize training and ensure uniform light exposure. Follow these steps to observe and adjust trained branches:

• Observation Frequency: Take time every day or every few days to observe the trained branches and their growth. It is essential to maintain constant monitoring during the training period.
• Growth Assessment: Observe if the branches are growing in the desired direction and if they are moving away from the shadiest areas of the plant. Look for signs of branches that might need more training.
• Soft Settings: If you notice that any branches are straightening or not receiving enough light, make gentle adjustments. This may include re-bending a branch slightly or repositioning fasteners.
• Avoid Stress: Although the technique is called "Low Stress Training", it is important to avoid causing unnecessary stress to the plant. Make adjustments gently and gradually to avoid damaging branches.
• Change Log: Keep track of the adjustments you make and the dates you make them. This will help you track the effectiveness of the training and learn what works best for your plant.
• Observation continues: Observation and adjustments should continue throughout the entire flowering period of the plant. As the plant grows and develops new shoots, you may need to continue training the branches to maintain even light exposure.

Constant observation and gentle adjustments are critical to the success of the LST Pruning technique. This ensures that the branches are kept in the optimal position to receive light and maximize bud production without causing unnecessary stress to the plant.

Step 6: Continue Training

LST training is a continuous process throughout the plant life cycle. As the plant grows and develops new shoots, it is essential to continue training to ensure that all branches have adequate light exposure and that bud production is optimal. Follow these steps to continue LST training effectively:

• Regular Monitoring: Keep close track of plant growth and how trained branches respond. Take time regularly to observe any changes in branch orientation.
• Gradual Adjustments: As the plant grows, some branches will likely need adjustments to keep them in the desired position. Make these adjustments gently and gradually to avoid damaging the plant.
• New Training: As new shoots and side branches develop, consider training them using the same LST technique. This ensures that all parts of the plant have access to light and can develop high-quality buds.
• Maintain Uniformity: The goal is to maintain uniform light exposure across all parts of the plant. As you continue training, make sure there are no shadowy areas that could affect bud production.
• Settings Log: Keep track of the adjustments you make and the dates you make them. This will help you track the effectiveness of the training and learn what works best for your plant.
• Stress Control: Although it is called "Low Stress Training", it is important to avoid causing unnecessary stress to the plant. Make adjustments gently and take into account the overall health of the plant.

LST training should be a continuous process throughout the plant life cycle. This approach allows you to maximize bud production and ensure uniform light exposure, resulting in a higher quality harvest. Continuing LST training requires patience and constant attention to the plant.

Step 7: Patience and Follow-Up

Patience is essential in the LST training process, as the results may not be immediately evident, but become more evident over time. This step involves keeping constant monitoring of the plant and observing how it responds as it adapts to the training. Here are some key guidelines for patience and follow-through:

• Continuous Observation: Continue watching the plant as it grows and develops new shoots. Pay attention to the way the trained branches are oriented towards the light and how the buds are distributed.
• Progress Record: Keep track of changes in the plant over time. This may include regular photographs to document their development. The record will help you evaluate the effectiveness of the training.
• Gradual Adjustments: If necessary, make gradual adjustments to the orientation of the branches. This may involve raising or lowering branches to make sure they all have access to light.
• Stress Resistance: Make sure the plant is healthy and not experiencing excessive stress. LST training is called "Low Stress Training" because it should minimize stress for the plant.
• Production Monitoring: Observe the production of buds and how they develop on the trained branches. You should see an increase in bud production and quality as the training takes effect.
• Patience: Remember that LST training is a gradual process and may take time before results are evident. Patience is key to allowing the plant to adapt to training and maximize its performance.

The patience and follow-through step in LST training is essential for long-term success. By carefully observing the plant and making adjustments as necessary, you can ensure that it is optimized to produce high-quality buds. The reward for your patience will be an abundant and excellent harvest.

Is LST pruning effective in indoor plantations?

The LST pruning It is highly effective in indoor plantations due to space limitations and the need to maximize the use of available light. In a closed environment, where light only comes from a specific source, the LST allows this light to be distributed evenly, promoting balanced and efficient growth. Additionally, it helps optimize space horizontally, allowing each plant to develop multiple productive branches without competing for vertical light.

How to handle damaged branches during training

During the process of LST, it may happen that a branch breaks or shows signs of excessive stress. In these cases, it is essential to act quickly. The first thing is to use tape or soft wire to stabilize the branch and allow it to recover. In addition, it is advisable to apply healing products to protect the wound and reduce the risk of infection. With time, and proper care, damaged branches can recover without affecting growth.

Safety Precautions in Pruning LST (Low Stress Training)

Performing LST (Low Stress Training) Pruning is a safe practice, but it is important to follow some precautions to ensure the safety of the plant and the grower. Here are some key precautions to keep in mind:

• Hand Washing: Before touching the plant, be sure to wash your hands well. This will help prevent the transfer of dirt, oils, and germs to the plant.
• Sharp Tools: Use sharp and clean pruning tools to avoid damaging the plant. Clean cuts minimize stress on the plant and reduce the risk of infection.
• Tools Disinfection: Disinfect your tools before and after each use. This prevents the spread of diseases and pathogens from one plant to another.
• Smoothness in Movements: When bending the branches, make sure to do it gently and carefully. Avoid applying excessive pressure that could damage the branches.
• Do not force: Don't force the branches into one position. They should bend naturally and without excessive effort.
• Stress Control: Monitor the plant to make sure it is not experiencing excessive stress as a result of training. If you notice signs of severe stress, consider relieving tension in the branches.
• Respect for the Life Cycle: Perform LST Pruning at the right time according to the life cycle of the plant. Forcing training at inappropriate stages can damage the plant.
• Continuous Observation: After training, keep constant observation of the plant to make sure it is adapting healthily.
• Area Cleaning: Keep the growing area clean and organized. Avoid obstacles that could damage the plant or interfere with training.
• Eye and Hand Protection: In some cases, it may be advisable to wear protective glasses and gloves when performing LST Pruning, especially if working with large plants and strong branches.

By following these safety precautions, you can perform LST Pruning effectively and protect both the plant's health and your own. Remember that LST Pruning is a low-stress technique that benefits the plant and maximizes bud production, as long as it is done with proper care and attention.

Post-Pruning Care in the LST Technique (Low Stress Training)

Once you have applied the Low Stress Training (LST) technique to your plants, it is essential to pay attention to aftercare to ensure that the plant recovers and continues to grow healthily. Here are some guidelines on how to handle the plant after pruning and how to identify a successful pruning:

• Continuous Observation: After performing the LST, continue to closely observe the plant. This will allow you to spot any signs of stress or problems in the bent branches.
• Recovery of the Branches: Branches that have been bent during LST may take some time to recover and grow upward again. Be patient and allow the plant to gradually adapt to the new growth.
• Regular Maintenance: As the plant grows, you may need to adjust its position again to maintain even light exposure. Continue bending the branches gently as needed.
• Nutrients and Irrigation: Make sure the plant receives the necessary nutrients and adequate watering. Bent branches can affect nutrient distribution, so it is important to monitor the plant's needs.
• Stress Tracking: Look for any signs of stress on the plant, such as yellow or wilted leaves. If you notice severe stress in any part of the plant, consider relieving the tension in that area.
• Additional Support: Depending on the size of your plants and the LST technique applied, you may need to provide additional supports for bent branches. Make sure they are secure and do not break due to the weight of the buds.
• Selective Pruning: As the plant continues to grow, you can perform selective pruning to remove unnecessary leaves or branches that are not receiving enough light. This will help improve air circulation and bud production.
• Pest and Disease Control: Maintain constant control of pests and diseases in cannabis, since bent branches may be more vulnerable to these problems due to their greater density.
• Light Measurement: Use a light meter to make sure folded areas receive the proper amount of lighting. Adjust the height of the lights if necessary.
• Maintenance Pruning: Continue regular maintenance pruning to maintain the shape and health of the plant as it grows.

A successful LST should result in a plant with a broader structure and uniform light exposure. The buds should grow more efficiently and abundantly. If you follow these post-pruning care guidelines and pay attention to your plant's needs, you will be able to enjoy a more productive, high-quality harvest.

Tips to Avoid Common Mistakes After Performing LST (Low Stress Training)

After applying the Low Stress Training (LST) technique to your plants, it is important to avoid common mistakes that can compromise the health and performance of the plant. Here are some tips to avoid these mistakes:

• Do Not Overstretch Branches: Avoid applying too much pressure when bending branches during LST. Branches should be bent gently and gradually to avoid damage.
• Don't Neglect Monitoring: After performing the LST, it is crucial to continue observing and adjusting the branches as necessary. Don't assume that a single LST session is enough; It is a continuous process.
• Don't Forget Nutrition: Bent branches can affect the distribution of nutrients in the plant. Be sure to adjust your feeding practices to meet the plant's needs.
• Don't Ignore Stress: If you notice signs of stress on the plant, such as yellowing or wilting leaves, take steps to relieve stress in those areas. This may include adjusting bent branches.
• Do not Leave Abandoned Branches: Make sure all branches have access to adequate light and space. Bent branches should not become caught or blocked by other parts of the plant.
• Don't Neglect Hygiene: Maintain a clean environment around your plants to prevent pests and diseases. LST can create denser areas on the plant, increasing the need for hygiene.
• Don't be impatient: LST is a technique that requires time and patience. Don't expect immediate results, and allow the plant to gradually adapt to the changes.
• Don't Overdo the Fold: Avoid bending branches too far or at extreme angles. This can damage the structural integrity of the plant.
• Don't Ignore Support: If you use supports to hold the bent branches in place, make sure they are secure and will not fall over due to the weight of the buds.
• Don't Stop Monitoring: Constant observation is key to the success of LST. Continue to evaluate plant growth and make adjustments as necessary.

By following these tips and paying constant attention to your plants after applying LST, you will be able to maximize the benefits of this technique and enjoy an abundant, high-quality harvest. Patience and careful attention are critical to success when growing with LST.

Comparison of the LST Technique with Other Pruning Techniques

Below is a comparison of the Low Stress Training (LST) technique with other popular pruning techniques.

Comparison of LST with the Super Cropping Pruning

• Both techniques seek to improve the exposure of the branches to light.
• Both LST and Super Cropping allow you to control the height of the plant.
• Both techniques can reduce competition between branches and improve the distribution of energy and nutrients.
• Super Cropping involves more intensive bending and pinching of branches, often causing minor tissue damage, while LST focuses on gently bending branches without damaging them.
• In LST, branches are not cut or deleted, while in Super Cropping, sometimes part of a branch can be deleted.
• Super Cropping is primarily used to strengthen branches and allow better light exposure, while LST focuses on height control and light distribution.

Comparison of LST with Lollipopping

• Both techniques seek to improve the exposure of the branches to light.
• Both LST and Lollipopping can help control plant height.
• Both techniques can reduce competition between branches.
• Lollipopping involves the removal of the lower branches and leaves, while LST does not require the removal of any part of the plant.
• Lollipopping focuses on reducing the bottom of the plant to concentrate energy on the upper branches, while LST is used to bend the branches downwards and improve light exposure.
• LST can be done earlier in the plant's life cycle, while Lollipopping is usually done at later stages.

Comparison of LST with Apical Pruning

• Both techniques seek to improve the exposure of the upper branches to light.
• Both LST and Apical Pruning can control the height of the plant and redirect growth towards the main branches.
• Apical Pruning involves the removal of the top part of the plant (the apex) to encourage the growth of side branches, while LST does not involve the removal of any part of the plant.
• LST focuses on gently bending branches downward to improve light exposure, while Apical Pruning changes the growth pattern by removing the main tip.
• LST is less invasive and can be performed at earlier stages of plant growth, while Apical Pruning is generally performed at later stages.

Comparison of LST with the Schwazzing Pruning

• Both techniques seek to improve the exposure of branches to light at specific stages of the plant's life cycle.
• Both LST and Schwazzing can help control plant height and improve light distribution.
• Schwazzing involves removing most of the leaves at specific stages and then stretching the branches outward, while LST focuses on gently bending the branches downward without removing leaves.
• LST is a gentler and less invasive technique compared to Schwazzing, which can be more intensive in terms of leaf removal.
• Schwazzing is performed at specific stages and requires an intensive approach, while LST can be applied at various stages of the plant life cycle.

Situations where LST is most recommended

• Indoor cultivation: LST is especially useful in indoor growing, where you seek to maximize vertical and horizontal space, and a uniform distribution of artificial light is needed.
• height control: When you need to control plant height precisely without compromising bud production, LST is an excellent option.
• Early training: LST can be applied early in the plant life cycle and can be a continuous training technique throughout growth.
• Plants with long branches: For plants that develop long branches that could shade other parts of the plant, LST can help redirect growth and improve sun exposure.

The end result: healthier plants and larger harvests

Apply the technique of LST Correctly, it allows you to obtain stronger, more balanced plants with a structure that maximizes bud production. At the end of the process, growers obtain more abundant and high quality crops, with dense buds rich in trichomes, which increase both potency and flavor. This technique becomes an invaluable tool for those seeking optimize performance of its cultivation without resorting to aggressive methods.

In Grow Industry, we have all the necessary tools so that you can carry out the LST technique successfully. From precision scissors to training tapes and wires, our catalog offers high-quality solutions for your crops. Take advantage of this technique and elevate your harvests to a new level with trusted products!