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Mainlining Weed Guide

In cultivating cannabis, growers are required to learn about training techniques. These training methods allow for proper growth and increase the yielding potential of the plants. There are a lot of training techniques that can be applied to different types of strains but none is more effective than mainlining weed.

Whether you have a large outdoor farm or a small grow room, training your cannabis early on will drastically increase the quality and the resulting yield. These techniques are divided into two categories which are low-stress training and high-stress training. The goal here is to alter the plant’s structure and chemical properties so that it produces the positive result that all growers yearn for.

What is Mainlining Weed?

One such training technique that has been used in modern times is the use of mainlining. Mainlining weed is a technique that uses a term called “manifold” from a cannabis seedling to form larger buds during the plant’s flowering period. The plant’s main stem is simply split into two while it is still young and flexible enough. Training the plants this way should result in creating many colas or what is called as bud sites. This allows the plant to grow more buds thus increasing the yield of each plant.

The Goal of Mainlining Weed

In its natural state, marijuana plants usually grow and produce just one main cola. This often leads to only a few bud sites. Fewer bud sites mean fewer buds to grow and even lesser yield in the long run. To enhance the yielding potential of the plant, growers must break the apical dominance of the plant so that it can grow many long and thick secondary stems where more bud sites can grow.

Simply put, the goal of mainlining is to develop two secondary branches from the main stem so that it can grow several more tertiary branches where bud sites can grow and develop more buds.

Benefits of Mainlining

When growers learn how to mainline their cannabis plants, they get to enjoy countless benefits. One such benefit mentioned above is bigger yields for the same type of setup. You simply double the quantity of your yield as opposed to those plants that did not undergo such training techniques.

Another great benefit of this technique is convenience. Once you are done with mainlining your plant during the early stages of its life, there is no need for you to do anything else apart from feeding and watering your plant. The plant will just grow out its colas naturally. These colas also tend to grow at the same height thus you get better management with the canopy. Gone are the days when you worry about uneven canopy inside your grow room and risk having improper air circulation or many other factors that affect the plant’s environment.

Since you can control the plant’s growth especially with the canopy, you also lessen the risk of mold growth to the plant. Molds tend to grow when there is trapped moisture in between the stems. With the help of an even canopy and evenly distributed cola, proper air circulation is achieved thus limiting the amount of moisture in the plant.

How To Do Mainlining

Mainlining involves delicate hands and technique that allows for better manipulation of the plant’s growth. Note that this technique is done during the early stages of the plant’s life where it is still developing stems. Always exercise caution when handling the stems as it might break off easily.

This technique starts when the plant develops its third node. Top off the third node to produce a Y-shaped figure from the plant. Let the plant rest for a few days after removing the third node and then remove the foliage underneath it.

Now that you have a Y-shaped structure with two main shoots, you will need to tie down these shoots parallel to the ground almost making a T-figure. As always, remember to use less force when doing so to avoid snapping off the stems.

After some time, you can proceed to do the same with the shoots from the two main shoot and now you have four stems that can develop more bud sites. Growers can even produce up to 16 or more using this technique. While it can be done, it is not advisable to do so as it can produce too much weight for the main stem to hold.

By the time it reaches the third week, you should stop topping the plant to produce more shoots and carry on with the normal process of tending to your plants. You can also monitor the plant’s growth and continue to train the plant to grow horizontally as it keeps on growing. This way, you avoid developing lower branches that are desperate for both air and lighting. Ensure to provide proper nutrition, water, and lighting for the plants to grow and produce even more yields.


While there are a lot of advantages to using this type of technique for cannabis plants, there are certain disadvantages to employing this training method as well. Using this technique during the early stages will require the plant an ample amount of time to recover thus delaying the overall growth period of the plant up to 2 weeks.

Knowing the type of strain you use for mainlining is key to its success. Growers who cultivate auto-flowering strains should skip this technique as it will interfere with the fast growth of the plant and counterproductive to the purpose of growing auto-flowering strains. Additionally, growers who use low wattage lights won’t be able to penetrate the lower areas of the plant. Make sure to use around 150W HPS or LED to get better results.

When it comes to growing cannabis, there are different types of training methods used to employ to further enhance its yielding capabilities. Mainlining weed is just one of the many popular and effective techniques used by many growers today. Learning how to do so should help increase your yield and in turn, increase your profit.

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