How to Crossbreed Weed: Basic Breeding Techniques

how to crossbreed weed

Just by browsing different websites about marijuana strains, you can already notice how strains are composed of different strains. Crossbreed ones are mostly because of experimentation wherein breeders deliver in order to come up with the desired effects, taste, and even scent. While some strains deliver faulty effects, there are numerous strains that are successfully bred and loved by cannabis communities. Whether if it is for personal use or business, growing crossbred weed will always gain interest among growers and breeders. 

Breeding processes vary on how complex or simple the process may be. Cross-breeding strains on your own is not that difficult to get ahold of even for beginners. All you need is to be well-acquainted with the growing properties and features of the chosen strains. The interest of cannabis connoisseurs makes the growing number of marijuana strains crossbred. With that in mind, read on as we discuss the considerations to check prior to breeding cannabis as well as detailed instructions on how to crossbreed weed. 

What are the Considerations in Breeding Cannabis? 

It is very common wherein breeders and growers conduct research prior to the breeding and growing process. This will allow them to set their expectations on what to anticipate during its growth. Besides, as a grower, you have to have complete control during its reproduction. As we introduce instructions on how to crossbreed weed, you have to study the considerations first before doing so. Here are four factors to be considered in breeding cannabis. 


In order to come up with satisfactory results, you have to choose the right x and y chromosomes. The parents of the strain should be well-researched in order to know what the product would be composed of and how would the finished product deliver its acquired effects. Genetics should be highly considered. Besides, there is a variety of strains to choose from that will serve as the parents. Be wary of the genetics of the strains you’re going to choose. 

Study their properties in order to make adjustments and deliver growing techniques accordingly. You can check different dispensaries about their top-notch strains, and you can start from there. This way, the legitimacy of the seeds has not tampered and the chances of faulty crossbreeds. Buy different seed types that you prefer to crossbreed to have options. In addition, crossbreeding is useless if you’re going to crossbreed the same seed types and classifications. 

Growing Patterns 

Now that you have chosen your preferred strains to cross, it’s time to evaluate its growth patterns. Look out for the average flowering time, amount of buds produced, height, preferred climate, light cycle, and watering schedule. Once you have figured out these factors, it is time to put the plants in the vegetative state before breeding them together. Remember, this is a trial and error process, so you have to engage in being wary of the signs it is delivering. 

Indoor and Outdoor Growing Area 

Choosing between indoor and outdoor growing areas depends on the laws of the local government in growing marijuana. Each may have its own advantages and disadvantages, but you have to weigh in the factors as to which is the best one for the crossbred strain. Indoor growing environments are highly suggested considering that there is control in terms of heat, light, and wind. On the other hand, outdoor growing environments have access to natural sources of light, heat, and wind. 

Both environments produce wealthy buds, but the amount they produce varies. Outdoor environments produce taller, bushier, and bigger marijuana plants. Meanwhile, indoor environments produce smaller and bushier marijuana plants. The choice depends on the legality of growing marijuana. It would be best to check out the laws of the local government first before making a choice. If they are prohibited, you can consider growing them indoors and invest in equipment instead. If they are not prohibited, then make the most out of your backyard. 

How to Crossbreed Weed? 

For the exciting part, it’s time to know how to crossbreed weed and see its outcome. Right after choosing your preferred male and female plants, the next step is to proceed to the crossbreed process. Make sure that the male and female pollens are stored in an air-tight container to prevent unwanted cross-pollination. Check out these five steps and follow them accordingly. Read each step before performing it. 

Step 1: Choose the Male and Female Plants

When it comes to choosing the male and female plants, it’s a trial and error process in order to find the most suitable pair. Compared to finding the female plant, finding the male ones are more difficult. It would be best to try it with different females first to know what type of offspring will they produce. Once you are satisfied with the finished product, you can start planting them in a secured and secluded area. During the growing process, it would be best to have them separated, especially when the small pollen sacs of the male show. 

Step 2: Collect the Pollens 

Once the pollen sacs are developed or mature, it is a sign that they are ready to be collected. The easiest way to do it is to use an air-tight bag such as a Ziplock. Insert it inside the bag and seal the stem part. Shake the bag so the pollens will be transferred to the bag. If you have no plans of pollinating them immediately, it can be stored and preserved in a freezer. The lifespan of the pollens is up to a month, so use it within the timeframe. Before doing the same to the other matured pollen sacs, shower and change your clothes because pollens have the ability to stick to anything, especially fabrics. 

Step 3: Pollinate the Female Plants 

Once you are done collecting the pollens of the male plants, it’s time to check the female ones. After a few weeks, females will deliver signs that they ready to be pollinated. White pistils will start to bloom, explaining the formation of the buds in the long run. The pistils should be white in color. To avoid unwanted cross-pollination, isolation of the female plant is highly suggested and keep the room free from fans as much as possible. 

To start the process of pollination, insert the stem inside the same air-tight bag like the one with the male pollens, and shake it well. This will ensure that each bud will be fully coated with the female pollens. For a couple of hours, cover the site using the bag. Shake it continuously for a minute to keep it all out. To ensure that all pollens are out, leave the bag on the site of growing for up to 12 hours, and carefully remove it after. 

Step 4: Add Nutrients 

Just like how women need additional vitamins when they are pregnant, female plants work the same. They need supplementary nutrients such as Nitrogen. It’s not a bad idea to follow a vegetative stage feeding schedule. After a few weeks, the seeds will start to form, and calyxes will grow afterward. For the seed storage, keep it in a place where it is cool and dark but not to the point of freezing. 

Step 5: Plant the Seeds 

The fifth step is planting the seeds. Prior to that, the process of germination should be delivered. Note that it is dependent on how these seeds will grow. Keep a notebook where you can take notes of the potency, flowering time, color, scent, and taste of the plant. In case one hybrid turns out to be remarkable, keep clones aside for reference in case you want to continue breeding it. 

Tips and Tricks in Starting a Crossbreeding Project

Tip #1: 

Identify the reasons why you’re deciding to start a crossbreeding project. List down what are the traits you’re looking for in a marijuana strain. What do you want to achieve? What are the characteristics you’re looking for? What are your goals in crossbreeding marijuana strains? These are the questions that should be answered prior to crossbreeding. This will help you manage your expectations along the way. It will also allow your plants to adapt to its growing environment as it adjusts to necessary changes. 

Tip #2: 

If you have limited growing space, it would be best to start growing in small pots. This will help in maintaining the size of the plant. Besides, they are easily organized and labeled this way. Separate the large growing plants from the small ones. 

Tip #3:

Label each plant accordingly and always keep it organized to easily locate them. Mislabelled plants are the worse considering that you might be crossbreeding the wrong plants. Organizing them would help in managing their light cycle and watering schedule. 

Tip #4:

To manage the resources, it would be best to narrow down the choice of plants to grow. Besides, growing 30 to 60 plants altogether can be quite demanding in terms of resources. Start to test the flowers every plant has to see what its capabilities are. 


Crossbreeding is not rocket science that even newbies in growing marijuana can try it. Considering that you have to conduct trial and error processes with every strain, it may require a lot of labor in order to achieve your desired outcome. There are thousands of strains to try before you find your ideal hybrid to clone, grow, try, and distribute. 

It’s hard to get lucky even when you are well-acquainted with all the strain’s properties. Knowing how to crossbreed weed is the most important part of the process. Instead of stressing out whether it will be successful or not, it would be best to enjoy it and consider it as a learning ground.