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Best Companion Plants for Growing Marijuana

A wide range of factors play into the art of growing healthy marijuana and producing a quality cannabis crop. Arguably the most important element is making sure that the environment you’re growing in is suitable for promoting a healthy plant lifecycle.

If the environment in which a plant is growing- whether it be marijuana or anything else- isn’t optimal, it’s much less likely to survive throughout its entire natural lifecycle. And even if it does manage to survive, it will likely produce a minimal crop of sub-quality buds that won’t deliver a decent high.

That said, when cannabis grows in optimum conditions , it’s exponentially more likely to survive and produce a more prosperous, better-quality crop yield.

Additionally , the plant will have a better opportunity to grow into the best possible version of itself and then pass its genetics onto its offspring. But many aspects will naturally prohibit cannabis plants from growing optimally, ranging from pests to improper nutrient absorption, anti-growth elements in the air, and so much more that responsible growers need to be aware of and keep a vigilant eye on.

Thankfully, there is an ingenious and easy way around many of these issues that can help ensure your marijuana plants are developing in a great environment to facilitate their optimal growth; companion planting. This 10,000-year-old technique will help ensure your cannabis plants thrive without you having to put forth large amounts of extra effort.

Here at a Pot for Pot , we’re huge fans of planting your own seeds, whether it’s cannabis or anything else. Here are some top suggestions for marijuana companion plants that you can use to help ensure you provide your cannabis with a great environment that will facilitate optimal levels of health and development throughout their lifecycle.

Companion Plants for Growing Marijuana

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What Is Companion Planting, and How Does it Work?

Companion planting, also known as polyculture or intercropping, is a beneficial method of growing plants, in which different plant types are grown side by side in a limited area to promote an optimized growing environment with higher crop yields. Companion planting falls under the scope of permaculture, which strives to replicate natural ecosystems in a contained environment.

In short, companion planting involves using different plants and herbs to facilitate the healthy growth of the primary plant, which is marijuana.

Companion planting allows for the release of chemical attractants and repellants of multiple plants at once in a small area , causing an enhanced growth cycle for all plants and providing pollination advantages and natural protection from different types of insects.

A wide array of varying companion plants can be used in this process, with each providing a different kind of environmental advantage. Onions, for example, release specific odors that naturally deter the presence of insects and prevent harmful infestations. Other companion plants provide shade to their neighbors, help provide soil structure and stability, and even add beneficial nutrients like nitrogen into the soil.

One well-known historical example of companion planting practices is the “three sisters” method utilized by different Native American tribes. They would plant squash, beans, and corn together in a single hole to help facilitate the optimal growth of each of the three species.

The corn would grow and develop into a support structure for the beans, and the beans would naturally serve as a fantastic source of nitrogen to improve the quality of the soil. At the same time, the squash would grow and help prevent the development of weeds around the three crops.

There is a wide range of benefits associated with companion planting , so there’s little wonder as to why this age-old technique has been utilized for thousands of years by individuals dedicated to growing any kind of plant. Additionally, there are no drawbacks to using this method, and it is an inexpensive and easy way to help promote the growth of healthy, robust cannabis in the grow room.

Benefits of Companion Planting

With a strategic approach, companion plants can help increase the yield of cannabis crops tremendously while also inherently promoting the health and prosperity of the plant as a whole. As noted briefly in the above section, companion planting also helps with pest control, nutrient refinement, and soil integrity, which are all integral factors of healthy cannabis growth.

Many companion plants act as a stealth cover for your cannabis growth, and using these particular plants will result in a safe, secure, and even discreet growth period for the plants.

For a grower, this can result in a more stress-free experience and a better return on investment for their time, money, and effort. Please keep reading through the following article to learn about the top plants to consider as companion plants for your marijuana to help create an optimal environment that will produce a quality bud yield.

The Rules of Companion Planting

Companion planting can be a fantastic and highly beneficial way to create an optimal environment for quality cannabis growth. However, there are many rules that growers should be aware of before utilizing the companion planting method to help ensure their efforts will be as successful as possible. For example, before selecting any companion plants, growers should diligently research their options and take note of the different elements that the companion plants will need to thrive alongside the primary plant.

Take careful note of how much sun each plant will need to receive every day to grow properly and remain healthy. Also, note the pH level of your garden, and determine the pH range required to support each of the plants so you can make any needed adjustments to your soil.

Additionally, you’ll need to ensure that each of your companion plants will have adequate drainage required for their growth and to prevent damage from the presence of too much water. For the best results, try to plant everything in a level area, since low areas may retain too much water and end up drowning the plants, while hills may cause the plants to lose too much water too quickly.

Best Plants For Companion Planting

The following herbs and flowers can help cannabis grow more efficiently and productively. Each can be used for a different purpose, from stealth to nutrient absorption and more. To make the best use of all their effects and to promote an environment suitable for optimal cannabis growth, growers should utilize a combination of at least a few of the following plants.

The ones any grower selects will depend on their personal preferences, time, space, and overall growing abilities. But it’s recommended that growers attempt to branch out to get as many of their benefits as possible.

1. Chamomile

Chamomile is a great defender against pests and whiteflies. While it is more famously known for producing calming tea, chamomile is a strong protective plant for cannabis, especially in the earlier stages.

Planting it next to cannabis keeps the insects at bay and can give younger plants a nutritional boost as well.

2. Dill

This popular herb is an ideal companion plant for cannabis. Dill has strong protective qualities which makes it an ideal defender companion plant. Dill drives insects like caterpillars away from cannabis as they prefer dill over other plants.

Dill also has strong repelling powers against bugs, mites, and aphids. Not only is it easy to plant, one can do so without causing any harm to the crop.

3. Basil

This ‘Prince of Plants’ is also a great companion plant for cannabis. Many farmers believe that basil helps improve the flavor of their crops like tomatoes. In the case of cannabis, it can boost the production of terpenes, which are essential oils found in cannabis.

Not only does it promote the growth of terpenes but it also attracts insects that help the cannabis plant while driving away harmful insects like asparagus beetles, mosquitos, and whiteflies.

4. Alfalfa

Alfalfa is a famous high grass – no, not cannabis, but a crop known to repel lygus bug. This pest is particularly harmful to the growth of marijuana.

Alfalfa also helps with adjusting the nitrogen levels in the soil, which are key to the growth of any plant – especially cannabis while it stores iron, magnesium, phosphorus, and potassium, all of which are important nutrients.

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5. Lemon Balm

Want to hide the odor of growing cannabis? Start by planting lemon balm around it. Lemon balm has an effective aroma that helps disguise the smell of marijuana.

This is particularly helpful with nosy neighbors and in areas where cannabis cultivation is frowned upon. The stealth benefit alone is a huge plus point of using Lemon Balm as a companion plant for any cannabis garden.

Lemon balm also helps repel mosquitoes and gnats, which keep the plants safe.

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6. Sunflower

Sunflowers are among the top companion plants for cannabis . Not only are they beautiful, but they also serve a strong purpose in cannabis cultivation. Sunflowers are helpful in luring insects away from cannabis due to their dominant presence.

Sunflower roots are helpful in soil filtration and preservation. Disguising any cannabis plant is easier when there are sunflowers next to it, they draw all the attention to themselves and leave little to no room for any distraction.

7. Lavender

Aesthetic value aside, lavender is highly useful for cannabis cultivation. Fleas, ticks, and mice are highly repulsed by the smell of lavender.

Planting it next to marijuana will keep pesky pests away and the cultivation safe from unwanted intruders.

Nectar-feeding bugs, which are beneficial to cannabis cultivation, love lavender and are attracted to it, thus benefiting the growth process of marijuana as well. Plus, it works great as a relaxant alongside cannabis .

8. Yarrow

Yarrow is a garden edge plant , which means that simply planting it around cannabis will not only save space but also help in yielding higher growth results.

Yarrow helps facilitate the release of essential oils in plants in its vicinity, which is an important aspect for any cannabis grower.

Yarrow also attracts insects like ladybugs, hoverflies, aphid lions, and mini wasps which end up protecting the marijuana plant.

9. Coriander

The strong and mostly undesirable scent of coriander keeps insects like aphids , spider mites, and potato beetles at bay.

On the other hand, it attracts tachinid flies, hoverflies, and a variety of parasitoid wasps that prey on bugs that cause harm to cannabis plants.

Using coriander as a companion plant for cannabis cultivation is a great way to deter pests and keep the plants safe from any unwanted visitors.

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Companion Planting: Best Cannabis Neighbours

More equals better, at least, that’s what many growers think. So anyone growing cannabis outdoor wants as many plants per square metre as possible, to make optimum use of available space. But did you know that you can make your weed plants thrive by planting other species next to, or even in between your cannabis crop? This approach, known as companion planting or intercropping, holds surprising benefits for cannabis growers. Here are some great neighbours for your marijuana plants, bringing properties that can boost your grow. They can enrich the soil or help keep pests at bay. As farmers know, diversity can be profitable. Your cannabis plants will be all the better for it, while you enjoy a gorgeous sea of fresh herbs and wild flowers.

Cannabis Companion Planting: Marijuana Neighbours

Combined planting or intercropping denotes mixing species of herbs, flowers, and other plants together with your original crop of choice. The idea itself is ancient: farmers soon noticed how certain species have traits that are useful for other species. Such companion crops can be said to grow symbiotically, in this case with cannabis, offering many advantages while doing so.

Even though the concept of companion planting has been around since the dawn of agriculture, growing vegetables, fruit, and even cannabis has shifted to a monoculture approach. You’ll notice this the minute you travel to the countryside: endless fields of corn and potatoes, as far as the eye can see. In recent years, however, farmers have rediscovered the proven benefits of mixed culture or combined planting. Acres and acres of land with just one crop are highly vulnerable to disease, pests, and weather extremes. Moreover, monoculture depletes the soil at record pace.

Cannabis really benefits from having the right neighbours around.

Plats allowed to grow in symbiosis with other species enjoy all sorts of advantages over monoculture crops. These advantages pertain not just to regular farmers: they hold true for marijuana growers as well. Cannabis companion planting involves specific neighbour plants selected for their useful traits. Benefits of cannabis companion planting include:

  • Greater biodiversity;
  • Attracting useful insects and other animals;
  • Repelling harmful insects and pests;
  • Enriching the soil (through nitrogen, for instance).

The Advantages Of Cannabis Companion Planting

Once growers plant their cannabis seeds in the soil, they can benefit from adding a few useful neighbours to their crop of choice. This is especially true for outdoor grows, but even indoor growers can make clever use of companion planting for better cannabis harvests. Marijuana intercropping can be a major improvement in the following ways:

Protecting Marijuana Plants Against Pests

Adding the right neighbours can be a source of protecting for cannabis plants. Certain insects and pests can wreak havoc on any grow. Some herbs, however, secrete certain aromas that can help repel such threats. These aromas are usually associated with terpenes similar to the ones cannabis plants use to protect themselves. Growers can also decide to surround their weed with herbs that are particularly attractive to specific pests instead. If done right, these companions will serve as a decoys, distracting harmful critters from fragile cannabis seedlings by offering a tastier alternative. This is a very eco-friendly pest control technique that uses the power of nature to your advantage.

Ladybugs are homicidal aphid killing maniacs. Use the right plants to attract them!

Promoting Biodiversity

As mentioned, monocultures are very fragile systems, but on top of that, they degrade and deplete the habitat of all plants. By planting a diversity of species, biodiversity increases, promoting the overall health of the entire growing environment. Several different species of flowers are likely to attract more insect species in turn, while further improving the environment for soil microbes. That will provide a solid basis for strong, healthy cannabis plants.

Healthy Soil And Nutrients

Soil health is key to growing strong, healthy marijuana. Soil is living matter, occupied by microbial colonies that break down organic matter. When these microbes eventually die, they provide nutrients in turn for reintroduction into the soil ecosystem. Some microbes also help keep nitrogen levels balanced. This explains how plants contribute to soil health and the vitality of the cannabis plants grown on that soil.

Companion Planting: Best Cannabis Neighbours

Below, you will find a summary of useful combined cannabis planting allies. This list is far from exhaustive, though: nature is infinitely complex and surprisingly sophisticated, so feel free to explore and find other useful marijuana neighbours!

Repelling Harmful Insects By Intercropping


Most people know basil as the aromatic herb used in Italian cuisine. However, growers can make great use of them to protect cannabis plants against mites, aphids, and whitefly. Basil also helps keep mosquitoes at bay as an added bonus; plus you’ll have fresh leaves to add to your homemade pasta sauce. On the other hand, basil can attract useful insects, too.

Basil – a tasty companion herb!


Planting lavender near your cannabis grow is a great idea. This plant, known for its wonderful, soothing scent, is perfect for attracting pollinator insects. Lavender also helps repel mice, ticks, moths, and fleas.


Garlic is not just very healthy for humans; it also helps guard the health of cannabis grows. Garlic is an absolute must to help against spider mites. You can use tie-rips to add the garlic and hang them to your plant. This plant can also repel maggots, slugs, and snails, for instance. Don’t be afraid you’ll be smoking Garlic kush, as the smell won’t effect your weed flavor.

Garlic and cannabis to help against spider mites!

Attracting Useful Insects By Combined Cannabis Growing

Not all insects are pests; far from it, actually. Cannabis growers ought to welcome useful insect species to their gardens, greenhouses, or even grow rooms. Try planting dill among your marijuana grow; it is known to attract predator insects (like ladybugs, ichneumon wasps, and hoverflies) that actually prey on pest insect species like aphids. Dill also attracts pollinators like bees and butterflies – plus it’s great on fried fish or grilled lamb!

Attracting hoverflies and certain wasp species is a good strategy against pests.


Geraniums do more than adding a classic flowery look to your garden; they’re also great cannabis companion plants. Geranium actually attracts insects that can threaten your harvest. If these insects decide to attack your geraniums instead, they’ll be less of a problem for the local weed population. The oil produced by geraniums is also known to repel harmful insects such as spider mites – a real grower’s nightmare you’d best avoid.

Cannabis Companion Plants For Nitrogen Balance


The roots of these pretty cannabis companion plants emit substances that feed nitrogen binding bacteria. For added companion growing effect, yarrow also attracts useful insect species.

Yarrow, pretty in any garden.


Everyone knows the bright yellow flowers of the dandelion. Most people consider dandelion a weed – they’re actually quite hard to keep out of your garden – and yet, they can be highly instrumental allies to marijuana growers. Its taproot can dig deep down into the soil, bringing minerals to the surface that would be hard to access for cannabis plants otherwise. What’s more, if you leave dandelions on your compost heap (without flowers), they’ll be a great nitrogen source for next year’s grow.

Companion Planting – Using Natural Allies For Cannabis Growers

Finding the right neighbours for a marijuana grow can hold many advantages. Soil nutrient availability increases, useful insects arrive to help keep pests at bay, and harmful insects are discouraged and distracted by smart plant allies. Best of all, growers get (nearly) all of that aid for free, without any pesticides or other artificial interventions…

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Cannabis companion planting makes gardens more diverse, helps increase biodiversity, and provides a fresh supply of kitchen herbs as well! All in all, you’ll see the benefits of these friendly neighbours in healthier marijuana grows that may even get you better yields. Best of all, you’ll help your plant without harming the environment, no matter which top-quality marijuana genetics you’re protecting. If you’re interested in learning more about eco-friendly tips to keep pests at bay, be sure to check out our other grow blogs. You’ll find out how to keep snails and slugs from munching away at your plants, how to stop fungi like bud rot and mildew, and many more useful grower tips besides!