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does basil repel aphids

Companion Plants that Repel Aphids in Cannabis Plants

Discover the valuable role that the modest basil plant can play in safeguarding your garden against common cannabis pests. Beyond its delightful aroma and taste, basil serves as an essential companion plant in a diverse garden ecosystem. Its robust chemical composition acts as a deterrent to aphids, simultaneously attracting beneficial organisms. Does basil repel aphids? Let us explore the reasons behind incorporating this pest-thwarting companion plant into your garden for the upcoming growing season.

Basil Companion Plants

does basil repel aphids

Basil stands out as a widely recognized companion plant for cannabis cultivation. It emits compounds effective in deterring pests like mosquitoes, flies, and spider mites. Moreover, its robust and pungent aroma serves to conceal the scent of cannabis, reducing its detectability by pests and animals. This proves particularly beneficial for outdoor growers aiming to maintain discretion and keep their cannabis plants concealed from sight.

Is Basil a Weed have terpenes?

Most plants generate a variety of terpene molecules, considered secondary metabolites with roles that don’t directly contribute to growth and reproduction but are crucial for overall plant health. These volatile hydrocarbons serve multiple functions:

  • Communication: Plants utilize terpenes as chemical signals to communicate with each other, acting as a form of environmental messaging.
  • Attraction: Beyond vibrant colors, plants like basil attract beneficial insects through the release of pungent terpenes, enticing pollinators, and other beneficial critters.
  • Stress Tolerance: Terpenes play a role in enhancing stress tolerance in plants like basil, particularly during challenging environmental conditions such as drought and intense heat.
  • Defense: Terpenes serve as a defense mechanism, deterring pest insects by disrupting their feeding and reproductive processes.

Interestingly, basil shares several basic terpenes with the cannabis plant, including Eucalyptol, Linalool, Limonene, and Caryophyllene.

What advantages does basil bring to your cannabis garden?

does basil repel aphids

Aphid Pest Control

Are you in search of plants that can effectively repel aphids? Look no further! Aphids pose a significant challenge for cannabis growers due to their rapid reproduction and potential to quickly overrun plants. Despite their small size, these pests utilize sharp mouthparts to extract sap from plant tissue, depleting resources and making plants vulnerable to fungal infections.

Basil proves to be a valuable ally in keeping these troublesome six-legged pests at bay in multiple ways. Firstly, its potent terpenes attract predatory insects like ladybugs, which actively prey on and consume aphids. Secondly, the strong aroma of basil’s terpenes acts as a deterrent for certain types of aphids, as plants employ these compounds as a chemical defense mechanism. With its abundance of insect-repelling terpenes, basil emerges as an excellent companion plant for cannabis, offering effective protection against aphids.


Are you inclined towards hydroponic cultivation instead of traditional soil-based methods? Well, basil is an excellent fit for hydroponic systems, proving to be a beneficial companion plant for cannabis in this setting for several reasons:

  1. Pest Control: Basil contributes to pest management within your hydroponic system, whether it’s an indoor setup within a grow tent or an outdoor garden.
  2. Effortless Integration: If you utilize growing trays with multiple net cups, incorporating basil plants between your cannabis plants is seamless, eliminating concerns about spacing and overcrowding.
  3. Enhanced Yields: In hydroponic systems, basil exhibits accelerated growth, resulting in larger yields. Besides safeguarding cannabis plants from aphids, this ensures an ample supply of fresh basil leaves for culinary use, adding flavor to pizzas and pasta sauces.
  4. Space Efficiency: While basil thrives in hydro setups and grows more substantially, it maintains a manageable size compared to some other companion plants. Should the plants become overly tall, a simple topping, akin to the practice with cannabis plants, keeps them in check.

Cultivating Basil in Your Garden

Commence the cultivation of basil seeds indoors in February, providing optimal conditions under grow lights or on a sunlit windowsill. Sprinkle the seeds onto a seedling soil mix and lightly cover them with vermiculite.

Given its preference for warmth, refrain from transplanting basil into the garden until the threat of frost has diminished. Choose a sunny location with well-draining soil, allowing 8–10cm of space between individual plants.

Maintain the moisture levels for basil plants, ensuring deep watering approximately once a week (more frequent during heatwaves) to prevent root desiccation. Basil, distinct from other leafy greens, requires minimal nutrients. An application of a light seaweed solution or worm-casting tea once a month proves beneficial.

For sustained productivity throughout the growing season, early topping of young plants is recommended. Regular harvesting of leaves promotes the development of bushy structures in your basil plants.

Why Basil is the Best Companion Plant for Cannabis

Utilizing companion planting proves to be a beneficial strategy for cannabis cultivators aiming to boost the overall well-being and development of their plants. Whether the goal is to enhance soil quality, manage pests, or enhance the garden’s aesthetics, there exists a suitable companion plant to meet these objectives. By carefully choosing and planting the appropriate companion plants in proximity to cannabis, cultivators can establish a sustainable and flourishing cannabis garden, ensuring a consistent yield of high-quality buds for an extended period.


1. How does basil help in repelling aphids from cannabis plants?
Answer: Basil contains natural compounds such as citronellol and linalool, which have insect-repelling properties. Planting basil near cannabis can help deter aphids by creating an unfavorable environment for them.

2. What is the recommended method for using basil to repel aphids in cannabis cultivation?
Answer: Planting basil around the perimeter of your cannabis garden or intercropping basil with cannabis is an effective method. The aroma of basil disrupts aphids’ ability to locate and feed on cannabis plants.

3. Are there specific basil varieties that are more effective in repelling aphids from cannabis?
Answer: Some basil varieties, such as Sweet Basil (Ocimum basilicum) and Thai Basil (Ocimum basilicum var. thyrsiflora), are known to have stronger insect-repelling properties. These varieties can be particularly effective in deterring aphids.

4. How often should basil be planted to maintain its aphid-repelling effect in a cannabis garden?
Answer: Planting basil at regular intervals, such as every 1-2 feet around the cannabis plants or in between rows, is recommended for optimal results. This helps create a continuous barrier that deters aphids throughout the growing season.

5. Can basil be used in conjunction with other natural methods to control aphids in cannabis cultivation?
Answer: Yes, incorporating basil into an integrated pest management (IPM) strategy can enhance its effectiveness. Combining basil with other natural repellents, beneficial insects, and proper cultural practices can create a holistic approach to controlling aphids in cannabis gardens.

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