Cannabis Companion Plant Guide
Explore the herbs, flowers, and ground covers most often used around cannabis gardens. This guide explains what each plant can contribute, where it fits best, and how to choose the right companions for your growing setup.
A Focused Guide to Companion Plants for Cannabis
Not every companion plant belongs in a cannabis garden. Some are useful for attracting beneficial insects, some work best as living ground cover, and others are included mainly for aroma, pollinator support, or broader biodiversity. The goal is not to fill the grow with random plants, but to choose companions that serve a clear purpose and suit the space you are working with.
What Makes a Good Cannabis Companion Plant?
The best companion plants for cannabis are useful, manageable, and suited to the conditions around the crop.
Supports a Clear Purpose
Good companion plants are chosen for a reason, such as attracting beneficial insects, covering soil, or supporting biodiversity.
Fits the Space
The plant should suit the growing setup, whether that means open beds, raised planters, or large outdoor containers.
Does Not Overcompete
A useful companion should not crowd cannabis roots, take over the space, or create unnecessary competition for water and light.
Adds Garden Value
The strongest companions contribute something meaningful to the wider garden system instead of simply taking up space.
Companion Plants for Cannabis
These are the main companion plants featured on Root Companions. Each one plays a slightly different role in the garden.
Marigold
A classic companion plant often included for broader natural support in mixed garden systems.
Read the Marigold guide →
Dill
A strong choice for attracting beneficial insects and adding diversity around cannabis beds.
Read the Dill guide →
Yarrow
Useful for supporting insect activity and creating a more balanced growing environment.
Read the Yarrow guide →
White Clover
A low-growing companion valued for ground cover, living mulch, and wider soil-supporting use.
Read the White Clover guide →
Chamomile
A soft, garden-friendly companion often included in diverse planting systems around cannabis.
Read the Chamomile guide →
Basil
An aromatic herb commonly included in companion planting setups for mixed-use gardens.
Read the Basil guide →
Nasturtium
A useful supporting plant for growers thinking more carefully about pest pressure around the garden.
Read the Nasturtium guide →
Lavender
A fragrant flowering plant valued for pollinator support, aroma, and broader garden diversity.
Read the Lavender guide →
Sweet Alyssum
A small flowering companion often chosen for beneficial insect attraction and garden diversity.
Read the Sweet Alyssum guide →Choose Companion Plants by Role
One of the easiest ways to choose a companion plant is to start with the job you want it to do.
Pest Support
Plants like marigold and nasturtium are often discussed in relation to natural garden support and pest pressure management.
Beneficial Insects
Dill, yarrow, lavender, and sweet alyssum are often included to help attract useful insect life into the space.
Soil and Ground Cover
White clover is one of the clearest examples of a companion plant chosen for low growth and soil-covering support.
Pollinator Support
Flowering companions can make the surrounding space more active, diverse, and visually integrated into a wider garden system.
Biodiversity
A mixed planting strategy can help make the garden feel less exposed and more balanced overall.
Aromatic Layering
Basil and lavender are often valued not only for their form, but also for the aromatic role they can play in mixed gardens.
How to Choose the Right Companion Plant
The best companion plant for one cannabis grow may not be the best choice for another. Outdoor beds, raised gardens, and large containers all have different limits. Before adding anything around cannabis, think about what you want the plant to contribute and whether it will stay manageable in the available space.
- Choose by purpose first, not by popularity.
- Match the plant to the size of the growing area.
- Avoid companions that spread too aggressively.
- Think about airflow, root space, and watering needs.
- Use fewer, better-selected companions instead of overcrowding the garden.
Keep Exploring Cannabis Companion Planting
Once you know which plants belong in the guide, the next step is understanding what they do and how to use them properly.
Start Exploring the Best Companion Plants for Cannabis
Browse the full plant list, learn what each companion contributes, and build a more thoughtful cannabis garden setup.