Best companion plants for chestnut trees?

Companion Plants for Soil Fertility

Comfrey (Symphytum officinale) is an excellent companion plant for chestnut trees, as it acts as a fertilizer plant. Comfrey’s deep taproots allow it to absorb nutrients from the subsoil, which are then released as a nutrient-rich tea when its leaves are chopped and added to the soil. This process enriches the soil around the chestnut tree, promoting healthy growth and development. Plant comfrey around the base of the chestnut tree at a 3-foot distance, and prune its leaves regularly to avoid shading the tree.

Beneficial Insects and Pest Control

Yarrow (Achillea millefolium) is another beneficial companion plant that repels pests and attracts beneficial insects. Its fern-like foliage and white or yellow flowers attract lady beetles, lacewings, and other beneficial insects that prey on pests that target chestnut trees. Plant yarrow around the periphery of the chestnut tree’s canopy, spacing it 12-18 inches apart, to create a natural barrier against pests.

Integrating Companion Plants into Your Food Forest

When integrating companion plants into your food forest, consider layering them according to their growth habits. For example, plant comfrey or yarrow in the shrub layer, where they can access the subsoil and benefit the chestnut tree. This layering approach promotes a diverse and resilient ecosystem, where each plant supports the growth and health of its neighbors. By incorporating these companion plants, you can create a thriving food forest that minimizes the need for external inputs and maximizes the potential for your chestnut trees to thrive.