Best companion plants for fruit trees in a food forest?

Soil Enrichment and Ecosystem Balance

Companion planting is a key strategy in maintaining a healthy food forest ecosystem. Nitrogen-fixing legumes, such as beans or peas, can be interplanted with fruit trees to enrich the soil with essential nutrients. These plants convert atmospheric nitrogen into a form that can be used by trees and other plants, reducing the need for synthetic fertilizers.

For best results, plant legumes within a 3-foot radius of the fruit tree’s drip line. Some examples of nitrogen-fixing legumes include broad beans, cowpeas, and lablab beans. These plants can be trained to climb up the tree or grown as a ground cover.

Pest Control and Deterrence

Certain plants can help deter pests that target fruit trees, such as aphids, whiteflies, and fruit flies. Nasturtiums and marigolds are excellent companion plants for this purpose, as their strong scents and bright flowers repel these pests. Planting these species around the base of the fruit tree can provide an effective barrier against infestations.

To maximize their effectiveness, plant nasturtiums and marigolds within a 1-foot radius of the fruit tree’s base. These plants can be grown in containers or directly in the soil, and can be easily replaced as needed.

Nutrient Accumulation and Fertilization

Comfrey is a nutrient accumulator that can be used to fertilize fruit trees. This perennial herb absorbs nutrients from the soil and stores them in its leaves, which can then be used as a natural fertilizer. To use comfrey as a fertilizer, simply chop its leaves and add them to the soil around the fruit tree.

For optimal results, plant comfrey within a 6-foot radius of the fruit tree. This will allow the plant to absorb nutrients from the soil and provide a consistent supply of fertilizer to the tree.