Companion Planting

Companion planting entails the planned association of two or more plant species in close proximity so that some cultural benefit (pest control, higher yield, etc.) is derived. The concept embraces a number of strategies that increase the biodiversity of agroecosystems... While companion planting has a long history, the mechanisms of beneficial plant interaction have not always been well understood. Traditional recommendations used by gardeners have evolved from an interesting combination of historical observation, horticultural science, and [unconventional wisdom]." - Appropriate Technology for Rural Areas (ATTRA) Bulletin, 1999

Companion plants develop a symbiotic relationship with each other. We all know about the usefulness of legumes - beans, clover, and other leguminous plant can "fix" nitrogen in the soil, for use by other plants. Because of their strong smell, various herbs (and some other plants, like onions, leeks, and garlic) are useful at "hiding" many plants from marauding insects. According to ATTRA, "some plants exude chemicals from roots or aerial parts that suppress or repel pests, and protect neighboring plants." (Marigolds are a good example, here.) ATTRA also notes that some plants offer benefits derived from "physical spatial interaction...The diverse canopy resulting when corn is companion planted with squash or pumpkins is believed to effectively disorient the adult squash vine borer and protect the vining crop...Beneficial habitats are another type of companion plant interaction. The benefit is derived when companion plants provide a desirable environment for beneficial insects and other arthropods, especially those predatory and parasitic species which help to keep pest populations in check." What is not yet well understood is how the relationship between many other plants works - but there is significant evidence to prove that it does.

Here's a companion planting chart we've developed over the years. Try it for yourself, and let us know how it works for you!