Companion Planting

What is companion planting? It's one of the foundations of creating working ecosystems when it comes to permaculture. We can group plants together when planning and planting our growing spaces to help crops deter pests/disease, mine nutrients from the soil, and attract pollinators. It's a way of creating a symbiotic relationship in your gardens, because the idea is the two plants (or more) that are companions are each providing to the other something that it cannot do. Or cannot do it alone...