Companion planting is a fascinating vegetable theory that has been in practice for many years. It is a practice where you plant vegetables that are compatible with each other together so that they yield a better crop. The theory behind companion gardening is that some vegetables give off natural chemicals that help certain other vegetables to thrive.

If you plant vegetables that are not compatible with each other, they will produce fewer crops and be more susceptible to plant diseases. For example, garlic is sometimes planted around roses to repel aphids; however, garlic also inhibits the growth of peas and beans.