What is a benefit of using companion planting in a greenhouse?

Using companion planting in a greenhouse provides significant benefits by helping to deter pests and enhancing plant growth. Companion planting is the practice of growing different plants in proximity for various mutual benefits. Certain plants can repel pests that commonly affect their companions, reducing the need for chemical pest control methods. For example, marigolds are known to deter nematodes and other pests when planted alongside vegetables.

Additionally, some plants can enhance each other's growth. For example, the classic pairing of corn, beans, and squash, known as the Three Sisters, allows beans to climb up the corn while fertilizing the soil with nitrogen, and the squash provides ground cover, reducing weeds. This synergistic relationship promotes healthier plants and can lead to more robust yields, ultimately making companion planting a valuable practice in greenhouse management.