Nutrient replenishment: Some plants may actually improve the nutritional value of the soil.Those with deep roots such as melons and tomatoes pull from deeper in the soil while those with taproots or tubers like carrots help to break up compaction. Soil balance: Plants with different root structures when planted together may aerate the soil allowing them to pull a variety of nutrients from different parts of the soil.Other plants actually attract beneficial insects that serve as predators for harmful insects. Marigolds, for example, are good companions for many plants for this reason.

Pest deterrent: Some plants are known to repel certain insect pests that feast on a particular plant.Pairing together plants with high water needs, for example, makes watering more efficient and ensures all plants receive the right amount of water. Similar growth needs: Plants might have similar needs for fertilizing, water, or sunlight, which makes it easier to take care of them.Or pairing deep-rooted vegetable with shallow-rooted vegetables can offer similar efficiency. Pairing tall upright plants with ground-hugging vines, for example, can offer efficient use of garden space. Non-competing growth habits: Plants can have different but complementary growth habits that do not compete with one another.The Spruce Home Improvement Review Board.

Potato cooking companions