What Are the Best Ground Cover Companion Plants?

Low-growing companion plants that spread across the soil surface serve several valuable functions in the vegetable garden: they suppress weeds by shading the soil between taller crops, retain moisture by reducing surface evaporation, protect the soil from heavy rain (which can cause compaction and run-off), and provide habitat for ground beetles and other beneficial predators. Choosing the right ground cover companions — ones that do not compete aggressively with the main crop — is the key to making this approach work effectively.

Clover as a living mulch

White clover (Trifolium repens) is perhaps the most useful living mulch for the vegetable garden. It grows low (rarely exceeding 15 cm), tolerates light foot traffic, fixes nitrogen, and flowers prolifically for bees. Sow it in the paths between beds or in the spaces between fruit trees and bushes. In an established fruit garden, a clover understorey significantly reduces weeding, retains moisture, and builds soil fertility over time. Remove it from annual vegetable beds before they are cultivated.

Squash and pumpkins as ground cover

The large, spreading leaves of squash and pumpkin plants function naturally as a dense ground cover between taller plants like sweetcorn — this is one of the key roles in the Three Sisters combination. The leaves shade the soil completely, preventing weed germination and retaining soil moisture effectively. This is a useful approach in any situation where taller crops leave significant bare soil that would otherwise need mulching or regular hoeing.

Strawberries under fruit trees

Strawberries as a ground cover under apple, pear, or plum trees make good use of the partially shaded, sheltered microclimate at the base of the tree. They suppress weeds, produce fruit from otherwise unused space, and do not compete significantly with the tree's deep root system. Choose perpetual-fruiting or alpine strawberry varieties which are more shade-tolerant than main-crop varieties.