Strawberries Companion Plants
Strawberries grows best alongside companions that pull their weight. Reliable partners include Garlic, Chinese chives, Alfalfa, and Sweet alyssum. Just as important is what to keep apart — avoid planting strawberries near Solanaceous crops, Brambles / caneberries, and Brassicas / cole crops. Every pairing below comes with the specific reason behind it and how to stack them by layer and season.
Grow Strawberries with: Garlic, Chinese chives, Alfalfa, Sweet alyssum, and more below.
Keep it away from: Solanaceous crops, Brambles / caneberries, Brassicas / cole crops.
Best companions for Strawberries
Each pairing below earns its place — the reason, when to plant it, and where it sits in the bed.
Garlic interplanted between strawberry rows lowers two-spotted spider mite (Tetranychus urticae) via sulfur volatiles, and the fall-to-summer allium crop raises the land-equivalent ratio without displacing the berries.
Layout: Plant garlic cloves in fall between/within the strawberry rows; it grows through winter and spring and is pulled at bulb harvest in early summer, freeing space just as berries size up.
Chinese chives undercropped in strawberry high tunnels cut seed-bug (Neopamera bilobata) populations by ~47%; allium leaf volatiles repel the bug that scars fruit and feeds on the achenes.
Layout: Set as a perennial understory beneath and between strawberry plants; persists year-round in tunnels and needs no reseeding once established.
Alfalfa is a preferred Lygus (tarnished/western plant bug) host; a border strip draws bugs off the berries to be vacuumed, reducing adult/nymph abundance 72%/90% and cutting Lygus fruit damage in adjacent organic strawberries.
Layout: Establish alfalfa strips beside the bed before/at bloom when Lygus arrives; mow or vacuum the strip periodically so trapped bugs don't move back into the berries.
Alyssum's shallow nectar feeds adult hoverflies (Syrphidae) whose larvae eat aphids, and its pollen sustains released predatory mite Neoseiulus californicus, aiding two-spotted spider-mite control in organic strawberry trials.
Layout: Sow among or at the edge of the planting at the same time as strawberries; it blooms continuously all season to keep feeding natural enemies.
Marigold grown as a pre-plant cover suppresses root-lesion (Pratylenchus penetrans) and root-knot nematodes as a poor 'dead-end' host releasing nematicidal alpha-terthienyl; strawberry after a vetch/marigold/rye rotation yielded markedly more.
Layout: Grow a dense marigold stand the season BEFORE strawberries and turn it under; this is a rotation crop to clean the soil, not an in-bed neighbor.
Borage's nectar-rich blue flowers draw honey bees and bumblebees that may improve strawberry pollination, plus hoverflies and parasitic wasps; the yield/flavor boost is widely reported in garden lore but not rigorously quantified.
Layout: Set a few plants at bed edges at planting so bloom overlaps strawberry flowering; it self-seeds freely, so thin it to keep it from shading the crop.
Low creeping thyme forms a fragrant living mulch that shades soil and suppresses weeds between crowns, and its flowers feed hoverflies and parasitoid wasps. Pest-repellent claims are traditional, not quantified for strawberry.
Layout: Plant as an edging or pathway mat at the same time; perennial, it knits in to fill the gaps between strawberry crowns.
Bush beans fix atmospheric nitrogen through Rhizobium root nodules, enriching soil for shallow-rooted strawberries as residues break down. Measured live N transfer to neighbors is small; keep beans away from alliums, which suppress legumes.
Layout: Interplant in a strawberry establishment year, sited apart from any garlic/onion/chives; the nitrogen benefit accrues to the bed mainly after the beans finish and residues decay.
Fast, shallow-rooted lettuce and spinach fill the open ground between young strawberry crowns, shading soil to suppress weeds, then are harvested out before runners need the room, leaving little lasting root competition.
Layout: Sow at strawberry planting and harvest the greens within ~40-60 days as strawberry runners spread to claim the space they vacate.
How to lay it out
Stack companions by layer so they share light, root space, and time instead of competing — the permaculture way to pack more into one bed.
Layers for a Strawberries guild. Tags mark companions planted on a delay so they fill in as the bed matures.
Plants to avoid near Strawberries
All host Verticillium dahliae, whose microsclerotia persist in soil for many years, then infect and wilt strawberry crowns. Extension guidance: don't plant strawberries where these grew in the past ~4-5 years.
Caneberries are Verticillium hosts and share pests and viruses with strawberry; planting near or after them raises wilt and disease pressure. Extension rotation guides list brambles among crops to avoid before strawberry.
Heavy-feeding cole crops compete strongly with shallow-rooted strawberries for nitrogen and space and can stunt them; the pairing is traditionally discouraged, though no specific shared disease drives it.
Fennel is widely reported to release allelopathic compounds from its roots and residues that can inhibit nearby plants, so it is traditionally kept isolated from strawberries and most garden crops.