Peas Companion Plants

Claim. Tall peas on netting cast light shade that can shelter late-spring lettuce as days warm; after the peas finish, the lettuce space is free for a summer crop.

Mechanism. Light shade and sequence of occupancy.

Conditions. Plant lettuce 3–4 weeks after peas. Lettuce on the shaded side of the pea row, 30 cm away. Both plants must be present at the same time.

Applies when. Spring beds.

Limitations. General practice; untested as a pair.

Evidence. Tier C: Indirect evidence: greenhouse or pot work, a related crop or species, or credible extension guidance with important uncertainty. (extension synthesis).

Sources. Cornell University 2024; Brooker 2015

Reviewed August 15, 2026 by Garden Planner editorial team (pending independent horticultural review). Record peas--lettuce--shade_or_shelter v1. Request a correction.

Claim. Garlic and peas are traditionally listed as incompatible. No evidence found; garlic is lifted in early summer as peas finish, so they rarely overlap for long anyway.

Mechanism. Claimed by tradition; no harmful interaction demonstrated.

Conditions. Planted together Both plants must be present at the same time.

Applies when. The planner does not separate these plants on this claim; it evaluates space, light, water and timing normally.

Limitations. Minimal overlap in time.

Evidence. Tier D: Traditional knowledge or structured community observations without a controlled comparison. (tradition).

Sources. University of Minnesota Extension 2023

Reviewed August 15, 2026 by Garden Planner editorial team (pending independent horticultural review). Record garlic--peas--flavor_or_growth v1. Request a correction.

Claim. Peas are said to shelter spinach. Light shade from peas can delay spinach bolting; this is a spatial fit rather than evidence.

Mechanism. Proposed by tradition; not demonstrated in a controlled comparison.

Conditions. Planted together Both plants must be present at the same time.

Applies when. Optional experiment, not a guarantee.

Limitations. Untested.

Evidence. Tier D: Traditional knowledge or structured community observations without a controlled comparison. (tradition).

Sources. University of Minnesota Extension 2023

Reviewed August 15, 2026 by Garden Planner editorial team (pending independent horticultural review). Record peas--spinach--shade_or_shelter v1. Request a correction.

Claim. We did not find a source that establishes a benefit or harm between peas and carrot.

Mechanism. None documented.

Conditions. Planted together Both plants must be present at the same time.

Applies when. The planner evaluates spacing, light, water and timing normally.

Limitations. Often listed together; no evidence of benefit or harm.

Evidence. Unknown: No source meeting the inclusion rules. (none).

Sources. University of Minnesota Extension 2023

Reviewed August 15, 2026 by Garden Planner editorial team (pending independent horticultural review). Record peas--carrot--other v1. Request a correction.

Claim. We did not find a source that establishes a benefit or harm between spinach and peas.

Mechanism. None documented.

Conditions. Planted together Both plants must be present at the same time.

Applies when. The planner evaluates spacing, light, water and timing normally.

Limitations. Commonly listed together; no evidence of an effect.

Evidence. Unknown: No source meeting the inclusion rules. (none).

Sources. University of Minnesota Extension 2023

Reviewed August 15, 2026 by Garden Planner editorial team (pending independent horticultural review). Record spinach--peas--other v1. Request a correction.

Claim. We did not find a source that establishes a benefit or harm between turnip and peas.

Mechanism. None documented.

Conditions. Planted together Both plants must be present at the same time.

Applies when. The planner evaluates spacing, light, water and timing normally.

Limitations. Traditionally paired; no evidence found.

Evidence. Unknown: No source meeting the inclusion rules. (none).

Sources. University of Minnesota Extension 2023

Reviewed August 15, 2026 by Garden Planner editorial team (pending independent horticultural review). Record turnip--peas--other v1. Request a correction.