garden nasturtium

C

cabbage, broccoli, and allies

Brassica oleracea

Nasturtium acts as a trap crop for aphids, drawing them away from brassicas. It also attracts beneficial predatory insects that consume brassica pests.

T

tomato

Solanum lycopersicum

Nasturtium acts as a trap crop for aphids and repels whiteflies, reducing pest pressure on nearby tomato plants. The pungent volatile compounds deter thrips and spider mites.

R

Rosemary

Salvia rosmarinus

Rosemary's volatile oils (camphor, borneol) are reported to repel bean beetles and cabbage loopers; nasturtium also repels these pests, creating a complementary deterrent layer.

B

Bronze Fennel

Foeniculum vulgare

Fennel is allelopathic to most companion plants; its root exudates inhibit germination and growth of Tropaeolum and many other species. Fennel is generally best grown in isolation.