Potato + Bush Bean

Potato and bush bean make a practical row-garden pairing with reciprocal pest benefits. Beans fix atmospheric nitrogen, supplementing soil availability during the potato's mid-season bulking phase. The more commonly cited benefit is beetle suppression: bush beans reportedly deter Colorado potato beetle, while potato is said to reduce Mexican bean beetle pressure on the beans. Evidence is observational rather than controlled-trial rigorous, but the pairing costs nothing extra and the nitrogen contribution is well established.

Plant in alternating rows, keeping beans 12 to 18 inches from potato stems to avoid root competition. Time planting so both crops go in around the same date after last frost; potatoes can tolerate a slightly earlier start if soil temperature is above 45°F. Both crops prefer loose, well-drained soil with similar pH (5.8 to 6.5). The pairing is less useful in very small beds where interplanting crowds either crop, or where Colorado potato beetle pressure is already managed chemically.