PL. —Phaseolus vulgarisBotanical illustration — drop image

Green Bean

SpringSummerFall

3a–10bHardiness zone

Background

Green bean (Phaseolus vulgaris) is a warm-season annual legume grown for its tender, edible pods. Bush types are compact and self-supporting; pole types climb 5–8 feet and produce over a longer season. Both fix atmospheric nitrogen through root symbiosis, modestly benefiting crops that follow in rotation.

Sow directly into warm soil — at least 60 °F — after the last frost date. Succession-sow every two to three weeks through early summer to extend harvest. Pole types need a trellis or stake support erected before sowing to avoid disturbing roots later. Optimal soil pH is 6.0–6.8; work compost into beds before planting. Rotate bean plantings every two to three years to reduce soilborne disease pressure.

Pods harvested before seeds develop fully are used fresh or preserved; left to dry on the plant, the crop yields dried beans for long-term storage. The dried pod shells have a documented history in European traditional medicine as a tea for mild blood sugar support and as a diuretic, uses that have attracted preliminary pharmacological research.

Good companions

Marigold Sweet Corn Carrot Radiant Radish Mix

Keep apart

Bronze Fennel

Care guide

SunFull sun

WaterRegular

SoilWell-drained, fertile, slightly acidic

Spacing6–9 in

Height18–72 in

Zone3a – 10b

Direct sow

Seasonal tasks

spring

sowSuccession-sow a second and third planting every 2–3 weeks to extend the harvest window into midsummer.

sowDirect-sow seeds 1 inch deep once soil has reached at least 60 °F. Erect trellis or stakes for pole types before seeds go in to avoid root disturbance later.

summer

watchMonitor leaf undersides for Mexican bean beetle egg clusters and adult beetles; hand-pick and destroy. Knock aphid colonies off stems with a firm water spray.

watchCheck foliage for rust pustules, angular leaf spots, and anthracnose lesions on pods. Remove affected material promptly and avoid overhead watering to slow disease spread.

cutHarvest pods when fully elongated but before seeds visibly bulge — typically 50–65 days from sowing. Pick every 2–3 days to keep plants producing.

sowFor a fall crop, sow a final succession 8–10 weeks before the expected first fall frost.

fall

cutAt season's end, cut spent plants at soil level rather than pulling; leaving roots intact allows stored nitrogen to return to the bed.