Beans

Phaseolus vulgaris, the common bean, is a herbaceous annual grown worldwide for its edible pods and seeds. It encompasses bush and climbing types, ranging from compact 30 cm plants to vigorous vines reaching 2 metres, producing pods in green, yellow, or purple. Beans are warm-season plants that demand well-drained soil and full sun, and are highly sensitive to cold and waterlogged conditions. The diversity of varieties — snap, wax, French filet, shell, and dry — makes this one of the most versatile vegetables in any kitchen garden.

Growing

Direct-sow seeds only once soil temperature reaches 12 °C and nights remain reliably above 10 °C — cold, wet soil causes rot and poor germination. Sow 3–5 cm deep, placing seeds 10–15 cm apart in rows 35–50 cm apart for bush types; for climbing varieties allow 10–15 cm between plants and erect a sturdy support (poles, trellis, or wigwam) at least 2 m tall before sowing. For an earlier harvest, climbing varieties such as Neckarkönigin can be started indoors 2–3 weeks before outdoor conditions are suitable, transplanting carefully to avoid root disturbance. Do not sow too early — beans will not germinate properly below 22 °C soil temperature. Germination takes 7–10 days under optimal warmth.

Care

Water consistently but avoid waterlogging; beans prefer even moisture at the root. Apply a balanced liquid feed once pods begin to form, but avoid nitrogen-heavy fertilisers before flowering as they promote leafy growth at the expense of pods. Climbing varieties need guiding onto their supports in early growth; once they find the structure they self-twine. Bush beans need no staking. Mulch between rows to retain moisture and suppress weeds. Do not work around the plants when foliage is wet to reduce the risk of fungal disease.

Harvest

Harvest snap and wax beans when pods are firm, crisp, and fully filled but before the seeds inside begin to swell noticeably — typically 53–60 days from sowing at optimal temperatures. Check plants every 2–3 days; pods left on the vine signal the plant to stop producing. Pick with a sharp snap or scissors to avoid pulling the stem. For shell beans, wait until pods are visibly swollen with plump seeds. For dry beans, leave pods to dry fully on the plant until papery. Continuous picking extends the harvest window significantly.

In the kitchen

Snap and wax beans are excellent steamed, blanched, stir-fried, or roasted with olive oil and garlic. French filet types are best blanched briefly and dressed simply to highlight their delicate flavour. Shell beans can be added fresh to soups and stews, and dry beans rehydrate for cassoulet, minestrone, and bean salads. Purple-podded varieties lose their colour on cooking and turn dark green — use them raw in salads to preserve the visual effect.

Storing

Fresh snap and wax beans keep for 4–6 days in the refrigerator in a paper bag or unsealed container. For longer storage, blanch for 2–3 minutes, cool in ice water, drain, and freeze in portions — frozen beans keep well for up to 12 months. Shell beans can be refrigerated for 2–3 days or frozen directly. Dry beans should be fully dried, then stored in airtight glass containers in a cool, dark place where they keep for 2–3 years.