When to plant or sow Runner Bean?

Runner beans are tender annuals that must be sown or planted after all risk of frost has passed, which in temperate Europe typically means from mid-May onwards through June. They thrive in full sun and prefer loam or clay soils that retain moisture well but don't become waterlogged. Before planting, dig in plenty of well-rotted compost or manure to enrich the soil and improve its structure—runner beans are hungry feeders and benefit from a fertile base. Sow seeds directly outdoors 5 cm deep and 20 cm apart along the base of a sturdy support structure. You can sow in double rows 60 cm apart to create a productive tunnel effect, or arrange them in a circle around a wigwam of canes at least 2.4 metres tall. Runner beans are vigorous climbers that will easily reach 200–300 cm, so ensure your supports are firmly anchored before planting. Alternatively, start seeds indoors in pots during late April or early May and transplant the young plants outside once the weather warms and they have two true leaves. Water the soil thoroughly after sowing or planting to settle the seeds or roots. Keep the area consistently moist during germination, which usually takes 7–14 days depending on soil temperature. Once seedlings emerge, guide the young shoots gently towards the supports if they wander. Mulch around the base of the plants with compost or well-rotted manure to conserve moisture and suppress weeds. Runner beans establish quickly in warm conditions and will begin climbing vigorously within a few weeks of germination.