Plant library · Vegetables
Phaseolus coccineus
Runner bean is a fast-growing annual vine that brings a tall, narrow vertical element to the vegetable garden. Reaching about 10 feet high while occupying roughly 18 inches of width, it combines summer beans with showy red flowers that draw hummingbirds. Use it where a trellis can turn height into a useful screen or backdrop without crowding the rest of the bed.
Set runner beans along the north edge of a sunny bed, against a fence, or on a dedicated trellis so their 10-foot vines do not cast shade across shorter crops. Install a tall, sturdy support before planting; the vines climb by twining and need the framework from the start. A row of plants can make a seasonal living wall, but keep the support far enough from paths that foliage and developing pods remain reachable from at least one side.[1][2][3]
Plant 9 inches apart, center to center, then train each vine promptly onto its own section of support. That close planting interval creates a continuous vertical row, while the mature 18-inch spread calls for clear air and working room on either side of the trellis. Reserve the ground plane beneath the structure for low, short-lived crops only if they will not obstruct watering, tying in vines, or harvest access.
Give this climber full sun and regular water in soil that stays moist but drains freely. Place it where a hose or drip line can serve the root zone easily, especially if the trellis sits beside a wall or fence that sheds rain. Avoid making the support the far edge of a deep bed unless there is another route for watering and picking.[1][3]
The trellis becomes occupied quickly through the summer as the vines climb, flower, and produce beans, so treat its footprint as a full-season feature rather than a temporary stake. Plan for roughly 70 days to maturity, with summer bloom and harvest. Remove the annual vines after the growing season to reopen the bed and support for the next planting plan.
Give the vine a support with enough height and anchoring to handle rapid, coarse growth rather than relying on a light ornamental obelisk. Consistent moisture matters during dry spells, and very hot weather can reduce pod set. Keep the trellis accessible so regular picking is practical; frequent harvest helps sustain flowering and pod production through the season.[1][3]
Editorial content updated 2026-07-20.