Scarlet Runner Bean

Frost Tolerance: Does not take any frost or extended cold temperatures, the root can be dugged out in the fall and replanted in the spring.

Sun Exposure: Full sun

Origin: Central America and Mexico, in high elevation mountains

Growth Habits: Large perennial climbing plant, generally grown as annual, rapidly growing up to 12 to 15 feet tall (3.5-4.5 m); trifoliate leaves, broad-oval leaflets, 4 to 5 inches long (10-12.5 cm).

Watering Needs: Regular water

Propagation: Seeds, after the soil temperature exceeds 50ºF (10ºC).

The pods are edible when young, shorter than 5 inches long (12 cm). The young shelled beans, still pink, can be used as lima beans. The starchy roots and the flowers are also edible. The mature seeds are not generally eaten.

Blooming Habits:
Large scarlet bean-like flowers, up to 1 inch wide (2.5 cm), attractive to the hummingbirds. 'White Dutch Runner' and 'Case Knife' are cultivars with white flowers.

Fruiting Habits:
They don't like the hot weather, and generally stop producing pods when the temperature is above 90°F (32°C). The mature seed is mottled black and red.