Scarlet Runner Bean plant profile
Phaseolus coccineus
An annual flower for full sun.
Last updated .
When to plant
When to plant Scarlet Runner Bean
Scarlet runner bean is a fast annual twining vine grown for its showy scarlet flowers from mid-summer to frost (NC State: summer) and its edible green-to-purple pods; the flowers themselves are edible. Direct sow outdoors after the danger of frost has passed, in full sun with average moisture and good drainage; the pollen is not viable when temperatures rise above 90F, so very hot spells can reduce pod set.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Scarlet Runner Bean in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Full sun
- Lifecycle
- Annual
Common problems
Watch for these
Also watch for: raw beans toxic, poor set above 90f.
Next steps
Continue with Scarlet Runner Bean
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Phaseolus coccineus (Scarlet Runner Bean, Runner Bean, Multiflora Bean)
North Carolina Extension Gardener Plant Toolbox (NC State Extension). Supports general reference. Checked 2026-06-18.