Vigorous tropical climbing legume with ornamental purple flowers and pods. Fast-growing summer cover crop and a vegetable in many cuisines, but raw beans are toxic.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 3–12 | −40 °C to 15.6 °C | Zones where it can be grown as an annual — not a frost-tolerance rating |
| RHS hardiness rating | H7 | down to −20 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 3–9 | −34 °C and warmer | Zones where it can be grown as an annual — not a frost-tolerance rating |
| Australian (ANBG) zone | Zone 1–7 | −15 °C and warmer | Zones where it can be grown as an annual — not a frost-tolerance rating |
As a tender annual, Lablab bean (Hyacinth bean) doesn't overwinter — the zone range shows where the growing season supports it. See the RHS rating for its actual cold tolerance.
Growing notes
- Raw beans are toxic — must be cooked thoroughly with water changes before eating
- Ornamental purple flowers and bicolour pods make it a common edible-ornamental for trellises
- Frost-tender — sow in warm soil after last frost
Categories
Related plants
Cross-check Lablab bean (Hyacinth bean) against your zones