How to Grow Yardlong Bean: Planting, Spacing, Care & Harvest
Quick answer
Direct sow after all frost danger / after soils have warmed thoroughly in late spring (UF/Clemson). Frost-tender. Harvest pods about 10–12 inches while tender.
Yardlong bean at a glance
Weeks relative to last frost (LF). Colored weeks show when our ZIP planner schedules each step.
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Planting dates for your ZIP: the ZIP planting planner counts each window from your local frost dates.
Organic pests and diseases: see also organic pest control. Use any product as the label directs.
Warm-season climber: intolerant of cold (Clemson/NC). Needs a sturdy trellis.
Planting timing
UF Gardening Solutions: wait until all danger of frost has passed. (UF cool beans) Clemson Chinese vegetables: “Plant seed ½ to 1 inch deep and three inches apart after soils have warmed thoroughly in late spring.” (Clemson Chinese vegetables) NC: warm-season; intolerant of frost. (NC Vigna unguiculata)
Depth and spacing
Clemson: ½ to 1 inch deep; three inches apart. Provide a sturdy trellis.
Sun, soil and water
Full sun; warm soil. Even moisture once flowering and podding.
Care
Train vines on trellis early. Do not plant into cold soil.
Harvest
Harvest pods tender, best about 10 to 12 inches (Clemson); UF about 10–13 weeks after sowing. NC: about 12–14 inches, pencil-half diameter.
Pests and diseases
Cultural warmth and airflow first; bean-family pests possible in warm climates.
Related: all grow guides · ZIP planner · organic pest control
Frequently asked questions
When do I sow?
After frost / soils warmed thoroughly (UF/Clemson).
Trellis?
Yes — sturdy support required.
How long are pods at harvest?
About 10–12 inches while tender (Clemson/UF).
More grow guides: All grow guides
Sources
- UF/IFAS Extension: UF cool beans
- Clemson Cooperative Extension: Clemson Chinese vegetables
- NC State Extension: NC Vigna unguiculata