Hyacinth Bean Vine in Zone 5a & 5b
Lablab purpureus
When to plant hyacinth bean vine in zone 5b
Zones 5a and 5b share the same average frost dates in our data, so this page covers both.
Method: Direct sow: Direct-sow outside. Hyacinth Bean Vine doesn't transplant well, or doesn't need the extra time indoors.
| Start indoors | Not typically started indoors |
|---|---|
| Direct sow / transplant outside | May 31–Jun 7 |
| Estimated bloom | Aug 29–Sep 5 (~90 days after direct-sowing) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 6-12 ft.
Hyacinth bean is a climbing vine, not a bush, and it needs to be treated that way from the start: this is a vigorous twiner that reaches 6-12 feet in a season and will look for the nearest support to grab onto, so a sturdy trellis has to be in place before or at planting, not added later as an afterthought.
How hyacinth bean vine fits zone 5's season
Zone 5b's frost-free window runs about 148 days, from May 10 to October 5. Hyacinth Bean Vine needs about 90 days from sowing to first harvest.
Good companions
No standout companions recorded yet for Hyacinth Bean Vine.
Where to buy hyacinth bean vine seeds
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See it growing
Search YouTube for "growing hyacinth bean vine" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 5b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Hyacinth Bean Vine in USDA zone 5b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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