Hyacinth Bean Vine in Zone 3a & 3b
Lablab purpureus
When to plant hyacinth bean vine in zone 3b
Zones 3a and 3b 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 | Jun 20–Jun 27 |
| Estimated bloom | Sep 18–Sep 25 (~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 3's season
Zone 3b's frost-free window runs about 98 days, from May 30 to September 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 3b 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 3b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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