Burdock in Zone 9a & 9b
Arctium lappa
When to plant burdock in zone 9b
Zones 9a and 9b share the same average frost dates in our data, so this page covers both.
Method: Direct sow: Direct-sow outside. Burdock doesn't transplant well, or doesn't need the extra time indoors.
| Start indoors | Not typically started indoors |
|---|---|
| Direct sow / transplant outside | Feb 22–Mar 1 |
| Estimated harvest | Jun 22–Jun 29 (~120 days after direct-sowing) |
Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 2-4 ft.
Burdock is a long-rooted Asian specialty root vegetable, grown for its mild, slightly sweet root rather than for anything happening above ground.
How burdock fits zone 9's season
Zone 9b's frost-free window runs about 293 days, from February 15 to December 5. Burdock needs about 120 days from sowing to first harvest.
Good companions
No standout companions recorded yet for Burdock.
Where to buy burdock seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing burdock" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 9b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Burdock in USDA zone 9b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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