When to Plant Rhubarb in Zone 9
In USDA zone 9a, plant outdoors March 1 to March 15, and expect your first harvest around March 15. (9a shown here — see 9a and 9b dates separately below.)
Rhubarb planting calendar for USDA Zone 9a
Average last spring frost
March 1
Average first fall frost
December 1
Direct sow
Mar 1
Projected first harvest
Mar 15
Most rhubarb mature in about 14 days, needing roughly 275 frost-free days in zone 9a.
Rhubarb planting calendar for USDA Zone 9b
Average last spring frost
February 15
Average first fall frost
December 15
Direct sow
Feb 15
Projected first harvest
Mar 1
Most rhubarb mature in about 14 days, needing roughly 303 frost-free days in zone 9b.
Not sure whether you're in 9a or 9b? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
2 varieties of rhubarb in the HomeSown library. Tap any for its full grow guide.
Common problems with rhubarb
What to watch for, with identification and treatment for each
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