When to Plant Watercress in Zone 9
In USDA zone 9a, plant outdoors February 15 to April 6, and expect your first harvest around April 6. (9a shown here — see 9a and 9b dates separately below.)
Watercress planting calendar for USDA Zone 9a
Average last spring frost
March 1
Average first fall frost
December 1
Direct sow
Feb 15
Projected first harvest
Apr 6
Watercress is ready to harvest in about 50 days, needing roughly 275 frost-free days in zone 9a.
Watercress planting calendar for USDA Zone 9b
Average last spring frost
February 15
Average first fall frost
December 15
Direct sow
Feb 1
Projected first harvest
Mar 23
Watercress is ready to harvest in about 50 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
1 variety of watercress in the HomeSown library. Tap any for its full grow guide.
Common problems with watercress
What to watch for, with identification and treatment for each
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