When to Plant Milk Thistle in Zone 7
In USDA zone 7a, plant outdoors April 29 to September 26, and expect your first harvest around September 26. (7a shown here — see 7a and 7b dates separately below.)
Milk Thistle planting calendar for USDA Zone 7a
Average last spring frost
April 15
Average first fall frost
October 20
Direct sow
Apr 29
Projected first harvest
Sep 26
Milk Thistle is ready to harvest in about 150 days, needing roughly 188 frost-free days in zone 7a.
Milk Thistle planting calendar for USDA Zone 7b
Average last spring frost
April 10
Average first fall frost
October 30
Direct sow
Apr 24
Projected first harvest
Sep 21
Milk Thistle is ready to harvest in about 150 days, needing roughly 203 frost-free days in zone 7b.
Not sure whether you're in 7a or 7b? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
1 variety of milk thistle in the HomeSown library. Tap any for its full grow guide.
Common problems with milk thistle
What to watch for, with identification and treatment for each
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