When to Plant Milk Thistle in Zone 9
In USDA zone 9, plant outdoors March 15 to August 12, and expect your first harvest around August 12.
Milk Thistle planting calendar for USDA Zone 9
Direct sow
Mar 15
Projected first harvest
Aug 12
Milk Thistle is ready to harvest in about 150 days. Dates use USDA zone 9a average frost dates. Set your ZIP in HomeSown for dates tuned to your exact location.
What zone 9 means for milk thistle
Average last spring frost
March 1
Average first fall frost
December 1
Those two dates are what set the schedule above. Zone 9 gives you roughly 275 frost-free days, and milk thistle need about 150 days to mature.
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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