When to Plant Borage in Zone 4
In USDA zone 4, plant outdoors May 1 to June 30, and expect your first harvest around June 30.
Borage planting calendar for USDA Zone 4
Direct sow
May 1
Projected first harvest
Jun 30
Borage is ready to harvest in about 60 days. Dates use USDA zone 4a average frost dates. Set your ZIP in HomeSown for dates tuned to your exact location.
What zone 4 means for borage
Average last spring frost
May 15
Average first fall frost
September 20
Those two dates are what set the schedule above. Zone 4 gives you roughly 128 frost-free days, and borage need about 60 days to mature.
Varieties to grow
1 variety of borage in the HomeSown library. Tap any for its full grow guide.
Common problems with borage
What to watch for, with identification and treatment for each
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