When to Plant Marshmallow in Zone 3
In USDA zone 3, start seeds indoors around April 4, transplant or plant outdoors June 13 to October 11, and expect your first harvest around October 11.
Marshmallow planting calendar for USDA Zone 3
Start seeds indoors
Apr 4
Transplant outdoors
Jun 13
Projected first harvest
Oct 11
Marshmallow is ready to harvest in about 120 days. Dates use USDA zone 3a average frost dates. Set your ZIP in HomeSown for dates tuned to your exact location.
What zone 3 means for marshmallow
Average last spring frost
May 30
Average first fall frost
September 10
Those two dates are what set the schedule above. Zone 3 gives you roughly 103 frost-free days, and marshmallow need about 120 days to mature.
Varieties to grow
1 variety of marshmallow in the HomeSown library. Tap any for its full grow guide.
Common problems with marshmallow
What to watch for, with identification and treatment for each
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