When to Plant Rhubarb in Zone 4
In USDA zone 4, plant outdoors May 15 to May 29, and expect your first harvest around May 29.
Rhubarb planting calendar for USDA Zone 4
Direct sow
May 15
Projected first harvest
May 29
Most rhubarb mature in about 14 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 rhubarb
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 rhubarb need about 14 days to mature.
Varieties to grow
2 varieties of rhubarb in the HomeSown library. Tap any for its full grow guide.
Common problems with rhubarb
What to watch for, with identification and treatment for each
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