When to plant radishes in Zone 4

In Zone 4, the last spring frost usually passes around May 10 and the first fall frost arrives around September 21, leaving about 134 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.

Cool climate with a brief warm window. Indoor starts and season extension help.

Planting windows for radishes in Zone 4

The harvest estimate counts 28 days to maturity, then a picking window of about 10 days. These windows use typical frost dates for Zone 4; Dibble pins them to your exact ZIP code.

Get reminders for these exact dates

Dibble turns where your garden is into a full planting calendar and reminds you on the right day. Free to start, no account needed.

Radish in a Zone 4 season

Zone 4 gives about 134 frost-free days. Radish needs roughly 28 days from sowing. That leaves about 106 days of slack, so there is room for a late start or a second planting.

Sowing every 10 days, Zone 4 has room for about 11 plantings.

How to grow radishes

The fastest crop, ready in about a month. Sow in the cool part of the year and again every 10 days while it stays cool. Heat makes radishes woody and fiery, so skip the hottest months.

Companion plants

Good neighbors for Radish:

Radish in other zones

Not in Zone 4? Pick your zone for the same dated windows.

Keep exploring

Radish: the full growing guide · The Zone 4 planting calendar · Every crop and zone

Plant at the right time this season

Dibble builds your calendar in under a minute. Free to start, no account needed.

See all features

Dates are estimates based on typical frost dates for the zone. Your yard has its own microclimate, so use them as a starting point and adjust as you learn your space.