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When to plant radishes

Sow radishes outdoors 2 to 4 weeks before the last frost and plant again for fall 4 to 10 weeks before the first fall frost.

Your dates for radishes

Set your ZIP code at the top of the page and we will work out when to plant radishes where you live, from the frost records of the nearest NOAA weather station. Your ZIP code is remembered on this device only.

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Radishes planting dates by zone

JFMAMJJASOND Zone 4b Zone 5b Zone 6b Zone 7b Zone 8b Zone 9a
Sow outdoorsFirst harvestFall plantingDates use each zone's typical frost dates. Enter your ZIP code for your own.
Dates from each zone's typical (median) frost dates.
ZoneSow outdoorsFall planting
Zone 2aApr 21 to May 5Jun 27 to Aug 8
Zone 3aApr 28 to May 12Jul 6 to Aug 17
Zone 3bApr 19 to May 3Jul 16 to Aug 27
Zone 4aApr 15 to 29Jul 20 to Aug 31
Zone 4bApr 10 to 24Jul 23 to Sep 3
Zone 5aApr 5 to 19Jul 26 to Sep 6
Zone 5bApr 3 to 17Aug 1 to Sep 12
Zone 6aApr 1 to 15Aug 8 to Sep 19
Zone 6bMar 26 to Apr 9Aug 13 to Sep 24
Zone 7aMar 19 to Apr 2Aug 16 to Sep 27
Zone 7bMar 8 to 22Aug 23 to Oct 4
Zone 8aMar 1 to 15Aug 29 to Oct 10
Zone 8bFeb 17 to Mar 3Sep 4 to Oct 16
Zone 9aFeb 2 to 16Sep 17 to Oct 29
Zone 9bJan 3 to 17Sep 30 to Nov 11

Spring dates before the last frost assume the soil has thawed and is dry enough to work. After a late or wet spring, wait for that even if the date has passed.

Where frost is rare

In frost-rare climates, radishes are sown from fall through early spring. Summer heat makes them bolt, crack and taste hot, so skip midsummer sowings.

ZonePlanting months in Extension guides
Zone 9Sep-Mar (North Florida); Sep-Apr (Phoenix area, AZ)
Zone 10Sep-Mar (Central Florida); Sep-mid Feb (Lower Rio Grande Valley, TX)
Zone 11Oct-Mar (South Florida)

Based on UF/IFAS Florida Vegetable Gardening Guide VH021 Table 1 (North FL ~8b-9a -> zone_9, Central FL ~9b-10a -> zone_10, South FL ~10b-11 -> zone_11); University of Arizona AZ1005 Maricopa County calendar; Texas A&M AgriLife Cameron County Lower Rio Grande Valley guide. Warm-winter areas are matched to zones approximately, so use the months for your region.

How to grow radishesYour full planting calendar

Sources