When should I plant Black Radish in Zone 3b?

Direct sow Black Radish outdoors around Apr 10. Harvest around Jun 9.

What is the last frost date for Zone 3b?

The average last spring frost date for Zone 3b is May 15. The first fall frost averages Sep 22, giving a 130-day growing season.

Can I grow Black Radish in Zone 3b?

Yes. Black Radish needs 60 days to harvest. Zone 3b has a 130-day growing season, which is sufficient. You can plant up to 5 successions.

Growing Black Radish in Zone 3b

Zone 3b has harsh winters and a short growing season. Start Black Radish early indoors to maximize your harvest window. Last frost: May 15. First frost: Sep 22.

Planting Calendar

Outdoor

Harvest

Apr 10Sep 22

Season: May 15 – Sep 22 (130 days) · Succession: plant every 2 weeks (up to 5x)

Zone3b

Last FrostMay 15

First FrostSep 22

Season Length130 days

Days to Harvest60

SunFull Sun

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Black Radish in Zone 3b

Sow Seeds Outdoors: Apr 10

Direct sow Black Radish seeds outdoors around Apr 10. Soil temperature should be at least 40°F. Space at 4/sqft (6" apart).

Harvest: Jun 9

First harvest approximately Jun 9 (~60 days from planting). Continue harvesting until first frost (Sep 22).

Fall Planting: Aug 18

For a fall harvest, plant Black Radish around Aug 18 (5 weeks before first frost).

Black Radish in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Plan Your Black Radish Garden

Track Black Radish from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

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