When should I plant Black Radish in Zone 1b?

Direct sow Black Radish outdoors around Apr 20. Harvest around Jun 19.

What is the last frost date for Zone 1b?

The average last spring frost date for Zone 1b is May 25. The first fall frost averages Aug 28, giving a 95-day growing season.

Can I grow Black Radish in Zone 1b?

Yes. Black Radish needs 60 days to harvest. Zone 1b has a 95-day growing season, which is sufficient. You can plant up to 2 successions.

Growing Black Radish in Zone 1b

Zone 1b has harsh winters and a short growing season. Start Black Radish early indoors to maximize your harvest window. Last frost: May 25. First frost: Aug 28.

Planting Calendar

Outdoor

Harvest

Apr 20Aug 28

Season: May 25 – Aug 28 (95 days) · Succession: plant every 2 weeks (up to 2x)

Zone1b

Last FrostMay 25

First FrostAug 28

Season Length95 days

Days to Harvest60

SunFull Sun

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Black Radish in Zone 1b

Sow Seeds Outdoors: Apr 20

Direct sow Black Radish seeds outdoors around Apr 20. Soil temperature should be at least 40°F. Space at 4/sqft (6" apart).

Harvest: Jun 19

First harvest approximately Jun 19 (~60 days from planting). Continue harvesting until first frost (Aug 28).

Fall Planting: Jul 24

For a fall harvest, plant Black Radish around Jul 24 (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.

Start Free Black Radish Growing Guide