When should I plant Black Radish in Zone 9b?

Direct sow Black Radish outdoors around Feb 3. Harvest around Apr 4.

What is the last frost date for Zone 9b?

The average last spring frost date for Zone 9b is Mar 10. The first fall frost averages Nov 15, giving a 250-day growing season.

Yes. Black Radish needs 60 days to harvest. Zone 9b has a 250-day growing season, which is sufficient. You can plant up to 13 successions.

Zone 9b has warm winters and an extended growing season — excellent for heat-loving crops like Black Radish. Last frost: Mar 10. First frost: Nov 15.

Outdoor

Harvest

Feb 3Nov 15

Season: Mar 10 – Nov 15 (250 days) · Succession: plant every 2 weeks (up to 13x)

Zone9b

Last FrostMar 10

First FrostNov 15

Season Length250 days

Days to Harvest60

SunFull Sun

Frost ToleranceLight

Spacing4/sqft (6" apart)

Direct sow Black Radish seeds outdoors around Feb 3. Soil temperature should be at least 40°F. Space at 4/sqft (6" apart).

First harvest approximately Apr 4 (~60 days from planting). Continue harvesting until first frost (Nov 15).

For a fall harvest, plant Black Radish around Oct 11 (5 weeks before first frost).

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