Growing Black Radish in Zone 9b
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.
Planting Calendar
Season: Mar 10 – Nov 15 (250 days) · Succession: plant every 2 weeks (up to 13x)
When to Plant Black Radish in Zone 9b
Sow Seeds Outdoors: Feb 3
Direct sow Black Radish seeds outdoors around Feb 3. Soil temperature should be at least 40°F. Space at 4/sqft (6" apart).
Harvest: Apr 4
First harvest approximately Apr 4 (~60 days from planting). Continue harvesting until first frost (Nov 15).
Fall Planting: Oct 11
For a fall harvest, plant Black Radish around Oct 11 (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 13bFrequently Asked Questions
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.
Can I grow Black Radish in Zone 9b?
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.
What is the best month to plant Black Radish in Zone 9b?
The best time to plant Black Radish in Zone 9b is around Feb 3, when soil temperatures are suitable and frost risk has passed.
How long does Black Radish take to harvest?
Black Radish takes approximately 60 days from planting to harvest. In Zone 9b, expect your first harvest around Apr 4.
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