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🥔 Growing Radish in Zone 4b
Zone 4b has cold winters and a moderate growing season. Timing is key for Radish in this zone. Last frost: May 1. First frost: Oct 5.
Planting Calendar
Season: May 1 – Oct 5 (157 days) · Succession: plant every 2 weeks (up to 9x)
When to Plant Radish in Zone 4b
Sow Seeds Outdoors: Mar 27
Direct sow Radish seeds outdoors around Mar 27. Soil temperature should be at least 40°F. Space at 16/sqft (3" apart).
Harvest: Apr 21
First harvest approximately Apr 21 (~25 days from planting). Continue harvesting until first frost (Oct 5).
Fall Planting: Aug 31
For a fall harvest, plant Radish around Aug 31 (5 weeks before first frost).
Companion Planting
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 Radish in Zone 4b?
Direct sow Radish outdoors around Mar 27. Harvest around Apr 21.
What is the last frost date for Zone 4b?
The average last spring frost date for Zone 4b is May 1. The first fall frost averages Oct 5, giving a 157-day growing season.
Can I grow Radish in Zone 4b?
Yes. Radish needs 25 days to harvest. Zone 4b has a 157-day growing season, which is sufficient. You can plant up to 9 successions.
What is the best month to plant Radish in Zone 4b?
The best time to plant Radish in Zone 4b is around Mar 27, when soil temperatures are suitable and frost risk has passed.
What companion plants grow well with Radish?
Good companion plants for Radish include Nasturtiums, Spinach, Lettuce, Peas. Avoid planting Radish near Hyssop.
How long does Radish take to harvest?
Radish takes approximately 25 days from planting to harvest. In Zone 4b, expect your first harvest around Apr 21.
Plan Your Radish Garden
Track Radish from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
Start Free Radish Growing Guide