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.

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.

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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.

Outdoor

Harvest

Mar 27Oct 5

Season: May 1 – Oct 5 (157 days) · Succession: plant every 2 weeks (up to 9x)

Zone4b

Last FrostMay 1

First FrostOct 5

Season Length157 days

Days to Harvest25

SunFull Sun

Frost ToleranceLight

Spacing16/sqft (3" apart)

Direct sow Radish seeds outdoors around Mar 27. Soil temperature should be at least 40°F. Space at 16/sqft (3" apart).

First harvest approximately Apr 21 (~25 days from planting). Continue harvesting until first frost (Oct 5).

For a fall harvest, plant Radish around Aug 31 (5 weeks before first frost).

✅ Nasturtiums✅ Spinach ✅ Lettuce✅ Peas

❌ Hyssop

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

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