When should I plant Korean Radish in Zone 4a?

Direct sow Korean Radish outdoors around Mar 31. Harvest around May 25.

What is the last frost date for Zone 4a?

The average last spring frost date for Zone 4a is May 5. The first fall frost averages Oct 1, giving a 149-day growing season.

Yes. Korean Radish needs 55 days to harvest. Zone 4a has a 149-day growing season, which is sufficient. You can plant up to 6 successions.

Zone 4a has cold winters and a moderate growing season. Timing is key for Korean Radish in this zone. Last frost: May 5. First frost: Oct 1.

Outdoor

Harvest

Mar 31Oct 1

Season: May 5 – Oct 1 (149 days) · Succession: plant every 2 weeks (up to 6x)

Zone4a

Last FrostMay 5

First FrostOct 1

Season Length149 days

Days to Harvest55

SunFull Sun

Frost ToleranceLight

Spacing4/sqft (6" apart)

Direct sow Korean Radish seeds outdoors around Mar 31. Soil temperature should be at least 40°F. Space at 4/sqft (6" apart).

First harvest approximately May 25 (~55 days from planting). Continue harvesting until first frost (Oct 1).

For a fall harvest, plant Korean Radish around Aug 27 (5 weeks before first frost).

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