When to Plant Radishes in New Jersey
The fastest vegetable in the garden — some varieties are ready in just 25 days. Perfect for impatient gardeners and kids.
The Short Answer
New Jersey Frost Dates
Your planting dates depend on which part of New Jersey you're in. Here are the frost date ranges by region:
| Region | Zones | Last Frost (Spring) | First Frost (Fall) |
|---|---|---|---|
| Northern New Jersey | 6a, 6b | Apr 20 - May 5 | Oct 5 - Oct 20 |
| Central New Jersey | 6b, 7a | Apr 10 - Apr 25 | Oct 15 - Nov 1 |
| Southern New Jersey | 7a, 7b | Apr 1 - Apr 15 | Oct 20 - Nov 5 |
Radishes Planting Schedule for New Jersey
Northern New Jersey (Zones 6a, 6b)
Average last frost: Apr 20 - May 5 · Average first frost: Oct 5 - Oct 20
Central New Jersey (Zones 6b, 7a)
Average last frost: Apr 10 - Apr 25 · Average first frost: Oct 15 - Nov 1
Southern New Jersey (Zones 7a, 7b)
Average last frost: Apr 1 - Apr 15 · Average first frost: Oct 20 - Nov 5
Growing Radishes in New Jersey
Radishes in New Jersey's Climate
Radishes are the instant-gratification crop of spring. Direct sow 4 weeks before last frost and succession plant every 2 weeks through May. They bolt and turn pithy once temperatures exceed 80°F consistently. Resume sowing in September for fall harvest. Great for kids and first-time gardeners.
Soil Considerations for New Jersey
Sandy soils in Pine Barrens. Clay in north. Acidic in south. Rich loam in central agricultural areas. The Garden State for good reason. Loose, well-drained soil is especially important for radishes since the edible portion grows underground. If your soil is heavy clay, consider raised beds.
New Jersey Climate & Growing Season
Moderate climate with maritime influence. Good growing season. Four seasons. Excellent for a wide range of crops. Radishes can handle frost well, which is an advantage in New Jersey's climate. You can push planting dates earlier in spring and extend into fall.
Growing season length varies across New Jersey: Northern New Jersey (6a, 6b) has a last frost around Apr 20 - May 5, while Southern New Jersey (7a, 7b) sees frost end around Apr 1 - Apr 15. This difference matters for radishes — but radishes handle frost well, so the timing difference is less critical.
Growing Tips
Don't let them stay in the ground too long — they get pithy and hot. Succession plant every 2 weeks for continuous harvest.
Companion Planting
Plant radishes alongside these companions for better growth:
The Bottom Line
Last reviewed: March 29, 2026