Planting Dates for Delaware
Delaware's coastal plain location provides a moderate climate with a generous growing season. The state's rich agricultural heritage includes excellent conditions for a wide range of vegetables.
USDA Zones 7a-7b • 180-210 frost-free days depending on location
Frost Dates in Delaware
Average last spring frost and first fall frost dates for Delaware cities. Use these to calculate your planting windows.
| City | Last Spring Frost | First Fall Frost | Frost-Free Days | USDA Zone |
|---|---|---|---|---|
| Wilmington | Apr 13 | Oct 23 | 193 | 7a |
| Dover | Apr 8 | Oct 28 | 203 | 7b |
Gardening Tips for Delaware
- ✓Southern Delaware enjoys one of the longest growing seasons in the Mid-Atlantic.
- ✓Sandy coastal soils warm up quickly in spring — great for early planting.
- ✓Start cool crops outdoors as early as mid-March in most areas.
- ✓Amend sandy soils with compost to improve water retention.
What to Plant in Delaware
Cold-Hardy Crops (plant early)
These crops tolerate frost and can be planted 2-6 weeks before your last frost date.
30-60 days from sowing
55-70 days from sowing
60-80 days from sowing
50-70 days from sowing
55-80 days from transplant
35-50 days from sowing
20-35 days from sowing
July-August the following year
90-120 days from transplant
70-120 days from planting
50-70 days from sowing
50-60 days from sowing
Warm-Season Crops (plant after last frost)
Start these indoors and transplant after all frost danger has passed.
60-85 days from transplant
60-90 days from transplant
50-65 days from sowing
50-65 days from sowing
45-60 days from sowing
60-100 days from sowing
30-60 days from sowing
Get Exact Planting Dates for Delaware
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Frequently Asked Questions
When is the last frost date in Delaware?
Last frost dates in Delaware vary by city: Wilmington (Apr 13), Dover (Apr 8).
What USDA hardiness zones are in Delaware?
Delaware spans USDA hardiness zones 7a-7b. Your specific zone determines which perennials survive winter and when to start planting annuals.
What vegetables grow best in Delaware?
Hardy crops like peas, kale, spinach, and garlic thrive across Delaware. In warmer zones, tomatoes, peppers, and cucumbers do well with proper timing. Use our free calculator for exact planting dates.
How long is the growing season in Delaware?
180-210 frost-free days depending on location. Extend your season with cold frames, row covers, and indoor seed starting.
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