Best Planting Times for Kale in Delaware
Planting Method | Activity | Recommended Dates |
---|---|---|
Outdoor Planting | Indoor Seed Starting | February 15 – March 15 |
Transplant Outdoors | April 1 – May 1 | |
Fall Planting | Direct Sow Outdoors | August 1 – September 1 |
Planting Conditions
Delaware experiences a humid subtropical climate with hot summers and mild winters, placing it within USDA Hardiness Zones 7a to 7b. This makes it an excellent state for growing cool-season crops like kale, especially during the fall and early spring.
Plant kale outdoors approximately 4-6 weeks before the last frost in spring, and 6-8 weeks before the first frost in fall.
Average Last Frost Dates for Delaware’s Largest Cities
City | Average Last Frost Date |
---|---|
Wilmington | April 18 |
Dover | April 12 |
Newark | April 16 |
Middletown | April 14 |
Smyrna | April 14 |
Milford | April 12 |
Seaford | April 10 |
Georgetown | April 8 |
Elsmere | April 17 |
New Castle | April 16 |
Average First Frost Dates for Delaware’s Largest Cities
City | Average First Frost Date |
---|---|
Wilmington | October 26 |
Dover | October 25 |
Newark | October 26 |
Middletown | October 24 |
Smyrna | October 24 |
Milford | October 22 |
Seaford | October 21 |
Georgetown | October 20 |
Elsmere | October 25 |
New Castle | October 26 |
Please note: These dates are averages and can vary from year to year. It is always a good idea to monitor local weather forecasts and consider your specific location and microclimate when planning your gardening activities.
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Useful Tools for Starting Kale Indoors
Using the right tools can save you time and increase your success rate.
Seeds
Quality seeds lead to better germination and healthier plants. Starting with high-quality seeds gives your kale the best chance to thrive from the very beginning.
Browse Kale Seeds on Amazon
Planting Trays
Planting trays help you organize your seedlings and ensure they have enough space to grow before you transplant them outdoors. This makes the process more efficient and increases the chances of strong, healthy plants.
Find Planting Trays on Amazon
Grow Lights
Grow lights are essential if you don’t have enough natural sunlight. They provide your seedlings with the light they need to grow strong and healthy, even in less-than-ideal conditions.
Check out Grow Lights on Amazon
Seed Starting Soil
Using light, fine soil specifically designed for seed starting helps young roots establish quickly and promotes healthy growth. It’s an easy way to give your seedlings the best start possible.
Get Seed Starting Soil on Amazon
Garden Tools and Fertilizer
Garden Trowel
A garden trowel is a handy tool that makes transplanting your seedlings easier and more precise, ensuring that each plant is placed at the right depth without damaging the roots.
Shop Garden Trowels on Amazon
Soil and Fertilizer
Fertilizer is essential for enhancing growth, especially if your soil is nutrient-poor. By enriching the soil, you give your kale plants the nutrients they need to grow robust and produce a bountiful harvest.
Explore Fertilizer on Amazon
Other planting guides for Delaware:
Any questions on growing kale? Visit our forum to discuss: Growing Kale
Starting Kale Indoors
In areas like Wilmington (Zone 7a), start kale seeds indoors from February 15 to March 15. This timing ensures that seedlings are ready for outdoor transplanting from early April to early May, well before the summer heat.
Transplanting Kale Seedlings
Transplant seedlings outdoors from April 1 to May 1, ensuring soil temperatures are consistently above 45°F. Space seedlings 12-18 inches apart in rows at least 18 inches apart to allow for good air circulation and sunlight exposure.
General Care and Maintenance
Watering:
- Water deeply and consistently to keep the soil evenly moist. Delaware’s warm summers can dry out the soil quickly, so regular watering is essential.
- Water at the base of the plants to prevent wetting the foliage, which helps reduce the risk of fungal diseases.
Fertilizing:
- Apply a balanced fertilizer at planting and again when the leaves begin to develop. Adding compost to the soil before planting can improve fertility and soil structure.
Pest and Disease Management:
- Monitor for common pests like aphids, flea beetles, and cabbage worms. The humid climate can also encourage fungal diseases, so vigilance is necessary.
- Use organic or integrated pest management strategies to protect your plants from pests and diseases.
Harvesting Kale:
- Harvest kale leaves when they are large enough to eat but still tender. Regular harvesting encourages new growth and can extend the season, particularly in Delaware’s favorable growing conditions.
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