Growing Watermelon

Best Planting Times for Watermelon in Delaware

Planting MethodActivityRecommended Dates
Outdoor PlantingIndoor Seed StartingApril 1 – May 1
Transplant OutdoorsMay 15 – June 1
Greenhouse PlantingYear-roundAdjust planting based on temperature control in the greenhouse

Planting Conditions

Watermelon Planting Conditions

Delaware experiences a humid subtropical climate, which is ideal for watermelon cultivation. Warm temperatures and consistent rainfall during the growing season promote rapid growth and fruit development.


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Useful Tools for Starting Watermelon 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 watermelons the best chance to thrive from the very beginning.
5 pack of different Watermelon Seeds
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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.
Planting Trays Image
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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.
Grow Lights Image
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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.
Seed Starting Soil Image
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Greenhouse Growing

In Delaware, using a greenhouse offers multiple benefits. It extends the growing season, especially in early spring and late fall, protecting watermelons from unexpected frost or heavy rains. A greenhouse allows for better control of the environment, minimizing pests and diseases while promoting healthy growth.

Consider investing in a 10×12 FT Greenhouse priced at $1,199 to ensure your watermelons thrive in a controlled environment.
Greenhouse Image 1
Greenhouse Image 2
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Fertilizer

For optimal watermelon growth in Delaware, supplementing with fertilizer can ensure abundant and healthy harvests. Quality fertilizer helps replenish nutrients in the soil and promotes vigorous plant growth.
Fertilizer Image
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Plant watermelons outdoors in Delaware approximately 1-2 weeks after the last spring frost date, ensuring the soil is warm enough for optimal growth.

Average Last Frost Dates for Delaware’s Major Cities

CityAverage Last Frost Date
WilmingtonApril 15
DoverApril 20
NewarkApril 18
BearApril 21
HarringtonApril 25

Disclaimer: Frost dates are average estimates, and actual conditions may vary. It is recommended to monitor local forecasts and adapt planting decisions accordingly.

Other planting guides for Delaware:


Kale Planting in Delaware


Pumpkin Planting in Delaware


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