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Depth to Plant
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Spacing Between Plants |
Spacing Between Rows |
Days to Germinate (Sprout)
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Germination
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Planting Season
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Plant Height |
No. of Plants per sq. ft.
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Soil Requirements
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Shop Watermelon Seeds |
1/4" deep |
Space plants about 2' - 3" apart |
Make rows/hills about 5' apart |
5 - 7 days | 70F - 95F | Spring Summer |
Appx. 12" tall | 1/2 plant per sq. ft. | Prefers soil with pH levels of 6.0 - 7.5. |
Getting Started with Watermelon Growing
Growing watermelons in your garden can be rewarding when you understand their basic needs. These warm-season crops thrive in full sunlight and well-draining soil rich in organic matter. Begin by selecting a sunny spot that receives at least six to eight hours of direct sunlight daily, as watermelons are heavy feeders that rely on consistent warmth to develop their sweet flavor.
Soil Preparation and Planting
Prepare your soil before planting by working in compost or aged manure to improve drainage and nutrient content. Watermelons prefer slightly acidic to neutral soil with a pH between 6.0 and 7.0. Plant watermelon seeds or transplants after the last frost date when soil temperatures reach at least 70°F. Space plants about three to five feet apart to allow room for vine growth, and plant in mounds or raised rows to promote drainage.
Watering and Feeding
Water consistently throughout the growing season, aiming for about one to two inches per week depending on rainfall and temperature. Watermelons have shallow root systems, so regular, deep watering is more effective than frequent light watering. Apply mulch around plants to retain moisture and regulate soil temperature. Feed plants every two to three weeks with a balanced fertilizer, then switch to a lower-nitrogen formula once flowering begins to encourage fruit development rather than excessive vine growth.
Managing Pests and Disease
Monitor your watermelon patch regularly for common pests like cucumber beetles and spider mites. Use row covers early in the season to protect young plants, and remove covers once flowering starts to allow pollination. Watch for fungal diseases by ensuring good air circulation and avoiding overhead watering. Remove any diseased leaves promptly and consider organic pest control methods if needed.
Harvesting Your Watermelons
Watermelons typically mature 70 to 100 days after planting, depending on variety and growing conditions. Look for a creamy yellow spot on the bottom where the melon rests on the ground, and listen for a hollow sound when you tap the fruit. The tendril nearest the stem should be brown and dry when the melon is ripe. Harvest by cutting the stem with a knife rather than pulling the fruit to avoid damaging the vine.
