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Watermelon 'Crimson Sweet' Seed Pack

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Watermelons need heat for maximum sweetness, so plant when the soil is at least 70 degrees and pick a spot with at least 6 hours of sun per day.

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To reach maximum deliciousness, watermelons need heat. In the Pacific NW, that means taking some extra steps to bring big melons like 'Crimson Sweet' to maturity.

When starting seeds indoors, put two to three seeds per biodegradable pot, then thin to the strongest plant when leaves appear. Clipping out the weaker ones with scissors will avoid disturbing the roots. Using biodegradable pots will also reduce root disturbance. Remove the bottoms of the pots before transplanting.

Black plastic or weed barrier on the ground will help warm the soil, deter weeds, and retain moisture. Cut four to six inch holes in the plastic every four to six feet, then sow or transplant into holes when the soil is about 70 degrees.

Floating row covers will keep the seedlings a bit warmer and will protect them from some pests. Remove the covers when flowers appear.  

Watermelons need consistent moisture and fertilizer. Drip or soaker hoses under the plastic work well. In any case, keep water off the leaves.

Botanical Name Citrullus lanatus
Mature Size Vines 6' - 10' long, fruits 20 - 25 pound melons, 12" x 10"
Light Full sun
Cold Hardiness Frost sensitive annual
When to Sow Outside RECOMMENDED. 1 to 2 weeks after your average last frost date, and when soil temperature is 70°–90°F.
When to Start Inside Not recommended except in very short growing seasons, 2 to 4 weeks before transplanting.
Special Germination Instructions Roots are sensitive to disturbance; sow in biodegradable pots that can be planted directly into the ground. Transplant when soil temperature is at least 60°F.
Days to Emerge 5 - 10 days
Seed Depth 1/2"
Seed Spacing 2 - 3 seeds per mound
Row Spacing 4' - 6' apart
Thinning When 3 leaves, thin to 1 plant per mound
Maturity Date 85 days
When to Harvest (1) the bottom of the melon (on the soil) turns from light green to a yellowish color; (2) the surface color of the fruit turns dull; (3) the skin becomes resistant to penetration by the thumbnail.
Additional Info Harvest signs may not appear at same time.
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