How to Grow Crimson Sweet Watermelons

Episode #6 Crimson Sweet Watermelon

What are Crimson Sweet Watermelons?

Crimson sweet watermelons, scientifically known as Citrullus lanatus, are a variety of watermelon prized for their vibrant red flesh and superior sweetness. These melons typically grow to a substantial size, weighing between 16 and 25 pounds, with a oblong or oval shape and a hard, striped rind. When ripe, the flesh boasts an intense crimson color and a deliciously sweet, almost candied flavor.

History and Origins

Crimson sweet watermelons were first developed in the 1960s by Charles Pollard and W.P. “Pappy” Wier at the Kansas State University. They crossed a Charleston Gray watermelon with a small, sweet melon from Taiwan, creating a hybrid that combined the best traits of both parents – the size and thick rind of the Charleston Gray, and the exceptional sweetness of the Taiwanese melon.

Nutritional Benefits

Not only are crimson sweet watermelons a taste sensation, but they are also packed with essential nutrients. Here’s a breakdown of their nutritional value:

• High in Vitamin C: One cup of watermelon contains over 20% of the recommended daily intake of vitamin C, a powerful antioxidant that supports immune function.
• Rich in Lycopene: The deep red color of the flesh is due to the presence of lycopene, an antioxidant that may help reduce the risk of certain types of cancer and heart disease.
• Hydrating: Watermelons are composed of over 90% water, making them an excellent source of hydration, especially during hot summer days.
• Low in Calories: Despite their sweetness, watermelons are relatively low in calories, with only 46 calories per cup.

Growing Conditions for Crimson Sweet Watermelons

Crimson sweet watermelons thrive in warm, sunny conditions with well-drained soil. Here are the specific requirements for optimal growth.

Climate and Temperature Requirements

These watermelons prefer a long, hot growing season with daytime temperatures ranging from 70°F to 95°F (21°C to 35°C). They cannot tolerate frost or freezing temperatures, which can damage or kill the plants. In most regions, it’s best to plant them after the last expected frost in spring.

Soil Preparation and Requirements

Crimson sweet watermelons grow best in well-drained, sandy loam soil with a pH between 6.0 and 6.8. Before planting, work in aged compost or well-rotted manure to improve soil fertility and drainage. If your soil is heavy or clay-based, consider raised beds or mounds to ensure proper drainage.

Planting Crimson Sweet Watermelons

With the right preparation, planting crimson sweet watermelons is a straightforward process.

Seed Selection and Germination

Look for high-quality seeds from reputable suppliers. Crimson sweet watermelon seeds can be started indoors 4 to 6 weeks before the last expected frost date in your area. Sow the seeds 1 inch deep in seed trays or pots filled with a well-draining seed-starting mix. Keep the soil moist and warm (around 80°F or 27°C) until the seeds germinate, which usually takes 7 to 10 days.

Transplanting and Spacing

Once the seedlings have developed their first true leaves and the risk of frost has passed, it’s time to transplant them outdoors. Choose a sunny location and space the plants 6 to 8 feet apart in rows spaced 8 to 10 feet apart. This spacing allows room for the vines to spread and the fruits to develop properly.

Care and Maintenance

After planting, proper care and maintenance are essential for a bountiful crimson sweet watermelon harvest.

Watering and Irrigation

Crimson sweet watermelons have deep roots and require consistent moisture throughout the growing season. Water the plants deeply, ensuring the soil is moist to a depth of at least 6 inches. Avoid overhead watering, as this can promote fungal diseases. Instead, use a soaker hose or drip irrigation system to water directly at the base of the plants.

Pest and Disease Management

Like any crop, crimson sweet watermelons are susceptible to various pests and diseases. Here are some common issues to watch out for and how to manage them:

Pests:

• Aphids: These small, soft-bodied insects can be controlled with insecticidal soap or neem oil.
• Cucumber Beetles: Use row covers or apply organic pesticides like pyrethrin or spinosad.
• Squash Vine Borers: Monitor for entry holes and remove affected vines. Use pheromone traps or apply beneficial nematodes.

Diseases:

• Powdery Mildew: Avoid overhead watering and maintain good air circulation. Apply fungicides containing sulfur or potassium bicarbonate.
• Fusarium Wilt: Rotate crops and use disease-resistant varieties. Remove and destroy infected plants.
• Anthracnose: Practice crop rotation and remove infected plant debris. Apply fungicides containing copper or chlorothalonil.

Pruning and Trellising

While not strictly necessary, pruning and trellising can help maximize yields and improve fruit quality. Prune off excess vines and remove any damaged or diseased foliage. Trellising the vines vertically can improve air circulation, reduce disease risk, and make harvesting easier.

Harvesting and Storage

With proper care, your crimson sweet watermelons will be ready for harvesting in about 90 to 100 days after planting.

Signs of Maturity and Ripeness

Here are a few signs to look for to determine when your watermelons are ripe and ready for harvest:

• The underside of the melon, where it rests on the ground, develops a creamy or yellowish color.
• The curly tendril nearest the stem turns brown and dries up.
• The rind develops a dull, waxy appearance and becomes difficult to pierce with your thumbnail.
• The melon produces a hollow sound when tapped gently.

Harvesting Techniques

When harvesting, use a sharp knife or pruning shears to cut the stem about 2 inches from the melon. Avoid pulling or twisting the melons off the vine, as this can damage the plants. Gently lift the melons and place them in a shaded area to prevent sunburn.

Storage and Preservation

Uncut crimson sweet watermelons can be stored at room temperature for up to 2 weeks. For longer storage, refrigerate whole melons at around 55°F (13°C) for up to 3 weeks. Once cut, wrap the melon tightly in plastic wrap or place it in an airtight container and refrigerate for up to 5 days.

Conclusion

Growing crimson sweet watermelons can be a rewarding experience, allowing you to enjoy the unmatched sweetness and vibrant color of this iconic summer fruit. With the right climate, soil preparation, and care, you’ll be able to savor the juicy, crimson flesh of your homegrown watermelons all season long. So why not give it a try and experience the true taste of summer in your own backyard?