Tips for Growing Watermelon in North Carolina

By: Carolyn J. Vance

Tips for Growing Watermelon in North Carolina

Are you a watermelon lover living in North Carolina? If so, you’re in luck! North Carolina provides the perfect climate and conditions for growing delicious watermelons right in your own backyard. With a little bit of knowledge and some careful planning, you can enjoy juicy and refreshing watermelons all summer long.

Choosing the Right Varieties

Planting and Caring for Watermelon

Watermelons require plenty of sun, so make sure to choose a location in your garden that receives at least 6-8 hours of direct sunlight each day. They also require well-draining soil, so it’s a good idea to amend your soil with organic matter, such as compost, to improve drainage.

Protecting Your Watermelon Crop

One challenge that watermelon growers in North Carolina face is the threat of pests and diseases. To protect your watermelon crop, consider using row covers to keep out insects and pests. Additionally, practicing good sanitation in your garden can help reduce the risk of diseases.

Regularly inspect your plants for any signs of pests or diseases and take appropriate action if needed. This may include using organic insecticides or fungicides, or simply removing affected plants to prevent the spread of disease.

Harvesting and Enjoying Your Watermelon

Once your watermelon plants start producing fruit, it’s time to keep a close eye on them. Watermelons are ready to harvest when the underside turns creamy yellow and the tendrils near the fruit start to dry up. Give the watermelon a light tap – if it sounds hollow, it’s a good indication that it’s ready to be enjoyed.

When it comes to cutting open your watermelon, the possibilities are endless. Enjoy fresh slices on a hot summer day, blend it into a refreshing smoothie, or get creative with watermelon salads and desserts. The choice is yours, so go ahead and savor the sweet taste of your hard-earned watermelon harvest.

Choosing the Right Watermelon Varieties

Tips for Growing Watermelon in North Carolina

1. Seedless Watermelons

Tips for Growing Watermelon in North Carolina

Seedless watermelons are increasingly popular due to their convenience and improved texture. These varieties produce small, underdeveloped seeds that are almost imperceptible when eaten. Seedless watermelons can offer a sweeter and juicier experience, making them a favorite choice for many gardeners.

2. Icebox Watermelons

3. Yellow Flesh Watermelons

Tips for Growing Watermelon in North Carolina

Yellow flesh watermelons offer a unique and refreshing flavor. The flesh of these watermelons is yellow, which distinguishes them from the more common red-fleshed varieties. Yellow flesh watermelons are often sweeter and less stringy, making them a popular choice for those seeking a different taste sensation.

4. Allsweet Watermelons

Allsweet watermelons are a classic variety that offers a good balance between sweetness and size. These watermelons have a bright red flesh that is exceptionally sweet and juicy. They are typically larger in size, making them a great choice for sharing or if you enjoy watermelon at gatherings or picnics.

Remember to consider your growing conditions, available space, and personal preferences before choosing the right watermelon varieties to ensure a successful and enjoyable harvest. Whether you prefer seedless, small-sized, unique-flavored, or classic watermelons, there is a variety available for every gardener’s needs.

Preparing the Soil and Planting

Before planting watermelon in North Carolina, it is important to prepare the soil properly. Start by choosing a location that receives full sun and has well-drained soil. Watermelon plants require a pH level between 6.0 and 6.8, so it is recommended to test the soil’s pH and amend it accordingly to reach the desired range.

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Soil Preparation:

Begin by removing any weeds or grass from the planting area. This can be done by hand or with the help of a garden hoe or tiller. Once the area is cleared, loosen the soil using a garden fork or tiller, breaking up any clumps and removing rocks or debris. This will help create a loose and aerated soil texture, which is beneficial for watermelon plants.

Next, add organic matter such as compost or well-rotted manure to the soil. This will improve the soil’s fertility and texture, providing essential nutrients for the watermelon plants. Mix the organic matter into the soil using a garden fork or tiller, ensuring it is evenly distributed throughout the planting area.


Watermelon seeds can be directly sown into the prepared soil once the danger of frost has passed and the soil temperature is consistently above 70°F (21°C). Dig holes that are approximately 1 inch (2.5 cm) deep and 2-3 feet (60-90 cm) apart. Place 2-3 seeds in each hole and cover them with soil.

Once the seedlings have emerged, thin them to the strongest plant in each hole. Watermelon plants require adequate space for growth, and thinning will ensure they have enough room to develop properly.

It is also important to provide support for the watermelon plants as they grow. This can be done by installing trellises or constructing wire cages around each plant. This will help support the weight of the developing fruit and prevent it from resting on the ground, reducing the risk of rot and pest damage.

Lastly, water the newly planted watermelon seeds or seedlings thoroughly. Keep the soil consistently moist, but not waterlogged, throughout the growing season. Avoid overwatering, as this can lead to root rot and other problems. Mulching around the plants can help conserve moisture and suppress weed growth.

Tip: It is recommended to plant watermelon in a hill or mound, as this helps with soil drainage and prevents waterlogging. To create a hill, simply pile up soil in a circular shape, about 12-18 inches (30-45 cm) in diameter and 6 inches (15 cm) high. Plant the seeds or seedlings at the center of the hill.

By properly preparing the soil and planting the watermelon seeds or seedlings, you are setting the foundation for a successful and productive watermelon harvest in North Carolina.

Proper Watering and Fertilization

Tips for Growing Watermelon in North Carolina

Watermelon plants require proper watering and fertilization to ensure healthy growth and maximum fruit production. Here are some guidelines to follow:

1. Watering

Watermelon plants need consistent watering throughout their growth cycle, especially during hot, dry periods. The soil should be consistently moist but not waterlogged. It is best to water deeply and infrequently, allowing the water to penetrate the soil and reach the root zone.

One effective technique is to use a drip irrigation system, which delivers water directly to the root zone, minimizing water waste and reducing the risk of foliar diseases. Another method is to water the plants in the early morning, allowing the leaves to dry before evening to prevent fungal infections.

Monitor the moisture level of the soil by sticking your finger about an inch below the surface. If it feels dry, it’s time to water. Aim for about 1-2 inches of water per week, depending on rainfall and soil conditions.

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2. Fertilization

Tips for Growing Watermelon in North Carolina

Fertilizing watermelon plants is essential for providing the necessary nutrients for healthy growth and fruit development. Before planting, it is recommended to perform a soil test to determine the nutrient levels and pH of the soil.

Watermelon plants have high nitrogen requirements, especially during the early growth stages. A balanced fertilizer with a higher nitrogen content, such as a 10-10-10 or 14-14-14 formulation, can be used. Apply the fertilizer according to the package instructions, usually spreading it evenly around the plants and then watering thoroughly.

As the plants grow, they will also benefit from side dressing with additional nitrogen-rich fertilizers. This can be done about 3-4 weeks after planting and again when the fruits begin to develop.

In addition to nitrogen, watermelon plants also require phosphorus and potassium for root development, flower formation, and fruit production. Consider using a fertilizer that contains these essential nutrients, such as a 5-10-10 or 10-20-20 formulation, to promote overall plant health.

When applying fertilizers, be careful not to overdo it, as excessive fertilization can lead to excessive vegetative growth, reduced fruit quality, and increased susceptibility to diseases.

By following these proper watering and fertilization practices, you can ensure that your watermelon plants receive the necessary nutrients for optimal growth, health, and fruit production. Remember to monitor the moisture levels of the soil and adjust watering accordingly, and always follow the fertilization guidelines provided by the manufacturer.

Proper watering and fertilization are vital aspects of successful watermelon cultivation, and with proper care, you can enjoy a bountiful harvest of delicious, juicy watermelons.

Protecting the Watermelon Plants

Identifying and Controlling Pests

Regularly inspect your plants for signs of pest activity. Look for yellowing leaves, wilting, or holes in the leaves, which are all indicators of pest damage. If you spot any pests, take action immediately to prevent further damage to your watermelon plants.

There are several ways to control pests organically. One method is to introduce beneficial insects, such as ladybugs or parasitic wasps, which prey on common garden pests. Another option is to use insecticidal soap or neem oil, both of which are safe and effective for controlling pests.

Preventing Diseases

Start by planting disease-resistant varieties of watermelon, as they are less likely to be affected by common diseases. Make sure to space your plants properly, allowing for good air circulation and reducing the risk of disease spread. Additionally, water your plants at the base to avoid wetting the foliage, as this can promote the growth of diseases.

Using Mulch and Row Covers

Tips for Growing Watermelon in North Carolina

Mulching your watermelon plants can provide several benefits, including protection against weeds and improved soil moisture retention. Apply a layer of organic mulch, such as straw or wood chips, around the base of your plants, making sure to leave space around the stem to prevent rot.

Another effective method of protecting your watermelon plants is to use row covers. These lightweight fabric covers create a physical barrier that prevents pests from reaching your plants. Row covers also help to retain heat and moisture, creating a favorable environment for plant growth.


Tips for Growing Watermelon in North Carolina

By taking the necessary steps to protect your watermelon plants from pests and diseases, you can ensure a successful harvest. Regular monitoring, organic pest control methods, disease prevention techniques, and the use of mulch and row covers will all contribute to the health and productivity of your watermelon plants.

Harvesting and Storing Watermelon

Harvesting watermelon at the right time is crucial to ensure maximum flavor and sweetness. It is important to know when the watermelon is ripe and ready to be harvested. Here are some signs to look for when determining if a watermelon is ready to be picked:

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Signs of a ripe watermelon include:
– Dull skin: The skin of a ripe watermelon will be dull, not shiny.
– Yellow underside: The underside of a watermelon should have a creamy yellow color, indicating that it is fully ripe.
– Thumping sound: When you tap the watermelon, it should produce a deep, hollow sound, indicating that it is ripe and juicy.
– Cracked stem: If the stem of the watermelon is cracked, it is a sign that it is fully ripe and ready to be harvested.

Once you have determined that the watermelon is ripe, it is time to harvest it. Use a sharp knife or pruning shears to cut the watermelon from the vine, leaving a few inches of stem attached to the fruit. Be careful not to damage the fruit during the harvesting process.

After harvesting, it is important to handle the watermelon with care to avoid any damage. Place the harvested watermelon in a cool, dry place and avoid stacking them on top of each other, as this can cause bruising. It is best to store them individually to ensure proper airflow around each fruit.

Watermelons can be stored at room temperature for a few days, but for longer storage, it is best to refrigerate them. Before refrigerating, make sure to wash the watermelon with water to remove any dirt or debris. It is also recommended to wrap the watermelon in plastic wrap or place it in a sealed container to prevent moisture loss and maintain its freshness.

When stored properly, watermelons can last up to two weeks in the refrigerator. However, keep in mind that the flavor and texture of the watermelon may deteriorate over time, so it is best to consume them as soon as possible for the best taste.

Now that you know how to harvest and store watermelons properly, you can enjoy the fruits of your labor and indulge in delicious, juicy watermelon all summer long.

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