Watermelons are a quintessential summer treat, beloved for their juicy sweetness and hydrating properties. When it comes to seeds, not all watermelons are created equal. Most commercially available watermelons contain either black seeds, white seeds, or a combination of both.

Black seeds are fully developed and fertile, capable of growing into new watermelon plants if planted. White seeds, on the other hand, are immature and infertile. They’re softer and more translucent than their black counterparts. Seedless watermelons, despite their name, actually contain these small white seed coats.

The presence of seeds in a watermelon doesn’t affect its nutritional value or taste. Both seeded and seedless varieties offer the same refreshing qualities that make watermelon a popular choice for staying cool and hydrated during hot summer days. Whether you prefer to spit out the seeds or eat them along with the fruit, watermelons remain a delicious and nutritious option for fruit lovers.

Watermelon Varieties

Watermelons come in two main types: seeded and seedless. Each offers unique characteristics and flavors for consumers to enjoy.

Seeded Watermelons

Seeded watermelons contain black seeds throughout their flesh. These varieties include popular options like Crimson Sweet and Charleston Grey. Crimson Sweet produces 15-35 pound melons with dark red flesh and a high sugar content.

Charleston Grey features a distinctive gray-green rind and weighs 30-40 pounds. It remains a favorite among gardeners and small-scale farmers. The Allsweet variety yields large 25-30 pound oblong fruits with dark and light green striped skin.

Seeded watermelons develop through natural pollination. Their black seeds are fertile and can be planted to grow new watermelon plants.

Seedless Watermelons

Seedless watermelons contain small, undeveloped white seed coats instead of mature black seeds. They result from cross-breeding a diploid seeded watermelon with a tetraploid watermelon treated with colchicine.

Popular seedless varieties include Crimson Sweet Seedless and Sugar Baby Seedless. These melons tend to be sweeter and have a crisper texture than their seeded counterparts.

The National Watermelon Promotion Board reports increasing consumer demand for seedless watermelons due to their convenience. However, some argue seeded varieties offer a more traditional flavor and texture.

Comparing Seed Types

Watermelon seeds come in different varieties, each with unique characteristics and nutritional profiles. These seeds offer various health benefits and can be consumed in different ways.

Mature Seeds and Seed Coats

Mature watermelon seeds are typically black or dark brown with a hard outer shell. These seeds are found in seeded watermelon varieties and are fully developed at harvest time.

The seed coat protects the nutrient-rich embryo inside. Black watermelon seeds are safe to eat and can be consumed raw, roasted, or ground into flour.

Roasting watermelon seeds enhances their flavor and makes them easier to eat. To roast, clean the seeds, dry them, and bake at 325°F (163°C) for about 15 minutes.

Nutritional Profile of Seeds

Watermelon seeds are packed with essential nutrients. They are an excellent source of protein, containing about 8 grams per ounce.

These seeds are rich in:

• Magnesium
• Iron
• Zinc
• Folate
• Potassium
• Niacin
• Manganese

Watermelon seeds also provide healthy fats, including polyunsaturated fatty acids. They contain a good amount of fiber, which supports digestive health.

The nutritional value of watermelon seeds makes them a beneficial addition to a balanced diet.

Health Significance of Watermelon Seeds

Consuming watermelon seeds can contribute to various health benefits due to their nutrient content.

The high magnesium content in these seeds supports bone health and helps regulate blood pressure. Iron in watermelon seeds is crucial for oxygen transport in the body.

Zinc found in these seeds plays a role in immune function and wound healing. The fiber content aids digestion and promotes a healthy digestive system.

Watermelon seeds may help manage cholesterol levels due to their healthy fat content. The antioxidants present in these seeds can contribute to overall health and well-being.

Culinary Uses of Watermelon Seeds

Watermelon seeds offer versatile culinary applications and nutritional benefits. They can be enjoyed raw, roasted, or transformed into various products.

Eating and Preparing Seeds

Watermelon seeds are edible and can be consumed raw or prepared. Raw seeds have a mild, nutty flavor and a soft texture.

To roast watermelon seeds, preheat the oven to 325°F (163°C). Spread the seeds on a baking sheet and season with salt, chili powder, or garlic powder. Roast for 15-20 minutes until golden brown and crispy.

Roasted seeds make an excellent snack or topping for salads, soups, and yogurt. They add a pleasant crunch and nutty taste to dishes.

Watermelon seeds are rich in nutrients, including protein, healthy fats, magnesium, and zinc.

Seed Butter and Other Products

Watermelon seed butter is a creamy, spreadable product made from ground seeds. It has a mild, slightly sweet flavor and smooth texture.

To make seed butter, blend roasted watermelon seeds in a food processor until smooth. Add a pinch of salt or sweetener if desired.

Watermelon seed oil is another valuable product. Cold-pressed from the seeds, this oil is rich in antioxidants and has a mild flavor. It can be used for cooking or as a salad dressing.

Watermelon seed flour, made from ground seeds, serves as a gluten-free alternative in baking. It adds protein and nutrients to recipes.

Cultivation and Harvesting

Growing seeded watermelons requires specific techniques for planting, care, and harvesting. Proper cultivation methods and timely harvesting are essential for producing sweet, juicy fruits with viable seeds.

Growing Watermelons with Seeds

Seeded watermelons thrive in warm, sunny conditions with well-draining soil. Plant seeds directly in the garden after the soil temperature reaches 70°F (21°C). Space seeds 2-3 feet apart in rows 6-8 feet wide to accommodate sprawling vines.

Create mounds or raised rows to improve drainage. Incorporate aged compost or organic matter into the soil before planting. Watermelons prefer a slightly acidic soil pH between 6.0 and 6.8.

Water deeply and consistently, especially during fruit development. Apply mulch to retain moisture and suppress weeds. Fertilize regularly with a balanced, low-nitrogen fertilizer to promote fruit growth.

In Southern Africa, farmers often plant seeded watermelon varieties adapted to local conditions. These cultivars are well-suited to the region’s climate and produce flavorful fruits with abundant seeds.

Harvesting and Storage

Harvest watermelons when fully ripe for the best flavor and viable seeds. Look for these signs of ripeness:

• The tendril nearest the fruit turns brown and dries out
• The underside of the melon changes from white to yellow
• The skin loses its glossy appearance
• Thumping produces a hollow sound

Cut the stem with pruning shears, leaving a short stub attached to the fruit. Handle watermelons carefully to avoid bruising.

Store whole watermelons in a cool, dry place for up to 2 weeks. For seed saving, scoop out the seeds and surrounding pulp. Rinse in water to separate viable seeds, which sink, from non-viable seeds and pulp, which float. Dry seeds thoroughly before storing in a cool, dry location.

Consumer Considerations

When selecting and storing watermelons, consumers should consider factors that affect flavor and health benefits. Proper selection and storage techniques can enhance the enjoyment of both seeded and seedless varieties.

Choosing the Right Watermelon

Look for watermelons with a creamy yellow spot on the bottom, indicating ripeness. A dull, hollow sound when tapped suggests optimal juiciness. Seeded watermelons often have a deeper flavor profile compared to seedless varieties.

Consider the size based on your needs. Larger watermelons typically offer more value per pound. Examine the rind for any soft spots or bruises, which may indicate overripeness or damage.

For those seeking additional nutritional benefits, seeded watermelons contain zinc and magnesium in their seeds. These minerals support overall health and may contribute to better blood pressure regulation.

Watermelon Storage Tips

Store whole watermelons at room temperature for up to a week. Refrigeration can preserve freshness for an additional 3-5 days. Cut watermelon should be refrigerated in an airtight container and consumed within 3-5 days.

To maintain flavor, avoid storing watermelons near strong-smelling foods. Cut watermelon absorbs odors easily. For optimal taste, bring refrigerated watermelon to room temperature before serving.

Freeze cubed watermelon for a refreshing treat or future use in smoothies. Remove seeds before freezing if desired. Properly stored frozen watermelon can last up to 12 months.