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Water Melon Plant Seeds:
Guide to Storing, Sowing and Germination

Updated: July 18, 2023

Watermelon, with its juicy and refreshing flesh, is a favorite fruit for many people during the hot summer months. Growing your own watermelons can be a rewarding experience, and it all starts with the seeds. In this guide, we will explore the process of storing, sowing, and germinating watermelon plant seeds to help you successfully grow your own delicious watermelons.

Storing Watermelon Plant Seeds

Storing watermelon seeds properly is essential to maintain their viability and ensure successful germination. Here are some steps to follow when storing watermelon plant seeds:

  1. Harvesting the Seeds: Harvesting watermelon seeds is relatively easy. Simply cut open a ripe watermelon and scoop out the seeds. It’s important to choose a fully ripe melon as immature seeds may not germinate well.

  2. Cleaning the Seeds: After removing the seeds from the fruit, rinse them thoroughly under running water to remove any traces of pulp or debris. Place the seeds on a clean towel or paper towel to dry.

  3. Drying the Seeds: Allow the seeds to air dry completely before storing them. This can take anywhere from a few days to a week, depending on the humidity in your area. Make sure the seeds are completely dry to prevent mold or rot during storage.

  4. Storage Containers: Store the dried watermelon seeds in an airtight container such as a glass jar or a sealed plastic bag. It’s important to choose a container that is moisture-proof and can keep out pests like insects and rodents.

  5. Cool and Dark Location: Store the container in a cool, dark place like a pantry or a basement. Avoid exposing the seeds to direct sunlight or extreme temperatures as this can reduce their viability.

By following these steps, you can store watermelon plant seeds for several years, ensuring you have a steady supply of seeds for future plantings.

Sowing Watermelon Plant Seeds

Sowing watermelon seeds involves planting them in the soil under optimal conditions for germination and growth. Here’s how you can sow watermelon seeds:

  1. Timing: Watermelons are warm-season crops, so it’s important to wait until all danger of frost has passed before sowing the seeds. In most regions, this is around late spring or early summer.

  2. Soil Preparation: Prepare the soil by removing any weeds or debris and loosening it with a garden fork or tiller. Watermelons prefer well-draining soil, so it’s a good idea to amend heavy clay or sandy soil with organic matter such as compost.

  3. Spacing and Depth: Create small mounds of soil spaced about 2-3 feet apart. Make a small hole in the center of each mound, about 1 inch deep. Place 2-3 watermelon seeds in each hole and cover them with soil.

  4. Watering: After sowing the seeds, water the soil gently but thoroughly to ensure good seed-to-soil contact. Avoid overwatering, as waterlogged soil can lead to rotting of the seeds.

  5. Germination: Watermelon seeds typically germinate within 7-10 days, depending on the temperature and moisture levels. Once the seedlings emerge, thin them out to leave only the strongest one per mound.

Germinating Watermelon Plant Seeds

Germination is the process by which a seed sprouts and starts growing into a new plant. Here are some tips for successful germination of watermelon plant seeds:

  1. Temperature: Watermelon seeds require warm soil temperatures between 75-85°F (24-29°C) for optimal germination. You can use a soil thermometer to measure the temperature before sowing the seeds.

  2. Moisture: Keep the soil consistently moist but not waterlogged during germination. Watering lightly once or twice a day should be sufficient, depending on the weather conditions. Avoid letting the soil dry out completely.

  3. Light: Watermelon seeds do not require light to germinate, so there’s no need to expose them to direct sunlight at this stage. Once the seedlings emerge, however, they will need full sun for healthy growth.

  4. Transplanting: After the seedlings have developed true leaves and are about 3-4 inches tall, they can be transplanted into their final growing location. Choose a sunny spot with well-draining soil and enough space for the watermelon vines to spread out.

By following these guidelines for storing, sowing, and germinating watermelon plant seeds, you can increase your chances of successfully growing your own juicy and delicious watermelons. Remember to choose high-quality seeds from reputable sources and provide the optimal conditions for germination and growth. Happy gardening!