How to Save Watermelon Seeds for a Bountiful Harvest Next Season

Watermelons are the quintessential summer fruit, offering a refreshing burst of sweetness on hot days. 

But did you know that those little black seeds you’ve been spitting out (or avoiding in seedless varieties) hold the key to next year’s harvest? By saving your watermelon seeds, you’re not just preserving a piece of summer; you’re setting the stage for a bountiful garden in the seasons to come. 

Why Should You Save Watermelon Seeds?

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Have you ever wondered why gardeners go through the trouble of saving seeds? It’s not just about being thrifty—though that’s certainly a perk. Saving watermelon seeds offers a host of benefits that go beyond your wallet:

  1. Cost-Effective Gardening: Let’s face it, buying seeds or seedlings every year can add up. By saving your own seeds, you’re essentially getting free plants for next season.
  2. Preserve Favorite Varieties: Found a watermelon that’s just perfect? By saving its seeds, you ensure you can grow that same delicious variety year after year.
  3. Contribute to Biodiversity: When you save seeds from open-pollinated varieties,(ref) you’re helping to maintain genetic diversity in our food supply.
  4. Satisfaction of Growing from Saved Seeds: There’s an unmatched sense of accomplishment in growing a plant from seeds you’ve saved yourself.

But before you start scooping seeds out of your next watermelon, it’s important to know which melons are best for seed saving.

How Do You Select the Right Watermelon for Seed Saving?

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Not all watermelons are created equal when it comes to seed saving. To ensure success, follow these guidelines:

Choose Fully Ripe, Healthy Watermelons

The best seeds come from the best fruits. Look for watermelons that are at peak ripeness and free from disease or pest damage.

Opt for Open-Pollinated or Heirloom Varieties

These types of watermelons will produce seeds that grow true to the parent plant. Some popular open-pollinated varieties include ‘Sugar Baby’, ‘Crimson Sweet’, and ‘Moon and Stars’.

Avoid Hybrid Watermelons

While hybrids often produce delicious fruit, their seeds won’t grow into plants that match the parent. Stick to open-pollinated varieties for seed saving.

Remember, the quality of your seeds directly impacts the quality of your future plants. Choose wisely!

What’s the Best Way to Harvest Watermelon Seeds?

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Now that you’ve selected the perfect watermelon, it’s time to harvest those seeds. Here’s how to do it:

Timing is Everything

Wait until the watermelon is fully ripe. Signs of ripeness include a yellow spot on the bottom where it sat on the ground, a hollow sound when tapped, and a dry, curled tendril near the stem.

Extraction Process

  • Cut the watermelon in half.
  • Scoop out the seeds into a colander.
  • Rinse the seeds under cool water, rubbing them gently to remove any pulp.

Cleaning the Seeds

After rinsing, spread the seeds on a paper towel to remove any remaining pulp. Clean seeds are essential for successful storage and germination.

What’s the Best Way to Store Watermelon Seeds?

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Proper storage is key to maintaining seed viability. Here’s how to keep your watermelon seeds in top condition:

  1. Ideal Storage Conditions:
    • Temperature: Cool and consistent, ideally between 32°F and 41°F.
    • Humidity: Low, around 20-30%.
  2. Containers for Seed Storage:
    • Use airtight containers like glass jars or sealed plastic bags.
    • Add a desiccant packet to absorb any residual moisture.
  3. Labeling and Organization Tips:
    • Label each container with the variety name and date of collection.
    • Store in a dark place, like a refrigerator or cool basement.
  4. Seed Viability: When stored properly, watermelon seeds can last up to five years. However, germination rates may decrease over time, so it’s best to use them within 2-3 years for optimal results.

What’s the Final Word on Saving Watermelon Seeds?

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Saving watermelon seeds is a simple yet rewarding process that connects you to the full cycle of plant growth. 

So the next time you’re enjoying a slice of watermelon, don’t discard those seeds. Instead, see them as tiny promises of future gardens and delicious harvests. With a little patience and care, you can turn this year’s snack into next year’s bounty. 

nancy
Author & Editor | + posts

Nancy has been a plant person from an early age. That interest blossomed into a bachelor’s in biology from Elmira College and a master’s degree in horticulture and communications from the University of Kentucky. Nancy worked in plant taxonomy at the University of Florida and the L. H. Bailey Hortorium at Cornell University, and wrote and edited gardening books at Rodale Press in Emmaus, PA. Her interests are plant identification, gardening, hiking, and reading.