How to Save Watermelon (Citrullus lanatus) Seeds

Seed Saving Guide #2740
Family: Cucurbitaceae
Binomial name: Citrullus lanatus

Flower Type Monoecious (male and female flowers on the same plant), self-compatible
Pollination Insect pollinated
Isolation Distance 500m
Other Isolation Methods Hand pollination.
Population Required for Viable Seeds 1
Population Required to Maintain Variety 5-10
When to Harvest When fruit is ripe; fruit can be left on the vine up to 20 days after ripening.
How to Harvest

Keep seeds from eating the fruit, or place flesh in a bucket, mash it and add water; the seeds will fall to the bottom of the bucket and the flesh and water can be decanted.

How to Clean

Rinse seeds to remove any remaining flesh and spread them out on a plate to dry.

Image of Seeds Watermelon (Citrullus lanatus)

What is Seed Saving?

Seed saving is the practice of collecting and storing mature seeds from open-pollinated plants. By allowing plants to reach full maturity and harvesting the seeds, they can be cleaned, dried, and stored for future use. 

  • To learn the techniques and methods needed to save seeds in your garden, we recommend reading our seed saving series.
  • To view a combined table of all our seed saving guides view our Seed Saving Chart.
  • To browse our seed saving guides individually click here.