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Yes, you can grow watermelon with the seeds from a store-bought melon, and it’s actually a fun and rewarding project.
Those little black or brown seeds inside your juicy summer fruit are fully capable of sprouting into a whole new plant.
If you’ve ever wondered, “can you grow watermelon with the seeds?” the answer is a resounding yes, with a few important caveats.
You can grow watermelon with seeds from a fresh melon, but the resulting fruit might not taste exactly like the parent.
That’s because most store-bought watermelons are hybrids, meaning their seeds carry a mix of genetic traits.
Still, you can grow watermelon with the seeds and enjoy the surprise of seeing what you get.
In this post, we’ll walk through exactly how to grow watermelon with the seeds, from saving them properly to planting and caring for the vines.
Let’s dig in.
Why You Can Grow Watermelon With the Seeds
You can grow watermelon with the seeds because each seed contains a tiny embryo with all the genetic information needed to become a full plant.
Here’s why this works so well:
1. Seeds Are Nature’s Blueprint
Every watermelon seed holds a dormant plant waiting for the right conditions.
When you provide warmth, moisture, and oxygen, that seed breaks dormancy and starts germinating.
This is the fundamental reason you can grow watermelon with the seeds from any mature melon.
2. Hybrid Seeds Still Grow
Yes, hybrid varieties produce seeds that will grow, but the offspring won’t be identical to the parent.
You can still grow watermelon with the seeds from a hybrid, but expect variation in size, sweetness, and rind color.
Sometimes you get a fantastic new melon, and sometimes you get something mediocre.
3. Heirloom Seeds Give True-to-Type Fruit
If you want to grow watermelon with the seeds and get the exact same fruit, start with heirloom varieties.
Heirloom seeds are open-pollinated, so they produce plants just like the parent.
That means when you grow watermelon with the seeds from an heirloom, you know what you’re getting.
4. Seedless Watermelons Won’t Work
You cannot grow watermelon with the seeds from a seedless melon because those white seed coats are sterile.
They lack a viable embryo, so they won’t germinate no matter what you do.
If you want to grow watermelon with the seeds, always choose a seeded variety.
How to Grow Watermelon With the Seeds Step by Step
Now that you know you can grow watermelon with the seeds, here’s how to do it right.
1. Save and Clean the Seeds
Scoop the seeds out of a ripe melon and rinse off the pulp.
Choose the plump, dark seeds because these are the most viable.
If you want to grow watermelon with the seeds, spread them on a paper towel to dry for about a week.
2. Start Seeds Indoors
Watermelons need a long warm season, so starting indoors gives you a head start.
Plant seeds about one inch deep in small pots filled with seed-starting mix.
Keep the soil warm, around 70 to 85 degrees Fahrenheit, and moist but not soggy.
You can grow watermelon with the seeds in about 7 to 14 days when conditions are right.
3. Harden Off and Transplant
Once seedlings have two or three true leaves and the danger of frost has passed, harden them off.
Set them outside for a few hours each day, gradually increasing the time over a week.
Then transplant them into rich, well-drained soil in full sun.
Space plants about three to five feet apart because vines need room to sprawl.
4. Water and Feed Regularly
Watermelons are thirsty plants, so water deeply once a week, aiming for about an inch of water.
Feed them with a balanced fertilizer early on, then switch to a low-nitrogen blend once flowers appear.
When you grow watermelon with the seeds, consistent moisture is key to sweet, juicy fruit.
5. Watch for Pests and Pollinators
Bees are essential because they pollinate the flowers that become melons.
Avoid spraying insecticides during bloom time so pollinators can do their job.
Keep an eye out for aphids, squash bugs, and powdery mildew, and treat problems early.
Tips to Grow Watermelon With the Seeds Successfully
Want to grow watermelon with the seeds like a pro?
Keep these tips in mind.
1. Give Them Plenty of Sun
Watermelons need at least six to eight hours of direct sunlight daily.
The more sun, the sweeter the fruit when you grow watermelon with the seeds.
2. Use Black Plastic Mulch
Black plastic mulch warms the soil and speeds up growth.
This is especially helpful in cooler climates where you grow watermelon with the seeds.
3. Be Patient With Harvest
It takes 70 to 90 days from planting to harvest, depending on the variety.
A ripe watermelon has a dried tendril near the stem and a dull thud when tapped.
Don’t rush it, because the wait is worth it.
So, Can You Grow Watermelon With the Seeds?
You can grow watermelon with the seeds, and it’s a satisfying way to turn a summer snack into a garden project.
Just remember that hybrid seeds may surprise you, while heirloom seeds give predictable results.
Seedless melons won’t work, so always start with seeded fruit.
With warmth, sunlight, water, and a little patience, you can grow watermelon with the seeds and enjoy your own homegrown harvest.
Happy planting.