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Yes, you can grow watermelon in Minnesota, and plenty of gardeners across the state do it successfully every summer.
The catch is that Minnesota has a shorter growing season than the traditional watermelon belt down south.
But with the right variety, a warm spot in your garden, and a little patience, growing watermelon in Minnesota is absolutely doable.
In this post, we’ll walk through how to grow watermelon in Minnesota, which varieties work best, and the tips that make the biggest difference up north.
Let’s dig in.
Why You Can Grow Watermelon in Minnesota
You can grow watermelon in Minnesota because the state’s long summer days give these heat-loving vines plenty of sunlight to work with.
The main challenge isn’t sunlight, it’s the length of the season.
Minnesota sits in USDA hardiness zones 3 to 5, which means frost can stick around until late May and return as early as September.
Watermelons need roughly 70 to 90 days of warm weather to ripen, depending on the variety.
That window is tight in Minnesota, but it’s not impossible.
Here’s why growing watermelon in Minnesota still works:
1. Long Summer Days Help
Minnesota gets some of the longest daylight hours in the country during June and July.
Those extra hours of sun push watermelon vines to grow fast and set fruit quickly.
That extended daylight is a real advantage when you’re growing watermelon in Minnesota.
2. Short-Season Varieties Exist
Plant breeders have developed watermelons that mature in as little as 65 to 75 days.
These short-season types are the key to growing watermelon in Minnesota successfully.
Without them, you’d be racing the first fall frost and usually losing.
3. Warm Microclimates Make a Difference
If your garden has a south-facing slope or a spot against a sunny wall, that warmth adds days to your season.
Many Minnesota gardeners grow watermelon near blacktop driveways or raised beds that hold heat.
These small advantages add up when the season is short.
Best Watermelon Varieties for Minnesota
Choosing the right variety is the single most important decision when growing watermelon in Minnesota.
Here are the types that consistently perform well in short-season climates:
1. Sugar Baby
Sugar Baby is a classic icebox watermelon that ripens in about 75 days.
The fruits are small, sweet, and perfect for Minnesota’s shorter summers.
It’s one of the most reliable choices for growing watermelon in Minnesota.
2. Blacktail Mountain
Blacktail Mountain was developed specifically for cool, short-season regions.
It ripens in around 70 days and produces dark green fruit with bright red flesh.
If you only try one variety, this is a great pick for Minnesota.
3. Yellow Doll
Yellow Doll is another early variety, maturing in about 70 days.
It has yellow flesh and a thin rind, and it handles cooler nights better than many types.
That toughness makes growing watermelon in Minnesota a lot less risky.
4. Sweet Dakota Rose
Sweet Dakota Rose was bred for the northern plains and ripens in roughly 70 days.
It’s cold-tolerant and produces sweet, crisp fruit.
For Minnesota gardeners, this one is built for the job.
How to Grow Watermelon in Minnesota
Once you’ve picked your variety, the next step is giving your plants the best possible start.
Here’s how to grow watermelon in Minnesota from seed to harvest:
1. Start Seeds Indoors
Begin your watermelon seeds indoors about three to four weeks before your last frost date.
In Minnesota, that’s usually mid to late April.
Use peat pots or biodegradable containers so you can transplant without disturbing the roots.
Watermelon roots hate being disturbed, so this step matters.
2. Wait for Warm Soil
Don’t rush your seedlings into the ground.
Watermelons need soil temperatures of at least 60°F, ideally closer to 70°F.
In Minnesota, that’s often late May or early June.
Planting too early can stunt the vines and set you back weeks.
3. Use Black Plastic or Row Covers
Black plastic mulch warms the soil and keeps weeds down.
Row covers or low tunnels trap heat around young plants and protect them from chilly nights.
Both tools are almost essential for growing watermelon in Minnesota.
4. Plant in Full Sun
Watermelons want at least eight hours of direct sun every day.
Pick the sunniest spot in your yard, even if it’s not your prettiest garden bed.
Sunlight is what fuels those fast-growing vines.
5. Water Deeply and Consistently
Give your plants about an inch of water per week, more during hot spells.
Water at the base of the plant to keep the leaves dry and reduce disease.
Consistent moisture helps fruit develop evenly.
6. Pollinate by Hand if Needed
Bee activity can be spotty in cool Minnesota springs.
If you see flowers but no fruit, try hand-pollinating by transferring pollen from male to female flowers with a small brush.
This simple trick can rescue your harvest when pollinators are scarce.
7. Harvest Before the First Frost
Watch the calendar closely as September approaches.
Check for a dried tendril near the stem and a dull thud when you tap the fruit.
If frost is coming, harvest early rather than lose the whole melon.
So, Can You Grow Watermelon in Minnesota?
You can grow watermelon in Minnesota, and gardeners across the state prove it every year.
The short season is the biggest hurdle, but short-season varieties, warm soil, and a little planning close that gap.
Pick the right variety, start seeds indoors, and give your vines the sunniest, warmest spot you’ve got.
Growing watermelon in Minnesota takes a bit more effort than it does down south, but biting into a homegrown slice makes every bit of it worth it.