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The best time to grow watermelon in Texas starts in early spring, once the soil has warmed up and the danger of frost has passed.
If you’ve been wondering when to grow watermelon in Texas, the answer really depends on your region because Texas is a big state with wildly different growing conditions.
In most parts of Texas, you’ll want to plant watermelon seeds or transplants between March and May.
But in South Texas, you can often start as early as late February or early March.
In the Panhandle and North Texas, you might need to wait until mid-April or even early May.
Watermelons love heat, but they absolutely hate cold soil, so timing is everything when you grow watermelon in Texas.
In this post, we’ll walk through exactly when to grow watermelon in Texas, how to pick the right window for your area, and a few tips to make sure your melons thrive.
Let’s dig in.
When to Grow Watermelon in Texas by Region
Timing when to grow watermelon in Texas isn’t a one-size-fits-all answer.
The state spans multiple growing zones, so your planting window shifts depending on where you live.
Here’s how to figure out the right time for your neck of the woods:
1. South Texas (Zones 9a–10a)
If you’re in South Texas, you get the earliest start of anyone in the state.
You can grow watermelon in Texas as early as late February through March.
The warm Gulf air keeps soil temperatures friendly, so your seeds germinate fast.
Just keep an eye on any surprise cold snaps and have row covers ready.
2. Central Texas (Zones 8a–8b)
Central Texas, including Austin and San Antonio, is prime watermelon country.
The best time to grow watermelon in Texas here is from mid-March to mid-April.
By then, the soil is consistently above 70°F, which is what watermelon seeds need to sprout.
Plant too early and those seeds will just sit there and rot.
3. North Texas (Zones 7b–8a)
Up in North Texas, including Dallas and Fort Worth, you’ll want to wait a bit longer.
The ideal window to grow watermelon in Texas here is April through early May.
Late frosts are still a real threat in March, and watermelon seedlings won’t survive a freeze.
Waiting until the soil warms up gives your plants a strong start.
4. The Panhandle and West Texas (Zones 6b–7b)
The Panhandle has the shortest growing season in the state.
If you want to grow watermelon in Texas out here, aim for late April to mid-May.
You’ll also want to choose short-season varieties that mature in 75 to 85 days.
That way, your melons have time to ripen before the first fall chill.
Why Soil Temperature Matters When You Grow Watermelon in Texas
Knowing when to grow watermelon in Texas isn’t just about the calendar.
It’s really about soil temperature, because that’s what drives germination.
Watermelon seeds need soil that’s at least 70°F, and they do even better when it’s 75°F to 85°F.
If you plant when the ground is still cool, your seeds will take forever to sprout or simply rot.
A cheap soil thermometer takes the guesswork out of when to grow watermelon in Texas.
Stick it a few inches down in the morning for a few days in a row.
Once you’re consistently seeing 70°F or higher, you’re good to go.
This one habit will save you so much frustration.
1. Start Seeds Indoors for a Head Start
If you’re in a short-season area, you can start seeds indoors about three to four weeks before your last frost date.
This lets you grow watermelon in Texas even when the outdoor soil isn’t ready yet.
Just be gentle when transplanting, because watermelon roots hate being disturbed.
2. Use Black Plastic Mulch
Black plastic mulch warms the soil and helps you grow watermelon in Texas earlier than you otherwise could.
It absorbs heat during the day and keeps the ground warm at night.
As a bonus, it also keeps weeds down and holds moisture in.
3. Watch Your Last Frost Date
Every region in Texas has a different last frost date, and that’s your real anchor.
Planting two weeks after your last frost is a safe bet when you grow watermelon in Texas.
Your local extension office can tell you the exact date for your county.
Signs You Planted at the Right Time
When you grow watermelon in Texas at the right time, you’ll notice the difference fast.
Your seeds sprout within a week to ten days instead of sitting idle for weeks.
Seedlings grow vigorously and vines start running within a few weeks.
Flowers show up in about a month, and fruit sets shortly after that.
If your plants stall out or the leaves turn yellow early, cold soil was probably the culprit.
So, When to Grow Watermelon in Texas?
To grow watermelon in Texas, plant between March and May depending on your region, with South Texas starting earliest and the Panhandle waiting the longest.
The key is warm soil, no frost, and plenty of sun.
Get that timing right, and you’ll be harvesting sweet, juicy melons all summer long.
So pick your window, prep your soil, and get those seeds in the ground.
Happy growing.