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Caring for growing watermelons comes down to giving them plenty of sunlight, steady moisture, and room to sprawl.
These warm-season fruits love heat and they reward you generously when you get the basics right.
If you’ve been wondering how to care for growing watermelons in your own backyard, the good news is that it’s simpler than most people think.
In this post, we’ll walk through how to care for growing watermelons from planting all the way to harvest, so you can enjoy sweet, juicy fruit straight from your garden.
Let’s dig in.
How to Care for Growing Watermelons: The Basics
Caring for growing watermelons starts with understanding what these plants actually need to thrive.
Watermelons are heavy feeders and thirsty vines, but they hate sitting in soggy soil.
Once you balance those two needs, the rest of the care becomes much easier.
1. Give Them Full Sun
Watermelons need at least six to eight hours of direct sunlight every single day.
When you care for growing watermelons, sunlight is what fuels their growth and sugar production.
A sunny spot also helps prevent fungal issues because the leaves dry off faster after rain or watering.
If you can, plant them somewhere with southern exposure so they soak up as much light as possible.
2. Water Deeply but Not Too Often
Learning how to care for growing watermelons means learning how to water them properly.
Water deeply once or twice a week, aiming for about one to two inches of moisture each time.
Soak the soil around the base rather than the leaves to keep disease at bay.
As the fruit starts to ripen, cut back slightly on watering, which actually concentrates the sugars in the melon.
3. Feed the Soil, Not Just the Plant
Caring for growing watermelons is really about caring for the soil beneath them.
Mix in plenty of compost before planting and side-dress with a balanced fertilizer when the vines start running.
Once flowers appear, switch to a fertilizer lower in nitrogen so the plant focuses on fruit instead of leaves.
Healthy soil means healthier vines, and healthier vines mean sweeter watermelons.
How to Care for Growing Watermelons as Vines Spread
As your watermelons grow, the vines will sprawl across your garden and demand a little more attention.
This is where a bit of hands-on care really pays off.
1. Give the Vines Room to Run
Watermelon vines can stretch six to ten feet, so space them at least three to five feet apart.
When you care for growing watermelons, crowding is one of the biggest mistakes you can make.
Good airflow between plants reduces the risk of powdery mildew and other diseases.
If space is tight, you can also train them up a sturdy trellis and support the fruit with a sling.
2. Mulch to Retain Moisture
Mulching is a simple but powerful way to care for growing watermelons.
A layer of straw or compost around the base keeps moisture in and weeds out.
It also keeps the fruit clean and off bare soil, which helps prevent rot.
Weeds compete for water and nutrients, so mulching gives your melons a real advantage.
3. Watch for Pests and Diseases
Caring for growing watermelons also means keeping an eye out for trouble.
Aphids, cucumber beetles, and squash bugs love watermelon vines.
Check the undersides of leaves regularly and treat problems early with insecticidal soap or neem oil.
Good spacing, proper watering, and clean soil go a long way toward preventing disease in the first place.
How to Care for Growing Watermelons Until Harvest
The final stage of care is all about patience and timing.
How you care for growing watermelons near the end directly affects how sweet they taste.
1. Reduce Water as Fruit Ripens
As harvest time approaches, slowly reduce how much you water.
Less water late in the season means the sugars in the melon become more concentrated.
Just don’t cut water completely, since the vines still need some moisture to finish the job.
2. Protect the Fruit from Pests
Slugs and rodents love a ripe watermelon as much as you do.
Set the fruit on a piece of cardboard or straw to keep it off the ground.
You can also cover ripening melons with a mesh or a light row cover.
A little protection now saves you from heartbreak later.
3. Know When to Pick
Knowing how to care for growing watermelons includes knowing when they’re ready.
The tendril closest to the fruit turns brown and dries up when it’s ripe.
The spot where the melon sits on the ground should be creamy yellow, not white or green.
And when you thump it, you should hear a deep, hollow sound.
So, How Do You Care for Growing Watermelons?
You care for growing watermelons by giving them full sun, deep watering, rich soil, and plenty of space to spread.
Add mulch, watch for pests, and ease off the water as the fruit ripens.
Caring for growing watermelons isn’t complicated, but it does reward attention and consistency.
Follow these steps and you’ll be slicing into sweet, homegrown watermelons before you know it.