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Caring for growing watermelons is all about giving them plenty of sunshine, steady warmth, and consistent moisture from the moment they sprout until harvest day.
These thirsty, heat-loving vines aren’t difficult to grow, but they do have a few strong opinions about their conditions.
If you’ve been wondering how to care for growing watermelons, the good news is that a little attention goes a very long way.
In this post, we’ll walk through how to care for growing watermelons step by step, from watering and feeding to pollination and pest patrol.
Let’s dig in.
How to Care for Growing Watermelons: The Basics
Caring for growing watermelons starts with getting the fundamentals right, because these plants reward good habits handsomely.
1. Give Them Full Sun
Watermelons want at least eight hours of direct sunlight every single day.
When you care for growing watermelons, sunlight is the number one factor that determines how sweet the fruit turns out.
A shady spot will give you slow growth, small fruit, and a disappointing harvest.
So plant them somewhere open, sunny, and protected from cold winds.
2. Keep the Soil Warm and Loose
Watermelons hate cold roots, so wait until the soil is at least 70°F before planting.
Loose, well-draining soil lets those long taproots stretch down without a fight.
Mixing in compost before planting gives growing watermelons a nutrient-rich bed to settle into.
3. Water Deeply but Not Too Often
When you care for growing watermelons, aim for about one to two inches of water per week.
Water deeply at the base so the moisture reaches the roots rather than splashing the leaves.
Wet foliage invites disease, so keep the vines as dry as you reasonably can.
Once the fruit starts ripening, ease off the watering to concentrate the sugars.
Feeding and Pollinating Growing Watermelons
Growing watermelons are heavy feeders, and they also need a little help getting pollinated.
1. Fertilize at the Right Times
Start with a balanced fertilizer when the vines begin to run.
Switch to a low-nitrogen blend once flowers appear, because too much nitrogen grows leaves instead of fruit.
When you care for growing watermelons, a little potassium during fruit development goes a long way.
2. Welcome the Bees
Watermelons depend on bees to move pollen from male to female flowers.
Each female flower needs several visits to set fruit properly.
Planting flowers nearby keeps pollinators coming back, which helps growing watermelons set more fruit.
If bees are scarce, you can hand-pollinate by brushing pollen from a male flower onto a female bloom.
3. Handle Pests and Disease Early
Aphids, cucumber beetles, and squash bugs all love growing watermelons as much as you do.
Check under leaves regularly and remove pests by hand or with a gentle spray of water.
Powdery mildew is the most common disease, and good airflow plus dry leaves keeps it at bay.
Supporting and Harvesting Growing Watermelons
As the fruit swells, growing watermelons need a bit of support and patience.
1. Protect the Fruit From Rot
Slip a piece of cardboard or straw under each melon so it doesn’t sit directly on wet soil.
This simple trick keeps growing watermelons clean and free from rot.
2. Know When to Pick
A ripe watermelon has a dull thud when you knock on it and a dried, brown tendril near the stem.
The spot where it rested on the ground should turn creamy yellow rather than white.
Once you’ve cared for growing watermelons all season, don’t rush the harvest, because they stop ripening the moment you pick them.
So, How Do You Care for Growing Watermelons?
Caring for growing watermelons comes down to sunshine, warm soil, steady water, and a little help from the bees.
Give them those basics, and they’ll reward you with heavy, sugar-sweet fruit by late summer.
So whether you’re a first-time grower or a seasoned gardener, now you know exactly how to care for growing watermelons from seed to slice.