N
The Daily Insight

What do watermelon plants need

Author

John Thompson

Updated on May 06, 2026

When fertilizing watermelon plants, use nitrogen based fertilizer at the onset. Once the plant begins flowering, however, switch to feeding the watermelon a phosphorus and potassium based fertilizer. Watermelons require ample potassium and phosphorus for optimal melon production.

How do you take care of a watermelon plant?

While melon plants are growing, blooming, and setting fruit, they need 1 to 2 inches of water per week. Keep soil moist, but not waterlogged. Water at the vine’s base in the morning, and try to avoid wetting the leaves and avoid overhead watering. Reduce watering once fruit are growing.

Do watermelons require a lot of water?

Watermelons do not need a particularly large amount of water at planting times, though they benefit from a thorough drenching of 1 to 2 inches of water every week.

What helps watermelon plants grow?

Give plants a fabulous start to the growing season by improving native soil with several inches of aged compost or other rich organic matter. Consistent water supply is critical to growing huge flavorful watermelon; install a soaker hose or drip irrigation for best results.

Does watermelon need full sun?

Light. Watermelons require full sunlight in order to thrive. The plants can tolerate some partial shade, particularly in hotter climates, but plenty of sun is necessary to develop the sugars in the melons.

Is it easy to grow watermelon?

Watermelons are surprisingly easy to grow as long as the plants have plenty of room to spread, good drainage, lots of sunlight, and a sufficiently long growing season. Gardeners in northern climates should choose early ripening varieties.

How many watermelons do you get from one plant?

How Many Watermelons per Plant? Healthy watermelon vines produce 2-4 fruits per plant. The vines produce both male and female flowers. Both are needed to set fruit and there are fewer female flowers compared to male, about one female for every seven males.

What is the best fertilizer for melons?

Ohio State University recommends a phosphorous- and potassium-heavy fertilizer for melons, with a mixture of 5-10-15 or 10-15-20 to enhance growth, flowering and fruiting All melons should start with a foundation of organic compost and starter fertilizer, then get a side dressing of synthetic or organic fertilizer when …

Do watermelon plants like coffee grounds?

Coffee Grinds as Melon Fertilizer? Old coffee grinds really do enhance the flavor of many crops, cantaloupe, tomatoes, melons. No study to prove it, but it is said you get bigger melons if you use coffee grinds. As they break down, the grinds will release nitrogen into the soil.

How long does it take to grow watermelon?

Watermelons require 80-90 days from seed sowing to grow a full-size watermelon. Some smaller-sized watermelons (like Sugar Baby) can reach maturity in closer to 70 days.

Article first time published on

Can you overwater a watermelon plant?

Watermelons will grow best in soil that is moist but not overly wet. In any case, overwatering can result in crown and root rot, which can affect the fruit production. When watering watermelons, it’s essential to water at the base of the vine.

How do I make my watermelon sweeter when growing?

Heat brings out melons’ sweetness, so make sure to plant them in a location that warms up early in spring and stays hot through the end of September. The south side of a fence or wall is ideal as the structure will absorb heat and light from the sun and reflect it back onto the melons.

Why are my watermelon plants turning yellow?

Yellowing Leaves in Watermelon Nitrogen Deficiency – Both young and old leaves can show signs of nitrogen deficiency and may appear any shade of lighter green to yellow. This is common during both dry spells and when plants simply aren’t being fed enough.

How do watermelons grow for beginners?

Watermelons require a large vegetative-free space located in full sun and with well-drained soil that’s reached a minimum of 65 degrees Fahrenheit for proper germination and growth, according to The Old Farmer’s Almanac. Because they are heavy feeders, amend the site with compost or well-rotted manure before planting.

What kind of soil does watermelon like?

Watermelons grow in many kinds of soil, but prefer a light, sandy, fertile loam that drains easily. Add generous amounts of manure, compost and leaves to your garden and work the soil well prior to planting. Melons like lots of water, so keep the soil moist at all times.

Where do watermelons grow best?

They grow best when daytime temperatures fall between 70 and 80 degrees Fahrenheit, and nighttime temperatures fall between 65 and 70 degrees Fahrenheit. They can thrive in both humid and semi-arid environments, but may develop fungal foliage diseases in humid areas more frequently than in dry areas.

Do watermelons need a trellis?

As the vines, which should be about two feet apart, begin to run, send them up a sturdy trellis. You will need to tie the runners to the trellis, since watermelons are not natural climbers. … Watermelons don’t climb by habit, but once shown the way they can rise with the best. Watermelons rest easy in hammocks.

Do you have to replant watermelon every year?

As annual plants, watermelons (Citrullus lanatus) must be replanted every season and will not survive the winter either as seedlings or fully grown plants. Watermelons require warm weather to grow quickly and produce their sweet, juicy fruit.

What is the easiest fruit to grow?

  1. Bell Peppers. Gardening & Healthy Living. …
  2. Blackberries and Raspberries. …
  3. Cabbage. …
  4. Cucumbers. …
  5. Garlic. …
  6. Strawberries. …
  7. Tomatoes. …
  8. Zucchini and Squash.

Can you plant watermelon seeds directly in the ground?

You can plant those seeds, and they may grow into a watermelon (though not always), but the result won’t be the same type of watermelon you purchased and enjoyed months ago. … To dry your seeds, place them on a towel or some newspaper in a sunny spot (a window sill will do) for about a week.

Are eggshells good for watermelons?

Many foods you eat, from celery to egg shells, can go into a compost pile or bin to create food scrap compost. Naturally, the food scraps have high nutrient levels perfect for a growing watermelon. … Salts pull water from the soil and watermelon plant.

Is Epsom salt good for watermelon plants?

For sweeter watermelons and cantaloupes when the plant starts vining and again when small 1-inch melons appear, spray with 6 1/2 tablespoons Epsom salts and 3 1/2 tablespoons borax in 5 gallons of water. For more fruit on your pepper plants, fertilize the plant by burying an open one-half pack of book matches near it.

Do watermelon plants need lime?

Raising pH In some cases, you may find yourself needed to correct an extremely acidic part of your property to make it suitable for melon growing. Garden-grade ground limestone is a traditional amendment for raising soil pH. … As with high pH levels, it’s best to add limestone at least three months prior to planting.

How do you keep melons off the ground?

Use a cage, plastic mulch, stakes, straw mulch or other materials to protect the fruit from the ground. You can even use a wooden board for the fruit to rest on as it matures.

What nutrients do watermelons need?

Once the plant begins flowering, however, switch to feeding the watermelon a phosphorus and potassium based fertilizer. Watermelons require ample potassium and phosphorus for optimal melon production.

Why do my watermelons keep dying?

More often than not, watermelon blossom end rot occurs when water levels are fluctuating during fruit initiation. A steady supply of water is required to move calcium to these young fruits, but too much isn’t good, either – good drainage is necessary for healthy roots.

How long after flowering do watermelons appear?

Once a small watermelon reaches the size of a golf ball you can be sure it has been successfully pollinated and it will grow into a full size watermelon in 30-40 days. It takes 6 or 7 weeks after the first flower appears on the watermelon plant until mature watermelons grow and are ready for harvest.

How do you speed up the growth of a watermelon?

To maximize the size of the melons, water the plants at the base in regular, deep-watering sessions that keep the soil moist. Side dress the watermelon plants with fertilizer designed for edible crops or compost tea to feed the plants. The fertilizer encourages growth to get larger melons.

Can watermelon survive winter?

No, watermelons cannot survive frost. Freezing temperatures will cause the fruit to wither and die on the vine. A watermelon covered in frost, even for a short period of time, will turn mushy and inedible.

Why are my watermelons cracking?

Causes of Watermelon Splits The most common cause for a bursting watermelon is erratic watering. Whether it’s due to poor irrigation practices or drought followed by heavy rain, excessive accumulation of water can put the fruit under a lot of pressure. … As a result, the watermelon bursts.

Can you grow melons in pots?

While you can grow full-size melons in containers, you’ll get the best results with dwarf cultivars that produce smaller fruits and shorter vines.