How To Grow Jubilee Watermelon

To grow Jubilee watermelon, you need to give the vines plenty of sun, consistent moisture, and a long warm season.
 
It’s a classic picnic variety known for its sweet, crisp, bright red flesh and tough rind, so it’s a rewarding crop if you get the basics right.
 
If you’ve been wondering how to grow Jubilee watermelon from seed to harvest, the good news is that it’s not complicated once you understand what this plant wants.
 
In this post, we’ll walk through how to grow Jubilee watermelon step by step, including planting, watering, feeding, and knowing exactly when to pick it.
 
Let’s dig in.
 

How to Grow Jubilee Watermelon: The Basics

Growing Jubilee watermelon successfully starts with understanding its habits and needs.
 
Jubilee is a large, oblong watermelon that typically matures in about 90 to 100 days, so it needs a long growing season.
 
It loves heat, hates cold soil, and performs best when you plant it after the last frost date in your area.
 
Here’s what matters most when you grow Jubilee watermelon:
 

1. Pick the Right Spot with Full Sun

Jubilee watermelon vines need at least 8 to 10 hours of direct sunlight every day.
 
The more sun they get, the more energy they have to produce big, sugary fruit.
 
Choose a spot that gets full sun all day and isn’t shaded by trees or buildings.
 
Good airflow also helps prevent fungal diseases, which can be a problem in humid areas.
 

2. Prepare Rich, Well-Draining Soil

Watermelons like loose, fertile soil that drains well but still holds some moisture.
 
A sandy loam works great, but you can also amend heavy clay with compost and aged manure.
 
Aim for a soil pH between 6.0 and 6.8 for the best results.
 
If you want to grow Jubilee watermelon in containers, use a large pot (at least 20 gallons) filled with a quality potting mix.
 

3. Start Seeds Indoors or Direct Sow

In short-season climates, start Jubilee watermelon seeds indoors about 3 to 4 weeks before your last frost date.
 
Use biodegradable pots so you don’t disturb the roots when transplanting, because watermelons hate root shock.
 
In warm climates, you can direct sow seeds once the soil temperature is consistently above 70°F.
 
Plant seeds about 1 inch deep, spacing them 2 to 3 feet apart in rows that are 6 to 8 feet apart.
 

How to Care for Jubilee Watermelon as It Grows

Once your plants are in the ground, the work shifts to watering, feeding, and protecting the vines.
 
If you want to grow Jubilee watermelon that’s sweet and heavy, these care steps are non-negotiable.
 

1. Water Deeply and Consistently

Watermelons need about 1 to 2 inches of water per week, including rainfall.
 
Water deeply at the base of the plant rather than overhead, because wet leaves invite disease.
 
Consistency matters most during flowering and fruit development, since uneven watering can cause blossom-end rot or cracked fruit.
 
Once the fruit starts ripening, you can cut back slightly on water to concentrate the sugars.
 

2. Feed with Balanced Fertilizer

Start with a balanced fertilizer or compost at planting time.
 
When the vines begin to run, switch to a fertilizer that’s lower in nitrogen and higher in phosphorus and potassium.
 
Too much nitrogen gives you giant leafy vines and tiny fruit, which is the opposite of what you want when you grow Jubilee watermelon.
 
Side-dress with compost or a liquid organic feed every 3 to 4 weeks during the growing season.
 

3. Manage Pests and Weeds

Keep the area around your plants free of weeds, because weeds compete for water and nutrients.
 
Mulching with straw or black plastic helps suppress weeds and keeps the soil warm.
 
Watch for common pests like aphids, cucumber beetles, and squash bugs, and treat them early with insecticidal soap or neem oil.
 

4. Hand-Pollinate if Needed

Bees usually handle pollination, but if you notice few pollinators, you can hand-pollinate.
 
Pick a male flower, remove the petals, and gently brush the pollen onto the center of a female flower.
 
This simple step can make a huge difference in how many Jubilee watermelons you harvest.
 

When and How to Harvest Jubilee Watermelon

Knowing when to pick your Jubilee watermelon is the difference between a bland, watery melon and a sweet, juicy one.
 
Here are the signs that your Jubilee watermelon is ready:
 

1. The Tendril Nearest the Fruit Dries Out

Look for the small curly tendril on the vine right next to where the fruit attaches.
 
When that tendril turns brown and dry, the watermelon is usually ripe.
 

2. The Bottom Spot Turns Creamy Yellow

Roll the melon over and check the field spot, the spot where it rested on the ground.
 
If it’s creamy yellow or pale orange instead of white or green, it’s ready.
 

3. The Rind Loses Its Shine

A ripe Jubilee watermelon has a dull, slightly matte rind rather than a shiny one.
 
The skin also becomes tougher and harder to scratch with your fingernail.
 

4. It Sounds Hollow When Thumped

Give the melon a firm thump with your palm.
 
A ripe watermelon gives a deep, hollow sound, while an unripe one sounds dull and flat.
 
Cut the fruit from the vine with a sharp knife, leaving a short stem attached, and enjoy it fresh or chilled.
 

So, How to Grow Jubilee Watermelon?

To grow Jubilee watermelon, give it full sun, warm soil, consistent water, and plenty of space to sprawl.
 
Start seeds indoors or direct sow after the last frost, feed the vines carefully, and watch for pests.
 
Then harvest when the tendril dries, the field spot turns creamy, and the rind sounds hollow when thumped.
 
Follow these steps, and you’ll grow Jubilee watermelon that’s sweet, crisp, and perfect for summer.