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Melon · Moderate to challenging

How to Grow Ali Baba Watermelon

Citrullus lanatus 'Ali Baba'

Ali Baba Watermelon is a classic heirloom variety known for its vigorous growth and reliable fruit production. Gardeners prize this warm-season crop for its sweet flesh and ability to thrive in full sun across various USDA zones, offering a rewarding harvest after a long growing season.

☀SunFull sun (6+ hours)
💧Water2-3 inches per week, consistent deep watering throughout growing season
📅Harvest100-110 days
🗺Zones5–10
📏Height4-8 inches
Ali Baba Watermelon📷 Wikimedia Commons

Starting Ali Baba Watermelon: indoors or direct sow?

🌾 Sow directly in the garden — Ali Baba Watermelon is not usually started indoors.

Direct sow seeds outdoors only after the last frost date has passed and soil temperatures have warmed sufficiently for germination.

Find your last frost date by ZIP code →

Soil, care & harvest

Prepare loose, well-draining soil with a pH between 6.0 and 7.0 for optimal growth. As a frost-sensitive warm-season crop, you must wait until all danger of spring frost has passed and the soil is thoroughly warm before sowing seeds directly into the garden. Plant seeds about one to two inches deep; they typically take seven to twelve days to germinate once conditions are right.

Space plants nine to ten feet apart to allow vines ample room to spread without crowding. While this variety does not require trellising, consistent deep watering of two to three inches per week is essential for healthy fruit development. Apply a layer of organic mulch around the base to retain moisture and suppress weeds, feeding the soil regularly if growth seems sluggish.

Watch closely for cucumber beetles, squash bugs, aphids, and vine borers, which can damage vines; use row covers early or apply organic insecticides as needed. Prevent fungal issues like Fusarium wilt and anthracnose by ensuring good air circulation and avoiding overhead watering. Harvest fruit roughly one hundred to one hundred ten days after planting when the rind hardens and loses its glossy sheen.

When to Plant Ali Baba Watermelon

Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.

ZoneStart IndoorsDirect SowHarvest
Zone 1 June July – September November – August
Zone 2 May – June July – August November – September
Zone 3 May June – August October
Zone 4 April – May June – July October
Zone 5 April May – July September – October
Zone 6 April May – July September – November
Zone 7 March – April May – June September – October
Zone 8 March April – June August – October
Zone 9 February March – May July – September
Zone 10 January – February March – April July – August
Zone 11 January February – March June – July
Zone 12 January February – March June – July
Zone 13 January February – March June – July

Companion Plants for Ali Baba Watermelon

✓ Good companions

Beans

Fixes nitrogen in soil, provides ground cover to retain moisture

Catnip

Repels ants, aphids, and cucumber beetles more effectively than DEET

Corn

Provides natural windbreak and partial shade, supports beneficial insects

Marigolds

Deters nematodes and cucumber beetles, attracts beneficial insects

Nasturtiums

Acts as trap crop for cucumber beetles and aphids, repels squash bugs

Oregano

Repels cucumber beetles and provides general pest deterrence

Radishes

Repels cucumber beetles and squash bugs, breaks up soil for watermelon roots

Sunflowers

Attracts pollinators essential for fruit set, provides beneficial shade

✗ Keep away from

Fennel

Allelopathic properties inhibit growth and can stunt watermelon development

Potatoes

Compete for similar nutrients and space, may harbor similar fungal diseases

Tomatoes

Heavy feeders that compete for nutrients, attract similar pests like aphids

Nutrition Facts

Per 100g serving (USDA FoodData Central)

30.0kcal
0.61gProtein
0.40gFiber
8.10mgVitamin C
0.24mgIron
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