Does it need a trellis?

Yes, it is a vigorous climber and benefits greatly from a strong trellis.

Can I grow it in a pot?

It is possible in a very large container, but it prefers being in the ground.

Plant guide

Winter Melon.

Benincasa hispida

Pronounced ben-in-KAH-suh HISS-pih-duh

Also known as Chinese preserving-melon, Chinese-watermelon, Waxgourd, Winter Melon, ash gourd, ash-pumpkin

Winter melon is a vigorous vining plant grown for its large, waxy fruits. It thrives in warm climates and is a staple in many traditional dishes. You will love how productive these vines can be in your garden.

At a glance

Care level: Moderate
Plant type: Annual vegetable
Light: Full sun
Indoor light: Direct sun
Water: Every 2 to 4 days
Mature size: 10 to 15 feet
Growth rate: Fast
Hardiness: USDA 9 to 11
Bloom time: Mid to late summer

Care

Provide a sturdy trellis for the heavy fruits to climb and develop properly. Keep an eye out for powdery mildew on the leaves during humid weather. Ensure the soil stays consistently moist but not waterlogged.

Watering: Keep the soil evenly moist throughout the growing season.
Feeding: Apply a balanced liquid fertilizer every two weeks once flowering begins.
Pruning: Trim back excessive side shoots to encourage better fruit production.
Repotting: This plant is typically grown directly in the garden soil.
Soil: Well draining, fertile loam
Soil pH: 6.0 to 7.0
Temperature: 15 to 35°C
Humidity: 60 to 90%
Drought tolerance: Low
Lifespan: Annual, typically one growing season.
Deer and rabbits: Moderate

Signs it needs repotting

Roots growing out of drainage holes
Stunted growth despite regular feeding

Safety

People: The plant is non-toxic and widely used in culinary applications.
Children: The prickly hairs on the stems can scratch delicate skin, so keep children away from the vines.
Contact allergens: The stems and leaves are covered in stiff, prickly hairs that can cause skin irritation upon contact.
Airborne allergens: There are no notable respiratory allergens associated with this plant.
Edibility: The fruit is widely consumed cooked, but ensure it is harvested at the proper maturity for the best texture.

How to identify it

Large, fuzzy, heart shaped leaves
Yellow, five petaled flowers
Large, oblong, waxy green fruit
White, crisp flesh inside
Vigorous, climbing vine habit

Height: 0.3 to 3m
Spread: 2 to 6m
Leaves: green, deciduous
Flowers: yellow, 5 to 10cm
Fruit: green, white, Autumn

Problems to watch for

AphidsCommon
Cucumber BeetleCommon
Powdery MildewCommon
Blossom End RotUncommon
Downy MildewUncommon
Fruit RotUncommon
Root RotUncommon
Squash Vine BorerUncommon

By symptom

Plant problems by symptom

Check your winter melon from a photo

Pocket Botanist looks at a photo of your plant and tells you what's wrong and what to try first.

Growing it

Propagation: seed
When to plant: Spring
Overwintering: This plant is a frost sensitive annual that will die back completely once temperatures drop.
In containers: It requires a very large container of at least 40 liters to support its vigorous growth.

Seed

1. Soak seeds in warm water for 12 hours.
2. Plant in well draining soil.
3. Keep warm until germination.

Plant near tall, sturdy crops that can support the heavy weight of the developing fruit.

Grows well with

Corn · Corn can give young vines some light support, but the heavy fruits still need a sturdy trellis or should rest on the ground.
Nasturtium · Nasturtiums act as a ground cover to suppress weeds around the base.

Similar species

Cucumber · Both are members of the same family and share similar growth habits.
Pumpkin · They share similar requirements for space and nutrient rich soil.

Science

Family: Cucurbitaceae
Genus: Benincasa
Order: Cucurbitales
Class: Magnoliopsida
Native range: Tropical and subtropical Asia.
Conservation: This species is widely cultivated and not of conservation concern.

It thrives in warm, humid environments where it can climb over other vegetation to reach sunlight.

Value to wildlife: nectar source
Pollinators: bees, butterflies
Uses: culinary, traditional medicine, ornamental

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 2/9
Soil reaction: 6/9
Light: 8/9
Temperature: 8/9
Moisture: 7/9
Nutrients: 7/9

Taxonomy resolved against GBIF.

Questions people ask

Does it need a trellis?: Yes, it is a vigorous climber and benefits greatly from a strong trellis.
Can I grow it in a pot?: It is possible in a very large container, but it prefers being in the ground.

Where the name comes from

The specific epithet hispida refers to the bristly hairs covering the plant, while the common name wax gourd describes its unique waxy skin.

Good to know

The fruit is often called winter melon because it can be stored through the winter.
It is a staple ingredient in many Asian soups and stir fries.
The waxy bloom on the skin is a natural defense against moisture loss.

Keep your winter melon growing

This page is a general guide. Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked.

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This guide was generated with AI on September 26, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.