How to grow Kabocha squash

Kabocha squash growing herbaceous creeping vine of the genus Cucurbita also known as Kabocha or Japanese pumpkin, Kabocha squash annual plant also used as ornamental fruit, can grow in mediterranean, subtropics, temperate or tropics climate and growing in hardiness zone 4+.

Leaves color green in round or heart shape with lobes.

Flower color is yellow, there are female and male flower.

Kabocha squash fruits

Fruits color dark green some can be with light green or orange, the shape round-top shape, weight is 1-3.5 Kg, and size 10-18 cm.

Seeds are white and edible after cooking.

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Requirements for Kabocha squash growing and care:

Recommend to watering on the ground and not watering on the leaves or the fruits, sometime need trellising but not must can grow as creeping vine

What is the best way to start growing?
Seedling / Seed

Is it necessary to graft or use vegetative reproduction?

Difficulties or problems when growing:
Attacked easily, when the plant attacked in the base if not treatment well it will die

Planting season:

Pests and diseases:
Powdery mildew, aphids, moth, virus, beetles

Pruning season:
No need. But possible all the season

How to prune:
Infected leaves needed to take out, also try to clean them

Size of the plant?
0.5-1.5 m, 20-60 inches

Growth speed in optimal condition:
Fast growing

Water requirement:
Average amount of water

Light conditions in optimal condition for growing:
Full Sun

Is it possible to grow as houseplant?

Growing is also possible in a planter /flowerpot / containers:

Blooming information

Bloom season:
Late spring

General information about the flower
Yellow flower with five lobs, there are female and male flowers

Thinning the bloom:
Sometimes happened because disease or not enough water, or need hand pollination

Pollination is done by:
Bees and more pollinators, by hand

Edible Fruits

Fruit harvest season:

Fruits pests or diseases:
Powdery mildew

What can be done with big quantities of Kabocha squash fruits?
Cooked, baked, grilled, stir fry, stuffed

Work requirements on the fruit:
Sometimes need to keep it with space from the ground

How long does it take to bear fruit?
100-120 days (3-5 month)

Grow from seeds

Sowing requirement:
Easy to sow no special treatment

Saving seeds until sowing:
Room temperature, dry place

Sowing season:

Planting spacing:
20-30 cm

Depth of Sowing:
1-2 cm from the top

Conditions for seeds germinate:
Moist soil, full sun

Watering requires for Seeds:
Average amount of water

Germination time:
5-20 days

Condition of seedling:
Warm weather, big amount of water, full sun, place to trellising

Do the seeds require burying?

Scientific name:

Cucurbita maxima

Blooming Seasons

Edible Parts

Culinary Uses

Flower Colors


Harvest season

Ornamental parts

Plant growing speed

Plant life-form

Plant uses

Planting season

Plants sun exposure

Watering plants

Hardiness zone