Kabocha Squash

Kabocha squash (Cucurbita maxima) is a warm-season annual vine that trails along the ground or climbs using tendrils. It has large yellow flowers and large leaves that are often rough and prickly. Left unchecked, it can scramble up to 5 metres (about 16 feet) long. The vine is an aggressive grower and suits large spaces, but it also performs well in vegetable gardens and on trellises.

Sowing. Start from seed when the soil is warm, since the seed is easily sown in those conditions. You can also transplant it in late spring, early summer, or after the last frost.

Site and soil. Grow it in rich, fertile, well-drained soil in full sun. The soil should be neutral, with a pH of 6.0 to 8.0.

Watering. Keep the soil moderately moist.

Pruning. No pruning is required for this plant.

Pests. Slugs, aphids, and beetles are the listed pests. The plant may be susceptible to slugs and snails.

Diseases. It may be susceptible to grey moulds and powdery mildews.

The fruits are harvested in the fall. They are soft or hard-shelled berries called pepos, which come in many colors, shapes, and sizes. The mild-flavored fruit can be fried, baked, added to pasta, or used in soups.

The page lists this plant as non-toxic to cats and dogs. Don’t eat fruit that tastes bitter, and don’t feed it to pets. Wear gloves and other protective equipment when handling the plant.