Cucurbita maxima (Winter Squash)

Cucurbita maxima is a vining annual squash species domesticated in South America that includes Hubbard, buttercup, and Marina di Chioggia varieties. It is also the species responsible for the massive squashes grown for giant pumpkin competitions. These squashes are known for their thick, hard skins.

Giant pumpkin competitions focusing on Cucurbita maxima have produced fruits exceeding 1,000 kg in recent decades. This makes the species the largest fruit-producing plant in the entire plant kingdom. Growers use specialized crossbreeding and pruning techniques to achieve these massive sizes.

Compared to Cucurbita pepo, which includes zucchini and standard pumpkins, Cucurbita maxima generally has a softer, spongy stem rather than a deeply ridged, woody one. The leaves of Cucurbita maxima are also typically much larger and more rounded. The fruit flesh is usually denser and sweeter.

As a winter squash, Cucurbita maxima should be harvested at the very end of the growing season once the skin has hardened completely. Unlike summer squashes, these fruits develop a thick rind that allows them to be stored for months in cool conditions. The stems should be completely dry before cutting.