What characteristic distinguishes summer squash from mature winter squash?

Summer squashes are picked immaturely, resulting in tender skin and higher water content.

The primary distinction between summer squash varieties, such as Gold Rush, and winter squashes (like butternut or acorn) lies in their stage of harvest. Summer squashes are picked while still immature, which results in characteristic features like tender, edible skin and a flesh composition that is significantly higher in water content. In contrast, winter squashes are allowed to fully mature on the vine; this maturation process leads to the development of harder rinds, denser flesh, and a consequently higher starch content. Due to this difference in maturity, winter squash often surpasses summer squash in the concentration of Beta-Carotene, while summer squash may provide a better boost of Vitamin C.