Cool season vegetables do not include any winter squash. All squash are warm season vegetables. They all begin their growing season in early spring to grow through summer. Their foliage begins to fade by autumn, and then succumbs to winter chill.
The difference between summer and winter squash is their harvest time. Winter squash ripen for winter.
Conversely, summer squash produce for summer. They produce several more individual fruit that are ready for harvest before they ripen. They produce even more in response to the harvest of their juvenile fruit.
Any fruit that matures for too long can get big and tough. It also diverts resources that should otherwise sustain production of fresh young squash.
Winter squash produce fewer fruit that mature through summer to ripen by autumn.
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