Squash is picked at different times depending on the type:

• Summer squash, which includes varieties with thin, tender skins like zucchini and patty pan, should be picked while still small and tender, typically around 6 to 8 inches long. Picking summer squash early ensures better flavor and encourages the plant to produce more fruit. Frequent harvesting throughout the summer is recommended.

• Winter squash, like butternut, acorn, and pumpkins, should be harvested when fully mature, often right before the first frost. The skin turns deep in color and hard enough that it cannot be dented with a fingernail. Other signs include a hollow sound when tapped, a thick tough skin, and a stem that starts to dry out and harden. Winter squash is generally harvested once at the end of the growing season and then cured for longer storage.

In summary, pick summer squash small and frequently during the summer; pick winter squash mature, usually near the time of first frost, judging by skin hardness, color, and stem condition.