Cucurbita pepo 45 days. Smooth Criminal will keep you stocked with a wealth of buttery yellow, straightneck squash from very early in the season until frost. Beautifully uniform fruit is prime at about 6 inches long with creamy white flesh. Thanks to an almost spineless plant and unusual, upright habit there’s no need for stealth during harvest either, as the leaves and stems leave no trace on bare skin (human or squash).