- The most popular butternut squash with a uniform shape, few crooknecks, and no stringiness.
85-90 days. Waltham Butternut Winter Squash seeds grow as cool season tender annuals that are fast-maturing. As the summer season fades, butternut squash varieties are the most popular winter squash for gardeners to plant everywhere. Waltham Butternut Squash can be enjoyed as a sweet or savory dish by baking its velvety texture with cinnamon or making a rich butternut soup. As Waltham Butternut varieties yield an abundant crop, winter squash develops their oval bell-like shape with bright-orange flesh and tan exterior. As the holidays approach, store your squash for months over winter by curing them before the first frost.