All squash fall under the Cucurbita genus. The main species of cucurbits are:
- pepo: acorn squash, delicata, summer squash, Dark Zucchini, Triumph Zucchini, Patty Pan
- maxima: buttercup, Hubbard, kabocha, giant pumpkins, Lakota Winter Squash
- moschata: butternut, most pumpkins, Honeynut Winter Squash
Cucurbita moschata is generally the easiest to grow. Cucurbita maxima are generally the hardest.