Blue Hubbard Squash (Cucurbita maxima) A fantastic storage squash, the prized long-lasting Hubbard squash arrived in New England in the mid 1800’s on a ship from the West Indies. Seeds from the large green squash that originated in South America were obtained by plant breeder, J.H. Gregory from a Miss Hubbard who may have actually selected the unique blue skin feature before him. Blue Hubbard squash is known for keeping up to 6-7 months in regular room storage, if fruits are allowed to fully ripen on the vine. The fruit can weigh up to 40 pounds each, making it a top choice for chefs and large families.