Burgess Buttercup Squash Seeds. This heirloom winter squash has 3-5 pound fruit with dark green skin and flecks of light gray. Burgess Buttercup Squash produces fruit that is a round, flat, turban shape. Burgess Buttercup Squash fruit has thick, low fiber, orange flesh that is very sweet. The flesh of Burgess Buttercup Squash cooks dry and flavorful. Great baked or in soup. Like other winter squash, Burgess Buttercup Squash store for months to feed you through winter. 110 days until harvest. Packet contains approximately 25 seeds grown naturally with love and care. Happy Planting! We have a wide variety of Heirloom Vegetable, Herb, and Flower Seeds for sale. With all of our seeds: Your first packet ships for $2.50. All additional packets ship free. So your total shipping on a seed order is $2.50 no matter how many packets you order.