45-50 Days to maturity. Cucurbita pepo. Storrs Green F1 Hybrid Zucchini Summer Squash Vegetable Seeds. Non-GMO, annual, F1 hybrid. A very early, medium green variety with sweet flesh and few seeds. The cylindrical fruits have a slight taper at the stem end and are best harvested at about 5-6 inches long. A single stemmed, open bush variety that is well suited to short season areas - popular in northern Europe.