60-70 days. Organic Black Beauty Zucchini Summer Squash Seeds. Non-GMO. Organic. One of the most productive crops to ever find its way into the home garden, Organic Black Beauty zucchini summer squash seeds will produce vigorously well up until the frost. Harvest Black Beauty zucchini often as fruits are most tender and delicious when about 6-8", but seeds quickly grow 18-24" long if left in the garden even for a few extra days. Buy Seeds Online Organic Seeds Heirloom Seeds Non-GMO Seeds Vegetable Seeds Flower Seeds Herb Seeds Fruit Seeds Garden Seeds Seed Starter Kits Rare Seeds Bulk Seeds Indoor Gardening Seeds Seed Catalog Seed Packs for Sale Sustainable Seeds Greenhouse Seeds Seed Suppliers Planting Seeds Home Garden Seeds