Cucumber Seeds, Japanese - Progress - Hybrid - Cucumis sativus Non-GMO -- F1 Hybrid -- Asian Variety -- High Germination Rate Seeds For: Vegetable Gardening Days to Full Maturity: 50 to 60 -- Annual -- USDA Hardiness Zone: Annual Crop, Not Intended To Overwinter Kitazawa Seed Company Brand - Premium Quality Asian Variety Garden Seeds & More - Since 1916 Progress Japanese Cucumber Seeds. F1 Hybrid. Non-GMO. Cucumis sativus About 1100 seeds per Oz. Cucumis sativus. 50 to 60 days to maturity. Annual. This excellent hybrid, Japanese cucumber has smooth, glossy, green skin and tasty, crisp, burpless flesh. The quality fruits mature to 8" long and 1" in diameter. Vigorous, high yielding plants are very heat tolerant and disease resistant to downy mildew, powdery mildew, anthracnose, and CMV. It grows well in the open field and has a monoecious flowering habit (plant produces both male and female flowers) and sets many female flowers. Prepare fertile, well-drained soil. Sow seeds in late spring/early summer after last frost in a warm, sunny location. Or start seeds indoors and transplant when weather warms. Keep soil moist. Fertilize as needed. Optimum growing temperatures are 75°F daytime and 60°F at night. Train to climb a vertical support for better air circulation, straighter fruits, and ease of harvest. Used for pickling or salads. ~1100 seeds / ounce.