FB-CALIFORNIAN BUTTERNUT F1 Hybrid Squash is a high-performing butternut pumpkin hybrid featuring moderately vigorous vine growth and excellent fruit quality. The plants produce attractive slim pyriform-shaped fruits with smooth tan-yellow skin and vibrant orange flesh. Fruits weigh approximately 1.0–1.2 kg and contain a compact seed cavity located at the blossom end, resulting in a high proportion of edible pulp. This hybrid matures in 65–70 days and is valued for its sweet taste, rich nutritional content, and excellent cooking quality. A key advantage is its outstanding storage ability, with whole fruits remaining marketable for 6–9 months under ambient conditions, making it ideal for long-distance transport, extended marketing, and commercial cultivation.