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Butternut Squash is the most popular winter squash in North America — a tan-skinned, pear-shaped fruit with deep-orange flesh that has a sweet, nutty, slightly caramel-like flavor that intensifies dramatically after curing. A single well-grown Butternut plant can produce 10–20 pounds of fruit, and each squash stores remarkably well at room temperature for 3–6 months, providing a nutritious kitchen staple through late autumn and winter. The flesh is smooth, dense, and fine-grained with none of the stringiness of acorn or spaghetti squash — ideal for soups, roasted sides, risottos, pasta fillings, and curries. Butternut squash is also one of the most nutritionally dense vegetables, providing exceptional amounts of beta-carotene, vitamin C, potassium, and magnesium in each serving.
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Direct sow Butternut squash seeds outdoors after last frost in warm soil (65°F minimum), planting 1 inch deep. Standard vining types need 6 feet in all directions; grow in hills of 2–3 seeds with 6-foot spacing, thinning to the strongest 2 plants. Bush varieties can be spaced 3–4 feet apart. Apply 2–3 inches of straw mulch to conserve moisture and keep fruits off the soil. Water deeply once or twice weekly — Butternut is relatively drought-tolerant once established but produces more and larger fruit with consistent moisture during fruit development. Feed with a balanced fertilizer at planting and again when vines reach 2 feet. Butternut matures in 80–100 days. The key harvest indicator: the skin turns from shiny green to tan-beige and the stem connecting the squash to the vine turns brown, dry, and corky. Do not harvest until the stem is fully dry — premature harvesting results in squash that rots within weeks rather than months. After harvesting, cure at 80–85°F for 10–14 days to harden the skin, seal any cuts, and convert starches to sugars. Cured Butternut stored at 50–55°F with good airflow will keep 4–6 months. Always leave 2 inches of stem when harvesting; stemnless squashes rot from the entry point.
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Squash (Butternut) grows across 13 USDA hardiness zones. Explore the catalog for any of them: