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Buttercup Squash

Buttercup Squash

$5.00
Pack Size
Out of Season
This variety is currently out of season. Pre-orders for next season will begin starting November 1.

Buttercup squash produces blocky, dark-green fruits with a small gray “button” on the blossom end and dense, sweet orange flesh. The flavor is rich and nutty, closer to a sweet potato than a watery squash, and it is excellent baked, roasted, mashed, or used in soups and pies. This variety is a good choice for Utah because it is a reliable winter squash that can finish in our hot, dry summers and shorter high-elevation season when transplanted after the soil is warm. Give it room to vine and consistent moisture, and a couple of plants will store well into fall and winter.

Days to Maturity: Approximately 90-100 days from transplant to harvest (often 95 days typical).

Sun Needs: Full sun with at least 6-8 hours of direct sunlight daily—essential for fruit set, size, and ripening in Utah’s intense summer light.

Season Type: Warm-season crop; frost-sensitive—transplant only after soil warms to 65°F+ and all frost danger has passed (late May to early June in the Salt Lake City area).

Plant Habit & Support: Vining plants spread 6–10 feet; no trellis required, but vines can be trained to stay in bounds—space plants 3–4 feet apart.

Other Notes: Harvest when the rind is hard and the stem is dry; watch for squash bugs and powdery mildew—organic mulch (like straw or compost) helps retain moisture and keep fruit clean.

Best Planting Method: Transplant when nights stay above 55°F and soil is warm. Space plants 3–4 feet apart in rows or hills; plant at the same depth as in the pot. Amend soil with compost for fertility and excellent drainage—raised beds help in heavier or alkaline Utah soils. Organic mulch (such as straw, compost, or grass clippings) around plants conserves moisture, suppresses weeds, and keeps developing fruit off bare soil.

Watering Needs: Provide consistent, deep watering (1–2 inches per week), especially during flowering and fruit swell—drip irrigation is ideal in dry Utah air to keep foliage dry and reduce disease. Avoid wetting leaves late in the day. Mulch helps maintain even moisture.

Fertilization Needs: Incorporate compost or balanced fertilizer at planting. Side-dress with a higher-phosphorus/potassium formula when vines begin to run and again when fruits set. Avoid excess nitrogen, which produces lots of leaves and fewer squash. Harvest when the rind is hard and cannot be easily pierced with a fingernail—cut with a few inches of stem attached and cure in a warm, dry spot for 10–14 days before storage.

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