Cucurbita pepo 'Acorn'
Acorn Squash
Open-pollinated; the species C. pepo is native to North America (Mexico and southeastern US)
Overview
Cucurbita pepo 'Acorn' is acorn squash (pepper squash), a trailing vining annual growing 12-24 inches (30-60 cm) tall and 72-120 inches (180-300 cm / 6-10 feet) wide. Ribbed acorn-shaped (turbinate) winter squash 5-7 inches (13-18 cm) long and 4-5 inches (10-13 cm) diameter, weighing 1-2 pounds (0.5-0.9 kg). Dark green rind with deep longitudinal ribs — the ribbed acorn shape is the cultivar's defining trait. Golden-orange flesh, finer-grained than butternut. Bright yellow funnel-shaped flowers — separate male and female on the same plant (monoecious). Dark green large palmate rough-textured foliage with coarse bristly hairs. In the gourd family (Cucurbitaceae). Same species as zucchini (C. pepo). Angular stems (pentagon cross-section) distinguish C. pepo from C. maxima (round stems). Open-pollinated — cross-pollinates with other C. pepo types (zucchini, pattypan). Requires bee pollination — poor pollination causes misshapen fruit. Squash vine borer (Melittia cucurbitae) and powdery mildew are primary pests/diseases. Vines need 6-10 feet (180-300 cm) of run — a limitation for small gardens. Stores 2-3 months at 50-60°F (10-16°C). Non-toxic (edible crop — flowers, seeds, young leaves also edible). Not deer-resistant. Tender annual. Full sun. Growth rate is fast.
Native Range
Open-pollinated. The species C. pepo is native to North America (Mexico and southeastern US).Suggested Uses
Grown in vegetable gardens with ample space (6-10 feet / 180-300 cm vine run). Winter squash — stores 2-3 months. Shorter season than most winter squash (80-100 days). Open-pollinated. Non-toxic. Tender annual.How to Identify
Appearance
Size & Dimensions
Height1' - 2'
Width/Spread6' - 10'
Reaches mature size in approximately 1 years
Bloom Information
Summer (June-August). Bright yellow funnel-shaped flowers 3-4 inches (7-10 cm). Monoecious: separate male and female. Bee-pollinated. Fruit matures 80-100 days from direct sow.Detailed Descriptions
Flower Description
Bright yellow, funnel-shaped, 3-4 inches (7-10 cm) diameter; monoecious (separate male and female flowers on the same plant)Foliage Description
Dark green, large palmate, 8-12 inches (20-30 cm) wide, rough-textured with prominent veining and coarse bristly hairsGrowing Conditions
Sun Requirements
Requires 6-12 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight
Care & Maintenance
Care Guide
Full sun (6+ hours). Well-drained soil pH 6.0-7.0. Direct-sow after last frost (65 degrees F / 18 degrees C soil). Space 48 inches (120 cm) with 6-10 feet (180-300 cm) vine run. Requires bee pollination. Squash vine borer and powdery mildew. Harvest when rind is hard and ground spot turns orange. Stores 2-3 months. Non-toxic. Tender annual.Pruning
No pruning needed. Harvest when rind is dark green, hard, and the ground spot turns orange. Leave 2 inches (5 cm) of stem. Cure 1-2 weeks. Remove spent vines after frost.Maintenance Level
moderateContainer Growing
Minimum container size: 10 gallons
⚠️ Toxicity Warning
Non-toxicPlanting Guide
Planting Methods & Timing
Planting Method
direct sow
Indoor Start
3 weeks before last frost
Direct Sow Timing
After last frost when soil temperature reaches 65 degrees F (18 degrees C)+
Days to Maturity
80–100 days
Plant Spacing
48 inches