25 Tromboncino Squash Seeds for Planting - Italian Heirloom Climbing Zucchini

Tromboncino squash is a classic Italian heirloom prized for its long, curved, trumpet-shaped fruit and vigorous climbing habit. This versatile summer squash can be harvested young as a tender zucchini or allowed to mature into a firm, nutty winter squash. Its vining growth makes it an excellent choice for trellising, saving garden space while adding vertical interest.

Easy to grow and highly productive, Tromboncino is a favorite among home gardeners for its adaptability in the kitchen and garden. Whether you're growing on a trellis or letting it sprawl, this Italian heirloom delivers abundant harvests and unique, eye-catching fruit.

Plant Features

• Vigorous climbing vine habit, ideal for trellising
• Long, curved fruit with pale green to beige skin
• Dual-purpose: harvest young as summer squash or mature as winter squash
• Italian heirloom variety with rich, nutty flavor
• Productive plants provide abundant yields throughout the season

Growing Information

• Botanical Name: Cucurbita moschata
• Plant Type: Annual vegetable
• Sunlight: Full sun
• Soil: Well-drained, fertile soil rich in organic matter
• Water Requirements: Moderate; keep soil consistently moist
• Growth Habit: Climbing vine
• USDA Hardiness Zones: 3-11 (grown as annual)
• Days to Maturity: 60-70 days for young fruit; 90-100 days for mature squash
• Spacing: 24-36 inches apart; provide trellis or support

Planting & Care

Sow Tromboncino seeds directly outdoors after the last frost date, when soil has warmed to at least 70°F (21°C). Plant seeds 1 inch deep in hills or rows, spacing 24-36 inches apart. For earlier harvests, start seeds indoors 2-3 weeks before the last frost in biodegradable pots to minimize root disturbance. Provide a sturdy trellis or fence for the vines to climb.

Keep soil evenly moist but not waterlogged, and mulch to retain moisture and suppress weeds. Fertilize lightly when vines begin to run. Harvest young fruit frequently to encourage continued production; for winter squash, allow fruit to mature on the vine until skin hardens. Monitor for common pests like squash bugs and cucumber beetles.

What's Included

25 Tromboncino Squash Seeds