• a long yellow Tromboncino summer squash growing in a garden setting
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Tromboncino Summer Squash Seeds by West Coast Seeds (Cucurbita moschata)

Tromboncino Summer Squash Seeds by West Coast Seeds (Cucurbita moschata)

Tromboncino Summer Squash (Cucurbita moschata), also known as Zucchetta Rampicante, is a distinctive heirloom squash variety recognized for its exceptionally long curved fruits. The plants produce vigorous climbing vines that develop pale green squash which may grow over 60 cm long if left to mature. When harvested young, the fruits have tender flesh, thin skin, and a mild flavor similar to zucchini.

In vegetable gardens, Tromboncino squash grows as a vigorous vine that benefits from trellising or vertical supports. Training the vines upward helps produce straighter fruits and improves air circulation around the plants. The squash are typically harvested young for use in sautés, roasting, grilling, and fresh vegetable dishes, though mature fruits can develop a firmer texture similar to winter squash.

Tromboncino is a traditional Italian heirloom squash valued for its unique shape, climbing growth habit, and reliable harvest. This listing is for seed packets only and does not include live plants.

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Sun Requirements ▾

Tromboncino squash performs best in full sun where plants receive strong direct light for most of the day. Adequate sunlight encourages vigorous vines and high fruit production. Partial shade may reduce yields and slow plant growth.

Watering Instructions ▾

Maintain consistently moist soil to support vigorous vine growth and fruit development. Water when the soil surface begins to dry while avoiding saturated soil conditions. Consistent moisture is especially important during flowering and fruit formation.

Care Tips ▾

Tromboncino squash grows best in fertile, well-draining soil enriched with organic matter. Warm temperatures and stable growing conditions support vigorous vine development and steady fruit production. Moderate humidity and loose soil structure help maintain strong root systems and healthy plant growth. Sow Tromboncino summer squash seeds directly outdoors after the last frost once soil temperatures reach approximately 18–24°C. Seeds typically germinate within 5–10 days in warm soil. Fruits are generally harvested in about 50–60 days when still young and tender, typically around 20–30 cm long, though they may grow much larger if left on the vine.
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