Tromboncino Squash

Cucurbita moschata 'Tromboncino'

vegetable

Tromboncino is an Italian heirloom climbing summer squash, technically a butternut relative (Cucurbita moschata) rather than a true zucchini. Vigorous vines run 10 to 15 ft and can be trained up a sturdy trellis; trumpet-shaped fruits curve and dangle to 36 in. long. Picked young at 8 to 12 in. the flesh is tender, nutty, and cooks like the best zucchini; left to mature and cure, fruits keep like winter squash. Because moschata stems are dense and solid, Tromboncino is essentially immune to squash vine borer, the bug that kills most home-garden zucchinis.

✅ Plant alongside

Good neighbors that attract beneficial insects or deter pests

• Corn — Tall corn paired with squash and beans is the original Three Sisters - corn shades and supports the lower vines
• Beans — Pole beans add nitrogen to the heavy-feeding squash bed and can share the same trellis
• Nasturtium — Trap crop that pulls aphids and squash bugs away from stems and adds edible flowers
• French Marigold — Suppresses root-knot nematodes and is said to repel some cucurbit pests

❌ Keep away from

🛡️ Pest & disease prevention

Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide

• Squash bugs →

  Scout leaf undersides for copper egg clusters and crush them; trap adults under boards laid on the soil

• Squash vine borer →

  Tromboncinos dense moschata stems make it essentially borer-proof - the standout reason to grow this variety where SVB is bad

• Cucumber beetles →

  Cover transplants with floating row cover until flowering, then remove for pollination

• Powdery mildew →

  Trellising keeps leaves off the ground; water at the base and remove the lowest leaves for airflow

🌾 Harvest & storage

For summer-squash use, pick Tromboncino at 8 to 12 in. long, when the curved necks are still slim and the skin is pale green. Cut with shears; the plant produces continuously, and harvesting every other day keeps fruits coming. Left on the vine to mature, fruits enlarge to 24 to 36 in., the skin tans to butternut color, and they cure for winter storage like any butternut.

🥗 Nutrition & benefits

Eaten young, Tromboncino has the same nutrition profile as zucchini - very low calorie (about 17 per 100 g), high water content, and useful vitamin C, vitamin B6, folate, potassium, and manganese. Allowed to mature like butternut, it shifts toward winter-squash nutrition with much higher vitamin A as beta-carotene, more fiber, and meaningful potassium.