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Zucchetta Tromboncino Summer Squash (Heirloom, 60 Days)

35 reviews

Italian Heirloom. This tasty zucchini grows like squash and will need a lot of room for its 15’ runners. Light yellow-green fruit is slender with a bulbous end and should be harvested at about 10”. Leaving it on the vine can produce variously twisted squash specimens 3’ long and 6” wide and can be used like a winter squash. A firmer zucchini than we’re used to; flavor is mild and delicious. Can be grown up a very strong trellis. Tolerates squash vine borer. 

20 seeds


Cucurbita pepo

Germination: 4-10 days

Germination Temperature: Optimum soil temperatures 70-85ºF

Seed Sowing Depth: 1/2-1" deep

Sowing Indoors: 3-4 weeks before last frost. Provide 70-85ºF soil temperature. Sow 2-3 seeds per cell/pot. Sowing into individual biodegradable peat/cow pots reduces root damage when transplanting. Transplant 36-48" apart after last frost. 

Sowing Outdoors: Sow after last frost when soil temperature is over 70ºF. Sow a few seeds every 36-48". 

Harvest: Check and harvest a few times a week. Cut or kindly twist off fruit, starting at a 3-4”.

Tips: Plant in fertile soil, amended with compost or well rotted manure and keep well watered. They benefit from growing on black plastic and by using row covers for weed, insect control, and more rapid growth.


Customer Reviews

Based on 34 reviews Write a review
Customer Reviews
4.8 Based on 34 Reviews
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Filter Reviews:
Alan G.
United States United States
I recommend this product
Easy to Grow Great to Eat

I've grown this squash from Pinetree for years. It is a related to butternuts, so it resists borers. It doesn't turn to mush when sauteed or pickled. Give it plenty of room to spread or climb and enjoy. Passable as a winter squash. Would love to see it crossed with a butternut squash.

Pinetree Garden Seeds Zucchetta Tromboncino Summer Squash (Heirloom, 60 Days) Review
Cindy P.
United States United States
I recommend this product
Tasty Vegetable But Only 2 Grew

All seeds grew to beautiful vines, but only produced 2 large squash. Had lots of blossoms that did not result in squash. Perhaps planted too late in season (Early August)? Will try planting earlier. Good news is that they were not damaged by squash bugs that killed my other zucchini!

Lucinda S.
United States United States
I recommend this product

after getting these seeds to grow they have far exceeded my expectations. i put them in several locations around property believe it or not did the best in worst garden soil. the quality is fantastic. the long necks are perfect for spiralizing or sliced lengthwise and used for pasta. salt after cutting let sit 30min rinse ... voila pasta, stir fry, plain ole fried squash or however you can think to use them. the bulb part sliced in half can be stuffed. pasta can be frozen with no loss of integrity. let them stay on vine until outside is creamy colored and now you have winter squash with flavor that very much like that of a butternut squash. AND the dreaded squash worm does not bother them. every leaf puts down a root system where it touches soil so just cut that bad part out, doesn't even slow plant down. supposed to store for 3 to 4 months as winter squash. give plenty of room to wander it goes everywhere.

Carolyn D.
United States United States
I recommend this product
Best zucchini ever!

This is now my go-to zucchini. The plant is a beautiful big, vigorous, climber. The zucs have a firm slightly yellow, firm flesh that sautés up nicely. Don’t let it get too big; pick when the neck gets just over an inch thick.

Pinetree Garden Seeds Zucchetta Tromboncino Summer Squash (Heirloom, 60 Days) Review
United States United States
I recommend this product
Delicious and prolific

This Zucchetta Tromboncino squash grows very long vines and produces a lot of squash that are delicious when small, at which stage they have a solid core and are kind of like a yellow zucchini-type squash, but then they get really big really fast (I mean like 3 feet long) and keep well, at least a month or two in my basement stairwell, and I look like an extremely elongated butternut squash and taste somewhere in between that and a yellow squash. Really interesting squash to grow, very easy and vigorous but the vines get really long so you need plenty of space and/or trellises.

Pinetree Garden Seeds Zucchetta Tromboncino Summer Squash (Heirloom, 60 Days) Review