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SQUASH-TROMBONCINO

SQUASH-TROMBONCINO

A$3.50

Availability: In stock

Seeds Per Pack: 18

Cucurbita moschata
SQUASH-TROMBONCINO Squash, also known as Zucchetto or Zucchetta, is a unique and versatile Italian squash variety loved by gardeners and cooks for its unusual trombone-shaped fruit and rich flavour. Most often used as a summer squash, Tromboncino can be harvested young and tender like zucchini, or left to mature into a larger squash. The light green to tan fruit can grow up to 1 metre long and is best grown on a trellis to keep the fruit straight, although mature fruit left unsupported will often curl into its classic trombone shape. Delicious steamed, grilled, or sliced raw into salads, Tromboncino Squash is a wonderful alternative to ordinary zucchini and a rewarding variety to grow in the home garden.

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How to Grow Squash-Tromboncino

  1. Choose a warm, sunny position in a warm climate with plenty of sun. It grows best in temperatures around 18-24°C.
  2. Prepare rich, well-drained fertile soil with plenty of organic matter added. The ideal soil pH is around 6.0-7.0.
  3. Sow seeds at the right time directly into the garden once the soil has warmed.  Or start seeds indoors 3-4 weeks before the last frost, then plant out once the soil has warmed up.
  4. Plant seeds correctly about 2.5 cm deep and space plants 45-60 cm apart.  Leave 1.2-1.5 metres between rows to allow room for the vines to spread.
  5. Provide support for the vines as Tromboncino Squash is a vigorous climbing vine that can grow up to 3 metres long, so it is best grown on a strong trellis to save space and help keep the fruit straighter.
  6. Water regularly and deeply about once a week, especially during dry weather. Keep the soil evenly moist but not waterlogged.
  7. Feed during the growing season asTromboncino Squash is a heavy feeder, so apply a balanced fertiliser about once a month to support strong growth and fruit production.
  8. Watch for pests and disease. Keep plants well-spaced with good airflow to help prevent powdery mildew. Check regularly for squash bugs and vine borers, and control them early if they appear.
  9. Harvest while young and tender when the fruit is about 30-45 cm long, before the skin becomes tough. 
  10. Cut fruit from the vine carefully using a sharp knife or scissors to harvest, leaving a short stem attached. Store harvested fruit in a cool, dry place for several weeks.

Additional growing tips for Tromboncino Squash

  • Pick young fruit:   often if you want a zucchini-style crop. Regular picking encourages the plant to keep producing more young, tender fruit.
  • Leave some fruit to mature fully:  if you want a firmer squash that stores longer. Young fruit is used like zucchini, while mature fruit is used more like winter squash.
  • For the straightest fruit: train the vines early before they become too tangled. Tie the main runners gently to the trellis as they grow.
  • Do not worry if the mature fruit curls into odd shapes:  This is normal and is part of why it is called Tromboncino, because the mature fruit can resemble a trombone.
  • Plant it where bees and pollinators can easily find the flowers:  The large yellow flowers are attractive to pollinators, which helps with fruit set.
  • If flowers form but fruit drops off when tiny:  it may be poor pollination rather than a plant problem. Hand pollination can help by moving pollen from a male flower to a female flower.
  • Tromboncino is often considered:  more resistant to squash vine borer than many common zucchini types because it belongs to the Cucurbita moschata group, but it should still be checked for pest damage.
  • Keep the fruit off damp soil where possible:  Trellising helps reduce blemishes, rotting, and pest damage by improving airflow around the plant.
  • Prune only lightly if needed:  Remove badly diseased or overcrowded leaves, but avoid removing too many healthy leaves because they help shade and feed the developing fruit.
  • Harvest with a short stem attached:  This helps the fruit keep better and reduces damage at the cut end.
  • For a fun garden feature: grow Tromboncino over an archway or pergola. The hanging fruit can become quite ornamental as well as edible.

Heritage of Tromboncino Squash

Tromboncino Squash is an Italian heirloom variety with a long history in Mediterranean home gardens, where space-saving climbing vegetables were highly valued. Unlike many modern bush zucchini varieties, Tromboncino has retained its traditional vigorous vining habit, making it well suited to growing over frames, fences, and pergolas. Its continued popularity comes from its reliability, productivity, and the fact that it bridges the gap between summer squash and mature storage squash, giving gardeners several harvest options from the one plant.

Scoville Heat Units (SHU)

Plant Height

90 - 120 cm (3 - 4 feet)

Season of Interest

Summer to early Autumn

Temperature Range

18 - 30°C (64 - 86°F)

Determine / Indeterminate

Annual / Perennial / Biennial

Annual

Frost Hardy / Tender

Frost Tender

Full Sun / Part Sun / Shade

Full Sun

Sow Direct / Raise Seedlings

Sow Direct

Soil

Fertile, well-drained soil

pH

6.0 - 7.5

Soil Temperature

18 - 24 °C (65 - 75 °F)

Seed Preparation

None required

Sowing Depth

2.5 cm (1 inch)

Plant Spacing

90 cm (36 inches)

Row spacing

120 - 150 cm (48 - 60 inches)

Watering

Moderate

Germination Time (Days)

7 - 14 days

Harvest Time (Days)

70 - 80 days

Good Companion Plants

Corn, Beans, Marigolds

Bad Companion Plants

Potatoes

Pests

Squash vine borers, Aphids

Diseases

Powdery mildew, Bacterial wilt

More About Us

ABSeeds is an Australian owned business trading under the umbrella of Direct Compost Solutions which is owned and managed by Victoria Brun.

We as a company endeavor to provide to the public, Organic, Old Fashioned, Heritage, and Open-pollinated seeds that have not been genetically modified.

We purchased the business in November 2018 and renamed it to ABSeeds (All ‘Bout Seeds) to make the title shorter and represent what we hope to achieve with this business in the years ahead.

Seeds that we can’t grow ourselves we will acquire from people who grow for us, or we may purchase seeds from reputable heritage seed companies.

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    Please note:- At present no seeds can be sent to Tasmania.