Gramma Trombone Pumpkin

Cucurbita moschata (cucurbit)

Also known as: Trombone Gramma, Gramma Pumpkin


A traditional long-necked pumpkin of the Cucurbita moschata family — the same botanical family as butternut. Known as "Gramma" in Australia (the local name for curved-neck moschata pumpkins), it has been a garden favourite here since the late 1800s, particularly in Cornish-Australian mining communities where it became the traditional pumpkin for pasties. Prized for its long curving trombone-shaped neck of dense, seed-free flesh, its exceptional storage life, and its sweet flavour in pies, roasts, mash, and traditional baking.

Days to harvest 90-100 days
Fruit size Up to 60cm long — long curving trombone-shaped neck with a small bulbous seed cavity at one end
Sowing depth 20mm
Germination 5-10 days at minimum 21°C soil temperature
Spacing 150cm apart (vines sprawl 3-4m)
Aspect Full sun, fertile moisture-retentive soil
Frost tolerance Frost tender — grown as an annual; sow only after all frost risk has passed

Growing notes

Choose a sunny, sheltered spot with room to sprawl — vines will run 3-4 metres and can be trained up a strong trellis if space is tight (the necks curve beautifully over supports and fruit will need a sling once it fills out). Position away from large trees that compete for water and nutrients. Watch for powdery mildew in humid weather — good airflow and morning-only watering help.

Soil preparation: A hungry feeder. Dig in generous compost and well-rotted manure before planting, and side-dress again when fruit starts to set. Aim for pH 6.0-6.8.

Support: Not needed for ground-grown vines beyond keeping developing fruit off wet soil (a tile or straw pad under each fruit prevents rot). For trellis growing, use a strong frame and sling each fruit in an old stocking or mesh bag once it's tennis-ball sized — the necks will hang down attractively.

Harvest & cure: Cut (don't tear) the stalk with 5cm of stem attached once the vine dries off and the stem turns woody and corky. Lifting by the stem handle breaks it and invites rot. Cure in a warm, dry, airy spot for 10-14 days, then store somewhere cool (10-15°C) and dry. Properly cured fruit keeps 6 months or more.

Key features

  • Long curving neck of solid seed-free flesh
  • Moist, deep orange, sweet flavour
  • Fruit up to 60cm long
  • Excellent for pies, mash, roasting, and pasties
  • Long-storing winter keeper — 6+ months cured
  • Open-pollinated heirloom, seed-saving friendly

Short season tips


Gramma Trombone needs 90-100 warm days, so in cooler NSW areas start seeds in pots 2-3 weeks before your last frost and transplant carefully (cucurbits hate root disturbance — use biodegradable pots you can plant whole). Warm the soil under black plastic for two weeks before planting out to bring soil temperature into the 21°C+ range. If cool weather threatens before fruit fully cures on the vine, cut with a long stem and finish curing indoors somewhere warm and dry.

  • Spring
  • Summer

Annual

  • Corn (classic "three sisters" trio) • Climbing beans (fix nitrogen, share the space vertically) • Nasturtium (trap crop for aphids and squash bugs) • Marigold (repels beetles and nematodes) • Borage (attracts pollinators, critical for fruit set) • Radish (trap crop for cucumber beetles) • Oregano (repels pests, ground cover)
  • (heavy feeders, compete for the same nutrients) • Brassicas (cabbage, broccoli — compete heavily and attract different pests) • Other Cucurbita moschata varieties if seed saving (cross-pollination — will cross with Waltham Butternut and Crookneck) • Fennel (inhibits most vegetable growth) • Don't repeat in the same bed each season — rotate to break the squash bug and vine borer cycle



A traditional long-necked pumpkin of the Cucurbita moschata family — the same botanical family as butternut. Known as "Gramma" in Australia (the local name for curved-neck moschata pumpkins), it has been a garden favourite here since the late 1800s, particularly in Cornish-Australian mining communities where it became the traditional pumpkin for pasties. Prized for its long curving trombone-shaped neck of dense, seed-free flesh, its exceptional storage life, and its sweet flavour in pies, roasts, mash, and traditional baking.