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Squash Seeds - Winter - Triamble

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Selected variant: 4 g Packet. Price: $3.59.
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Mountain Valley Seed Company
High-quality heirloom & open-pollinated seeds since 1974  
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105 days to maturity. Cucurbita maxima. Triamble Winter Squash Seeds. Non-GMO, annual, heirloom, open-pollinated. Suitable for growing in fields, garden plots, and raised beds. An unusually beautiful Australian heirloom with a blue-gray, three-lobed “shamrock” shape and dense, sweet orange flesh. Vigorous vines and hard rinds make Triamble great for display, cooking, and long storage—often many months. This is a standout for flavor and keeping quality. ~175 seeds/oz.

SKU: 55179

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Growing Triamble Winter Squash in the Vegetable Garden

Sow seeds 1 inch deep in warm soil after all frost danger. Direct sow in hills or rows, or start indoors 3-4 weeks early in biodegradable pots to avoid root disturbance. Space plants 36-48 inches apart with 60-72 inches between rows to allow vines to run.

Keep soil evenly moist and mulch to retain moisture and reduce weeds. Feed with a balanced fertilizer or compost at planting and when vines begin to run. Encourage pollinators; avoid overhead watering to minimize mildew. Good companions include corn and beans; avoid planting near potatoes.

Harvesting of Triamble Winter Squash

Harvest when rinds are hard, the skin color is set, and the stem turns dry and corky—before hard frost. Cut fruit with 2-3 inches of stem. Cure in a warm, dry, well-ventilated spot for about 10-14 days at roughly 80 to 85 F, then store cool and dry. Properly cured Triamble stores for many months.

About Triamble Winter Squash Garden Seeds

Also known as Shamrock squash, this Australian heirloom was introduced in the early 1930s and is prized for its distinctive three-lobed form and exceptional keeping quality. Fruits often reach around 10 pounds with fine-grained, sweet orange flesh that’s excellent for roasting, soups, and baking.

Bred and selected for firmness and storage; the unusually hard rind helps it ship and store well.

Each lobe contains a small seed cavity, leaving more usable flesh compared to many squashes.

Stories/Tips From Our Gardeners

"Let Triamble cure well—its flavor deepens in storage. I roast the wedges skin-on, then scoop the sweet flesh for pies and soups."

- Jerry Sawyer, True Leaf Market Writer

Triamble Winter Squash Seeds Per Package:

  • 4 g Packet - Approximately 25 Seeds
  • 1 oz - Wholesale - Approximately 175 Seeds
  • 4 oz - Bulk Seeds - Approximately 700 Seeds
  • 1 lb - Bulk Seeds - Approximately 2,800 Seeds
  • 5 lb - Bulk Seeds - Approximately 14,000 Seeds
  • 25 lb - Bulk Seeds - Approximately 70,000 Seeds

Non-GMO Triamble Winter Squash seeds are available for Fast Free Shipping (opens in a new tab) on qualifying orders.

Basic Info

Basic product information
PropertyDetails
Latin Name: Cucurbita maxima
Triamble Winter Squash Color: Blue-gray rind; deep orange flesh
Triamble Winter Squash Flavor: Sweet, dense, and slightly nutty

Growing Info

Growing information
PropertyDetails
Hardiness Zone: Annual 3, 4, 5, 6, 7, 8, 9, 10, 11
Days to Maturity: 105
Days to Germination: 7-14
Seeding Depth: 1 inch
Plant Spacing: 36-48 inches
Row Spacing: 60-72 inches
Plant Height: 12-24 inches
Growth Habit: Vining
Soil Preference: Rich, well-drained soil with consistent moisture; amend with compost. pH near 6.0-6.8.
Temperature Preference: Warmer 70-95 F
Germination Temperature: 70-95 F
Light Preference: Full Sun

Other Info

Other product information
PropertyDetails
Direct Sow: Yes
Start Indoors: Yes, 3-4 weeks before transplanting.
Plant Width: 72-120 inches
Deer Resistant: No
Pests and Diseases: No notable resistances; watch for squash bugs, squash vine borer, and powdery mildew.
Garden Size: Fields, Garden Plot, Raised Bed
Climate Tolerance: Heat, Drought

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