Triamble Pumpkin, or "Shamrock Squash", is is a rare and striking heirloom variety with a unique tri-lobed shape and captivating blue-green hue. This 6-8 tall by 8-12 inch-wide, 8-14-pound heirloom from Australia has an incredible shelf-life and can be stored for up to 2 years! Its near stringless, sweet orange-yellow flesh is perfect for cooking, making it a top choice for creamy soups, flavorful pies, and hearty roasted dishes. This three-lobed pumpkin is both beautiful and practical, boasting an unusual yet symmetrical form that adds a touch of elegance to any fall display or garden. Its stunning appearance makes it a conversation piece in any seasonal arrangement, while its superior flavor and texture offer endless culinary possibilities. Squash is one of the plants grown in the traditional Native American vegetable growing technique called the Three Sisters. The other two plants in the Three Sisters are beans and corn. Each plant had its role in this companion planting tradition. Corn served as a structure for the vining beans to grow up. Squash served as a ground cover to prevent weeds from growing. Beans provided natural fertilizer for all. Also Known As: Triamble Squash, Trimble Pumpkin, Triangle Pumpkin, Tri-Star Pumpkin, Aussie Squash, Lobed Pumpkin, Shamrock Pumpkin, Gray Pumpkin, Sweet Meat Winter Squash, Jarrahdale Pumpkin, Jarradale Pumpkin, Queensdale Pumpkin, Blue Cinderella Pumpkin, Blue Fairytale Pumpkin, Blue Doll, Blue Moon. Plant Name: Pumpkin, Triamble Latin Name: Curcubita maxima Days to Germinate: 7-14 Days to Harvest: 105 Plant Height: 18 - 36 Inches Spread: 8 - 12 Feet Growth Habit: Vining USDA Zones: 3-9 Lifespan: Annual Brand: TomorrowSeeds Sunlight: Full Sun, Partial Shade Pollination: Heirloom, Open-Pollinated GMO: No Fungicide-Treated Seeds*: No Seeds Packed For**: 2026 *Fungicide-treated seeds protect the seedlings from diseases until they are up and growing. Do not eat treated seeds. **Seeds are freshly packed for the growing season of the year listed. Seeds are still viable beyond pack date. Store in a cool and dry location such as the refrigerator or basement to best preserve germination rates. Planting Instructions: Soil Preparation: Choose an area with heavy, well-draining soil that receives at least 6 hours of sunlight each day. Remove weeds, large rocks, and litter from the planting area. Leave small weeds and dead grass, they will enrich the soil when turned under. Spade or till the soil 8-12 inches deep. Loosening the soil will help the plant establish strong roots. Plants grow best in soil with lots of organic matter. You may optionally add fertilizer or organic material such as compost, leaves, or rotted hay to mix into the soil at this point. For small gardens, scatter 2-3 tablespoons of fertilizer evenly and work into the top 2-3 inches of soil for each hill or 2 foot by 2 foot planting area. For larger gardens, scatter 2-3 pounds of a complete fertilizer for each 100 square feet of planting area. Work fertilizer or organic material into the soil and leave the surface smooth. Form rows of soil beds 4-6 inches high and at least 8 feet apart. This formation of ridges will help with drainage. Planting: Pumpkins grows best in warm weather. Starting Indoors: For an earlier harvest, you may optionally start planting indoors in containers 2-4 weeks before the last expected frost date in Spring, keeping seedlings at least 65F. Harden off then transplant seedlings outdoors in a sunny location when the soil temperature is reliably above 60F. To transplant seedlings, prepare a transplant hole outdoors in a sunny location. Remove the plants carefully from the pots or flats and set them in the holes, burying some of the stem in the ground. Pack the soil loosely around the plant and leave a slightly sunken area around each plant to hold water. Water the plants after transplanting. Optionally, train plants to climb a 6-8 foot trellis or fence as they establish, spacing plants 3 feet apart at the base, and prepare additional support for the heavy pumpkins as they grow. Directly Sowing: If directly sowing Pumpkins outdoors, plant in mid-late spring when the soil warms to at least 60F. Fall planting is not typically recommended unless planting in climates with mild winters (USDA Zones 9-11) - plant at least 3-4 months before the first expected frost date - or growing indoors at >70F using supplemental grow lights. To plant, make holes 1 inch deep and spaced 4 feet apart down the rows of raised beds. Plant 2-3 seeds per hole. If choosing to thin to the strongest plant, determine the strongest and healthiest plant, then remove all other plants, narrowing to a single plant per hole. Cover seeds thinly with soil and water after planting. Optionally, train plants to climb a 6-8 foot trellis or fence as they establish, spacing plants 3 feet apart at the base, and prepare additional support for the heavy pumpkins as they grow. Planting Depth: 1 inch Within-Row Spacing: 4 feet Between-Row Spacing:3 feet (trellis) or 8 feet (sprawl) Care During the Season: Watering: Water the plants deeply, soaking the soil to a depth of 6-8 inches, once to twice a week. If there is no rainfall, water 3-4 times a week. Sandy soils may need to be watered more often than heavy clay soils. Mulching around plants can help retain moisture. Weeding: Keeping plants weed-free improves production. If plowing or hoeing, do not dig deeper than 1 inch to prevent from cutting the feeder roots. Fertilizing: Once seedlings are established, 2-3 weeks after germination, you may optionally apply 2 tablespoons of a complete fertilizer around each hole, or 1-2 pounds per 100 square feet, without letting the fertilizer touch the plants. Optionally, continue fertilizing every 3-4 weeks as plants grow, especially after flowering begins. Water plants after fertilizing. Insecticides: Insecticides may be used to protect plants. Bt-based insecticides and sulfur are organic options that can be used for prevention. Sulfur also has fungicidal properties and helps in controlling many diseases. Before using a pesticide, read the label and follow cautions, warnings and directions. Diseases: If spots or mold appear, treat plants with an approved fungicide. Neem oil, sulfur, and other fungicides may be used. When using fungicides always follow label directions. Harvesting: Harvest Triamble pumpkins when they have fully matured, about 100 to 120 days after planting, in late summer to early fall. The skin should be a rich blue-green and the stem should be dry, hard, and brown. Gently press your fingernail into the skin; if it resists and doesn't leave an indentation, the pumpkin is ready for harvest. Cut the pumpkin from the vine, leaving about 2 to 4 inches of stem attached to help prevent rot. It's best to harvest on a dry day, ideally in the morning, to avoid excess moisture, which can promote fungal growth. After harvesting, let the pumpkins cure in a warm, dry area for 10-14 days to allow the skin to harden and improve storage life. Once cured, store your Triamble pumpkins in a cool, dry place for the best quality and longevity.
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