Heirloom Pumpkin
Queensland Blue is an Australian heirloom winter squash that delivers both ornamental charm and exceptional flavor in a single plant. Its distinctive blue-green, heavily ribbed skin and pumpkin-like shape make it a standout in the fall garden, while the dense, sweet flesh inside earns its place at the dinner table in soups and pies. Plants produce fruits weighing up to 20 pounds and mature in 90 to 99 days, thriving across hardiness zones 3 through 13. This non-GMO heirloom has captured gardeners' hearts as much for its striking appearance as for its reliable, flavorful harvests.
Full Sun
Moderate
3-13
30in H x ?in W
Annual
High
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The blue-green rind, heavily ribbed and sculptural, turns Queensland Blue into a dual-purpose crop that decorates the fall landscape while producing genuinely sweet, dense fruit. Its heirloom pedigree and Australian origins give it genuine character, and at up to 20 pounds per squash, each plant yields substantial harvests. The 90 to 99 day maturity makes it reliable even in shorter growing seasons, though its cold hardiness across zones 3 through 13 means it adapts to widely different climates.
Queensland Blue shines in soups, where its dense, sweet flesh breaks down into silky purees, and in pies, where it provides structure and natural sweetness. Its substantial size and reliable yields make it valuable for preserving and long-term storage, extending its usefulness well beyond the harvest season. The striking appearance also makes it a natural choice for fall decorating and seasonal displays before it reaches the kitchen.
Start seeds indoors 3 to 4 weeks before your last frost date in soil kept between 70 and 85 degrees Fahrenheit. Sow seeds about 1 inch deep and keep soil consistently moist but not waterlogged until germination occurs. Transplant seedlings under grow lights once the first true leaves appear, maintaining warm conditions throughout.
Harden off seedlings over 7 to 10 days before transplanting outdoors, gradually exposing them to sunlight and outdoor temperatures. Transplant into the garden only after all danger of frost has passed and soil temperatures have warmed to at least 60 degrees Fahrenheit. Space plants 48 inches apart to accommodate their vigorous vining growth.
Direct sow seeds outdoors after the last frost date once soil has warmed to between 70 and 85 degrees Fahrenheit. Plant seeds about 1 inch deep and keep the area consistently moist until germination. Thin seedlings to final spacing of 48 inches apart.
Harvest Queensland Blue squash after 90 to 99 days when the skin has fully hardened and turned a deep blue-green; the rind should resist puncture from a fingernail. Cut the fruit from the vine with a sharp knife, leaving 2 to 3 inches of stem attached, which improves storage life. Wait until after the first light frost or when vines begin to die back naturally, as this concentrates sugars and improves flavor. Store in a cool, dry place for winter use.
Queensland Blue benefits from light pruning of the main vines once they exceed 8 feet in length; pinch back the growing tips to encourage branching and more even fruit production. Remove any damaged, diseased, or yellowing leaves throughout the season to improve air circulation and reduce disease pressure. If growing on a trellis, train the strongest vines upward and gently tie them as they grow, removing side shoots that crowd the main structure.
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“Queensland Blue traces its roots to Australia, where it developed as a regional heirloom variety prized for its productivity and storage qualities. This winter squash represents the kind of open-pollinated vegetable that shaped home and market gardens across the Southern Hemisphere, selected and saved by generations of growers who valued both its aesthetic appeal and culinary performance. Its journey to wider recognition came through seed savers and heirloom custodians who recognized its merit, ensuring that this Australian classic reached gardeners globally who now depend on it for reliable winter harvests and stunning fall displays.”