Calabaza De Castilla is a traditional winter squash from the Cucurbita moschata family that brings old-world charm and substantial harvests to gardens across zones 3-13. This heirloom variety produces large fruits weighing 15-20 pounds with distinctive rustic light brown skin and deep ridges that deepen as the squash matures. The flesh inside is a rich, deep orange that signals excellent eating quality. In 100 to 110 days, you'll have a fully mature squash with hard skin ready for storage and cooking. It's a vigorous vining plant that thrives in full sun and rewards patient gardeners with the kind of substantial harvest that makes winter storage worthwhile.
48
Full Sun
Moderate
3-13
30in H x ?in W
—
High
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This is a true heirloom squash with the kind of rough, characterful appearance that tells you something real is happening inside. The combination of rustic brown exterior and deep orange flesh is both visually stunning and practically useful; the hard skin develops for excellent long-term storage. At 15-20 pounds per fruit, you're looking at the kind of yield that makes succession planting worthwhile. The deep ridges aren't just decorative; they're a sign the squash has reached full maturity and developed the dense, flavorful flesh that makes this variety worth the 100-plus day wait.
Calabaza De Castilla is a cooking squash through and through. The dense, deep orange flesh makes it exceptional for winter soups, particularly the creamy calabaza preparations found across Spanish and Latin American cuisines. Roast it in large wedges or cut it into chunks for stews where its substantial texture holds up beautifully through long, slow cooking. The flesh is also excellent for pies and other baked preparations where you need a squash with real substance and flavor. Because of its hard skin and excellent storage characteristics, this is the squash you want to preserve for eating throughout winter, not a variety for immediate harvest.
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Sow seeds directly into the garden after the last frost date when soil has warmed to at least 70°F. Calabaza thrives on direct sowing in warm soil, which gives the vines the full growing season they need.
Wait until the skin has hardened completely and turned a deep brown; you should not be able to pierce the skin with your thumbnail. The stem should have begun to dry and cork over at the point of attachment to the vine. Harvest before the first hard frost by cutting (not pulling) the squash from the vine with a few inches of stem attached. In 100-110 days from planting, when the deep ridges are fully pronounced and the rind has developed that characteristic rustic brown color, your calabaza is ready.
Allow vines to sprawl naturally across the garden; with vigorous, sprawling plants like this, pruning is typically unnecessary and can reduce productivity. If space is extremely limited, you can carefully remove some lateral shoots to redirect energy to the main vine and developing fruits, but this variety produces best when given room to vine freely.
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“The name itself tells the story: Calabaza is the Spanish word for pumpkin, and De Castilla indicates this variety's roots in Castile, the historic heart of Spain. This heirloom variety represents centuries of seed-saving tradition in Spanish and broader European agricultural culture, where winter squashes have been essential for food security and winter eating since their introduction from the Americas. Known also as a traditional variety of France, this cultivar traveled along European trade routes and became embedded in regional gardens where it was carefully preserved by farmers who valued its substantial size, storage longevity, and reliable production. Its presence in modern seed catalogs as a Non-GMO heirloom reflects the ongoing work of seed savers committed to maintaining genetic diversity and honoring the agricultural heritage this squash represents.”