Big Stem Broccoli is a Chinese broccoli variety (Brassica oleracea var. alboglabra) that delivers thick, succulent stems and deep green leaves in just 60-69 days. This cool-season annual thrives in hardiness zones 3-10 and reaches 12-18 inches tall, making it a compact but substantial addition to vegetable gardens. The variety's defining feature is its robust stalks with crisp texture and excellent flavor, qualities that have made Chinese broccoli a staple since ancient times when it was introduced to Asia and rapidly embraced into local cuisines. Closely related to European cabbage, this cultivar combines old-world heritage with modern hybrid vigor.
Full Sun
Moderate
3-10
18in H x ?in W
—
High
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The thick, juicy stems are the star here, delivering crispness that sets this apart from heading broccoli varieties. Deep green foliage and large leaves contribute to a handsome plant that's also remarkably forgiving about timing; you can sow Big Stem Broccoli multiple times throughout the growing season for successive harvests. It matures quickly enough to fit into tight garden schedules, yet performs reliably across a wide range of hardiness zones.
Big Stem Broccoli is harvested primarily for its stems and leaves, both of which are edible and delicious. The thick stalks are the prized portion, equally at home in quick stir-fries, steaming, blanching, or light sautéing with garlic. The large, tender leaves are also fully edible and delicious prepared similarly. Unlike heading broccoli, this variety doesn't form a tight crown; instead, the entire plant delivers harvestable nutrition.
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Start seeds indoors 4-6 weeks before your desired transplant date to establish sturdy seedlings before moving to the garden.
Transplant outdoors when seedlings have developed 2-3 true leaves and the soil has warmed slightly. Harden off gradually over 7-10 days to acclimate seedlings to outdoor conditions. Space transplants 10 inches apart in rows.
Direct sow seeds in the garden bed 4-6 weeks before your target harvest date, pressing seeds lightly into moist soil.
Harvest Big Stem Broccoli when the stems reach full thickness and the leaves are vibrant dark green, typically 60-69 days after planting. Cut the main stem just above the soil line when stalks feel firm and crisp. Side shoots will continue to develop after the main harvest, yielding additional smaller stalks over several weeks. Harvest in the morning for maximum crispness and moisture content.
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“Chinese broccoli was introduced to China in ancient times and swiftly became embedded in local culinary tradition. This particular open-pollinated variety carries forward that millennia-old heritage while adding hybrid vigor and consistency for modern gardeners. The cultivar name 'Big Stem' directly references the enlarged stalks that distinguish it from other brassicas, a trait that growers have selectively emphasized over generations.”