Gemini Broccoli is a compact, fast-maturing cultivar that reaches harvest in just 50 days from transplant, making it one of the quickest broccoli varieties to table. Hardy from zones 3 through 11, this frost-tolerant Brassica thrives in cool-season gardens across most of North America. Its tight, dense heads deliver exceptional nutritional density, packing vitamins C and K along with highly bioavailable calcium that your body absorbs more efficiently than from dairy. The compact growth habit and tight spacing requirement (just 4 inches between plants) make it ideal for gardeners working with limited space.
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3-11
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Dense, tight heads that harvest before any yellow petals appear signal peak flavor and texture. The calcium in these florets absorbs into your body more readily than milk does, gram for gram, making Gemini a serious nutritional powerhouse on your plate. Quick maturity at 50 days means you can succession-plant for continuous harvests, and the compact form slots into tight garden rows just 18 inches apart.
Gemini Broccoli shines in any preparation where you want tender, nutrient-dense florets. Steam it until just-fork-tender and finish with butter and garlic, roast the heads until the edges crisp and caramelize, or add raw florets to salads and crudités. Because the heads are tight and dense when harvested at peak, they hold their texture beautifully through cooking and won't turn mushy or sulfurous.
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Start seeds indoors 5 to 7 weeks before your last spring frost, or 8 to 10 weeks before your first fall frost. Maintain soil temperature between 65 and 75 degrees Fahrenheit for reliable germination. Territorial Seed notes that days to maturity are calculated from transplant date, not seed sowing; add 25 to 35 days if you choose to direct seed instead.
Harden off seedlings gradually over 7 to 10 days before transplanting outdoors. Move transplants into the garden once soil has warmed to at least 50 degrees Fahrenheit and the danger of hard frost has passed (or plant in late summer for a fall crop). Space plants 4 inches apart in rows 18 inches apart. Gemini is frost-hardy and tolerates light frosts, so early spring transplanting is safe in zones 3 through 11.
Direct sow seeds outdoors in early spring (around April in most regions) or in mid to late summer for a fall crop. Plant seeds 1/2 inch deep and keep soil consistently moist until germination occurs. Thin seedlings to 4 inches apart once they develop their first true leaves.
Harvest heads when they are tight and dense, shortly before any yellow flower petals begin to show. Cut the main head with a clean, sharp knife, removing at least 6 inches of stem with a slanted cut to prevent water damage. Don't wait for heads to open or flower; once yellow petals appear, quality declines rapidly. After harvesting the main head, continue cutting side-shoots as they develop to extend your harvest from a single plant.
Once you harvest the main head, cut side-shoots regularly to encourage continued production. Remove the main head with a clean, sharp knife, cutting at least 6 inches of stem to prevent water from pooling on the cut surface and causing rot. A slanted cut sheds water naturally.
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