How to Grow Green Star
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Green Star
Brassica oleracea var. italica
vegetableGreen Star is a hybrid broccoli variety known for its large, dense, dark green head and extended harvest season. It produces a main central head followed by abundant side shoots, making it highly productive for both home and commercial growers. This variety is prized for its superior quality, tenderness, and excellent flavor.
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Example Green Star timeline · Pittsburgh, PA (Zone 6b)
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Plant Green Star
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Green Star
Around Jun 21≈ 65 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Green Star dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; performs best in cool-season climates
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Seedling
2-3 weeksSmall leaves emerging, developing true cotyledons and first true leaves. Plant is fragile and establishing root system.
Keep soil consistently moist. Maintain temperatures 65-70°F. Provide bright light to prevent leggy growth. Thin seedlings to prevent crowding.
Vegetative Growth
3-4 weeksPlant develops robust stems and numerous leaves. Leaf color deepens to dark green. Root system expands and strengthens.
Begin light fertilizing with balanced fertilizer every 2 weeks. Ensure adequate spacing to allow air circulation. Water consistently at soil level. Monitor for pest damage.
Head Formation
3-4 weeksCentral head develops from apical meristem, forming the characteristic dome of flower buds. Head becomes increasingly dense and compact.
Increase nitrogen fertilizer slightly to support head development. Maintain consistent watering—stress can cause premature bolting. Protect from extreme heat with shade cloth in hot climates.
Head Maturity & Harvest
1-2 weeksCentral head reaches full size (4-8 inches diameter), buds remain tight and firm, color is deep green. Ready for primary harvest.
Harvest the central head when buds are tight and compact. Cut with a sharp knife 6-8 inches below the head. Continue watering to encourage side shoot development.
Side Shoot Production
4-8 weeksAfter central head removal, multiple smaller side shoots develop from leaf axils. These shoots form secondary heads over 4-6 weeks.
Maintain consistent moisture and feeding. Side shoots are smaller (2-4 inches) but excellent quality. Harvest regularly to encourage continued production.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Row covers during planting season; Bt (Bacillus thuringiensis) spray; hand-picking; neem oil
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Bt spray; spinosad; row covers; parasitic wasps; hand removal
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Row covers; neem oil; spinosad; diatomaceous earth; reflective mulches
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Strong water spray; insecticidal soap; neem oil; ladybugs; lacewings
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Yellow sticky traps; insecticidal soap; neem oil; reflective mulch
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Crop rotation (3-5 years); lime to raise pH; resistant varieties; well-draining soil
Uses
Fresh Steaming & Cooking
CulinaryGreen Star broccoli is excellent steamed, roasted, or stir-fried. Its tender texture and sweet flavor make it ideal for fresh preparation, salads, and side dishes. [source]
Freezing & Preservation
CulinaryThe dense heads and side shoots freeze exceptionally well. Blanch florets briefly, cool in ice water, and freeze for year-round use in soups, casseroles, and cooked dishes. [source]
Anti-cancer Compounds
MedicinalBroccoli contains sulforaphane, a glucosinolate compound with potential cancer-fighting properties. Raw or lightly cooked broccoli retains more sulforaphane than heavily cooked varieties. [source]
Nutritional Supplement
HouseholdRich in vitamin C, vitamin K, folate, and fiber. Supports bone health, immune function, and digestive health. One cup of cooked broccoli provides over 50% of daily vitamin K needs. [source]
Pollinator Food Source
WildlifeIf left to flower, broccoli produces clusters of small yellow flowers that attract bees and other beneficial insects. Allows regeneration of seeds for future seasons. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest the main head when buds are tight, compact, and dark green—typically 65-90 days after transplanting. Cut with a sharp knife 6-8 inches below the head, leaving foliage intact. For maximum side shoot production, harvest the central head while buds are still tight. Side shoots will continue developing for 4-8 weeks after central head removal; harvest when 2-4 inches in diameter. Morning harvesting yields the most tender, juicy florets. Store unwashed heads in a plastic bag in the refrigerator for up to 14 days.
Fun Facts
- 🌱 Green Star was developed through hybrid breeding and is one of the longest-harvesting broccoli varieties, often producing side shoots for 2+ months after the central head is removed.
- 🌱 Broccoli is actually an immature flower head—if left unharvested, the tight buds will elongate and open into small yellow flowers in a spectacular display.
- 🌱 The name 'broccoli' comes from the Italian word 'brocco,' meaning branch or shoot, reflecting the plant's distinctive branching growth pattern.
Gardening Terms
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