How to Grow Raab Broccoli
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Raab Broccoli
Brassica rapa subsp. rapa var. rapa
vegetableRaab broccoli, also known as broccoli rabe or rapini, is a leafy green cruciferous vegetable with small broccoli-like florets and edible leaves and stems. It has a slightly bitter, peppery flavor and is popular in Mediterranean and Asian cuisines. This fast-growing cool-season crop is nutrient-dense and can be harvested within 6-8 weeks.
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Example Raab Broccoli timeline · Pittsburgh, PA (Zone 6b)
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Plant Raab Broccoli
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 Raab Broccoli
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Raab Broccoli dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; prefers cool seasons (spring and fall)
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Get my Raab Broccoli timeline →Growth Stages
Seedling
1-2 weeksSmall leaves emerge with characteristic oval shape; true leaves develop within 1-2 weeks
Keep soil consistently moist. Thin seedlings to proper spacing. Provide bright light if growing indoors.
Vegetative Growth
2-3 weeksPlant develops multiple leaves and thickening stems; no visible florets yet
Water regularly. Apply nitrogen-rich fertilizer every 2-3 weeks. Monitor for pests. Pinch off flower buds if they appear too early.
Floret Development
2-3 weeksSmall broccoli-like florets begin to form at leaf axils and stem tips; plant takes on bushy appearance
Continue consistent watering and fertilizing. Increase watering frequency in warm weather. Plants bolt quickly in heat, so cool conditions are critical.
Harvest Ready
3-5 days before boltingCentral floret head is 2-3 inches long, firm, and dark green; side shoots are forming
Harvest the main head when buds are tight and before any yellow flowers appear. This triggers production of additional side shoots.
Side Shoot Production
2-4 weeksAfter central head harvest, multiple smaller side shoots emerge from leaf axils, extending harvest period
Continue harvesting side shoots every 2-3 days. Keep watering and fertilizing. Remove any bolted or yellowing portions.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Hand-pick larvae; use row covers; apply Bacillus thuringiensis (Bt); encourage parasitic wasps
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Use row covers on young plants; apply neem oil; dust with diatomaceous earth; maintain plant vigor
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Spray with strong water jet; apply insecticidal soap; introduce ladybugs; use neem oil
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Hand-pick caterpillars; apply Bt; use row covers; encourage beneficial insects
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Spray with neem oil or insecticidal soap; use yellow sticky traps; ensure good air circulation
Uses
Versatile Cooking Ingredient
CulinaryRaab broccoli can be sautéed, steamed, roasted, blanched, or stir-fried. Its slightly bitter, peppery flavor complements garlic, olive oil, and Asian seasonings. All parts—florets, stems, and leaves—are edible and tender when young. [source]
Nutritional and Anti-Cancer Properties
MedicinalRaab broccoli is exceptionally high in vitamins C and K, folate, and calcium. It contains sulforaphane and other glucosinolates shown in research to have potential anti-cancer and anti-inflammatory properties. [source]
Traditional Italian and Asian Dishes
CulinaryA staple in Italian cuisine (called broccoli di rapa), raab is commonly prepared with garlic, olive oil, and red pepper flakes. It's also prominent in Chinese stir-fries and Indian curries. [source]
Nutritious Fresh Greens
HouseholdRaab broccoli is an excellent addition to salads, smoothies, and grain bowls when young and tender. It stores well in the refrigerator for up to a week. [source]
Pollinator and Beneficial Insect Support
WildlifeWhen allowed to flower, raab broccoli blooms with small yellow flowers that attract bees, butterflies, and other pollinators, supporting garden biodiversity and ecosystem health. [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 central floret head when buds are tight and dark green, before any flowers open or turn yellow (typically 45-60 days from planting). Cut 1-2 inches below the head. Continue harvesting side shoots every 2-3 days for 2-4 weeks after the main head removal. Harvest in early morning for best flavor and texture. Tender young shoots and leaves are edible and delicious. Raab bolts quickly in heat above 75°F, so prioritize cool-season growing or provide afternoon shade in summer.
Fun Facts
- 🌱 Raab broccoli is not a true broccoli but rather a type of turnip (Brassica rapa) with enlarged flowering shoots, making it botanically distinct from heading broccoli (Brassica oleracea)
- 🌱 In Italy, raab broccoli (broccoli di rapa) has been cultivated for centuries and is a protected designation of origin (PDO) product in certain regions, reflecting its cultural and culinary importance
- 🌱 Raab broccoli is one of the fastest-maturing brassicas, ready to harvest in as little as 40-45 days, making it ideal for succession planting throughout cool seasons
Gardening Terms
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