How to Grow Raab
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Raab
Brassica rapa subsp. sylvestris
vegetableRaab, also known as broccoli rabe or rapini, is a leafy green cruciferous vegetable with small broccoli-like florets and tender leaves. It has a slightly bitter, peppery flavor and is popular in Italian and Asian cuisines. The entire plant—leaves, stems, and florets—is edible.
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Example Raab timeline · Pittsburgh, PA (Zone 6b)
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Plant Raab
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
Around May 27≈ 40 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Raab dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; prefers cooler seasons (spring and fall)
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Get my Raab timeline →Growth Stages
Seedling
2-3 weeksTiny cotyledons emerge within 5-10 days. True leaves appear oval and slightly serrated.
Keep soil moist but not waterlogged. Provide bright light and moderate temperatures (60-70°F). Thin seedlings to proper spacing once they have 2-3 true leaves.
Vegetative
3-4 weeksPlant develops multiple lobed leaves and a stronger root system. Stems thicken and leaf color deepens to blue-green.
Water consistently and fertilize every 2-3 weeks with balanced or nitrogen-rich fertilizer. Monitor for pests. Ensure adequate spacing for air circulation.
Flowering Bud Formation
1-2 weeksSmall broccoli-like florets form at the terminal end and along leaf axils. Buds are tight and green, surrounded by tender leaves.
Continue consistent watering and fertilizing. This is the ideal harvest stage; harvest before buds open into flowers. Cool temperatures promote tighter buds.
Side Shoot Development
2-3 weeksAfter harvesting the main head, secondary shoots sprout from leaf axils along the stem, each with smaller florets.
Continue watering and fertilizing. Harvest side shoots regularly to encourage more production. Remove any yellowing or damaged leaves.
Bolting/End of Season
1-2 weeks before complete senescenceIf unharvested, flowers open into small yellow blooms. Plant becomes stringy and bitter as energy shifts to seed production.
Once flowering begins extensively, the plant is past peak eating quality. Allow some plants to bolt for seed if desired, or remove to make room for new plantings.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use row covers on young plants; spray neem oil or insecticidal soap; dust with diatomaceous earth; maintain good sanitation.
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Hand-pick larvae; use Bt (Bacillus thuringiensis); apply spinosad; use row covers to prevent moth laying eggs.
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Spray strong water stream to dislodge; use insecticidal soap or neem oil; encourage beneficial insects like ladybugs.
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Rotate crops; avoid planting brassicas in same location for 4+ years; maintain soil pH above 7.2; use resistant varieties if available.
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Use disease-free seeds; practice crop rotation; remove infected plant material; avoid overhead watering; improve air circulation.
Uses
Sautéed or braised greens
CulinaryRaab is a staple in Italian and Asian cuisine, commonly sautéed with garlic, olive oil, and red pepper flakes. The tender leaves, stems, and florets all cook quickly and pair well with pasta, grains, or seafood. [source]
Raw in salads and slaws
CulinaryYoung, tender raab leaves and small florets can be eaten raw in salads when harvested early, offering a peppery, slightly bitter bite similar to arugula. [source]
Antioxidant and anti-inflammatory benefits
MedicinalRaab is rich in glucosinolates and other compounds that may support detoxification, reduce inflammation, and provide cancer-preventive properties common to all cruciferous vegetables. [source]
Vitamin and mineral content
MedicinalHigh in vitamins A, C, and K, as well as calcium and iron, making it a nutritious addition to any diet supporting bone health and immune function. [source]
Extended harvest season crop
HouseholdRaab's short growing season and ability to thrive in cool spring and fall weather makes it ideal for succession planting, extending the harvest season and providing continuous fresh greens. [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 when the main flowering head is tight and green, before buds open into flowers—typically 40-60 days from planting. Cut the main head 2-3 inches below the florets with a sharp knife. Leave the lower stem and leaves intact to encourage side shoot production. Side shoots can be harvested 1-2 weeks later. Raab is best harvested in cool weather; heat causes bitterness and rapid bolting. Morning harvest after dew dries yields the crispest product.
Fun Facts
- 🌱 Raab is sometimes called 'the poor man's broccoli' because it grows faster, costs less to produce, and yields more edible plant material per plant than heading broccoli.
- 🌱 The name 'rapini' comes from the Italian word 'rapa' (turnip), as raab is actually a leafy turnip relative, not a true broccoli.
- 🌱 In Italy, raab (cime di rapa) has been cultivated for centuries and is a signature ingredient in dishes like 'orecchiette con cime di rapa,' a beloved traditional pasta dish.
Gardening Terms
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