How to Grow Early Sulphur
Early Sulphur
Brassica oleracea var. capitata
vegetableEarly Sulphur is a heritage cabbage variety known for its distinctive pale yellow-green color and compact, early-maturing heads. This cold-hardy brassica produces small to medium-sized heads with a tender, mild flavor and was historically valued for its sulfurous notes (hence the name). It's an excellent choice for spring and fall gardening in cooler climates.
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Example Early Sulphur timeline · Pittsburgh, PA (Zone 6b)
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Plant Early Sulphur
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 Early Sulphur
Around Jun 11≈ 55 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Early Sulphur dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 4-7; thrives in cool-season climates
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Seedling
2-3 weeksTiny cotyledons emerge, followed by first true leaves with serrated edges. Plants are delicate and pale green.
Keep soil consistently moist but not waterlogged. Provide bright light to prevent leggy growth. Thin seedlings to prevent crowding.
Vegetative Growth
3-4 weeksPlant develops 4-6 true leaves and establishes a strong root system. Foliage is increasingly blue-green to yellow-green.
Harden off transplants gradually before planting outdoors. Apply balanced fertilizer every 2 weeks. Monitor for pests.
Head Formation
2-3 weeksLeaves begin to curl inward, forming a compact, tight head. The characteristic pale yellow-green color deepens. Head gradually increases in size and density.
Maintain consistent watering and fertilization. Apply mulch to retain moisture and regulate soil temperature. Side-dress with compost mid-stage.
Head Maturity
1-2 weeksHead reaches full size, feels firm when gently squeezed, and displays a smooth, pale yellow-green exterior. Outer leaves may show slight blue-gray waxy coating.
Continue regular watering. Check harvest readiness by gentle pressure—ready when firm but not rock-hard. Reduce nitrogen to avoid splitting.
Harvest
Harvest window: 1-2 weeksHead is compact, firm, and ready for cutting at the base. Outer leaves protect inner leaves. Flavor is mild with subtle sulfurous undertones.
Harvest in early morning for best crispness. Cut with a sharp knife at the base. Use immediately or store in cool conditions.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Row covers before moths arrive; Bacillus thuringiensis (Bt); hand-picking; neem oil
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Bt spray; row covers; beneficial insects (parasitic wasps); hand-picking
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Row covers on young plants; diatomaceous earth; neem oil; insecticidal soap
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Strong water spray; insecticidal soap; neem oil; encourage beneficial insects
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Crop rotation (3-4 year gap); raise soil pH to 7.0+; remove infected plants; use resistant varieties
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Row covers; Bt; hand-picking eggs and larvae; pheromone traps
Uses
Fresh and Cooked Cuisine
CulinaryEarly Sulphur cabbage has a mild, tender flavor with subtle sulfurous notes. Excellent raw in slaws and salads, or lightly steamed, braised, or stir-fried to preserve delicate flavor. [source]
Fermentation & Preservation
CulinaryThe tender leaves and mild flavor make this variety suitable for sauerkraut, kimchi, and other fermented cabbage preparations. High moisture content ferments well. [source]
Nutritional & Phytonutrient Content
MedicinalLike all cabbage, Early Sulphur contains glucosinolates and sulforaphane compounds with potential anti-inflammatory and antioxidant properties. Rich in vitamin C, fiber, and minerals. [source]
Poultice & Folk Remedy
HouseholdHistorically, raw cabbage leaves were applied as poultices for swelling, soreness, and bruising. Some traditional medicine practices use cabbage for digestive support. [source]
Pollinator & Beneficial Insect Support
WildlifeIf left to bolt and flower, Early Sulphur produces attractive yellow flowers that attract bees and other pollinators, supporting garden biodiversity. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Early Sulphur typically matures 55-70 days after transplanting. Harvest when heads are firm to the touch and reach full size (4-6 inches diameter). Cut at the base with a sharp knife in early morning for maximum crispness. The variety is notably cold-tolerant and flavor improves after light frost. Harvest before temperatures drop below 32°F for extended periods. For storage, leave outer wrapper leaves intact and store in a cool (32-40°F), humid location for up to 2-3 months.
Fun Facts
- 🌱 The name 'Sulphur' comes from the distinctive chemical compounds (glucosinolates) present in the leaves, which create a subtle sulfurous or mustardy flavor when cooked.
- 🌱 Early Sulphur is a heritage variety that has been grown for centuries, particularly in cool-climate regions of Europe, and is prized by heirloom gardeners for its cold-hardiness and reliable early production.
- 🌱 The pale yellow-green color is genetically distinct from green cabbages and becomes more pronounced in cooler weather, making spring and fall the ideal seasons for growing this variety.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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