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Grow Long Island Brussels sprouts for firm green buds to roast, steam or add to your favourite savoury dishes. Give this compact, upright vegetable time to establish and cooler weather as the sprouts develop.
Ready to grow your own Brussels sprouts? Follow our step-by-step Brussels Sprouts Grow Guide for sowing, transplanting, regional timing and harvest checks.
Quick Grow Facts
Long Island at a glance
Crop: Brassica oleracea (Gemmifera Group) ‘Long Island’; a leafy, upright vegetable grown for the buds along its stem.
Seed: raw; 5 g and 100 g packs. Raw describes seed form, not treatment or food-grade status.
Sow and establish
Depth: 5 mm, covered with fine seedling mix. Keep evenly moist, never saturated.
Germination: allow 7–14 days at 15–20°C under suitable conditions. Give seedlings bright light after emergence.
Transplant: 4–6 true leaves and a well-rooted plug; harden off gradually first.
Space and support
Supplier spacing: 40 cm between plants × 65 cm between rows.
More garden room: about 60 cm between plants, retaining at least 65 cm between rows, gives a broader canopy room and airflow.
Size: supplier height about 80 cm; the RHS Long Island profile gives 0.5–1 m height and spread. Stake if wind rocks the stem.
Plan a cool finish
Position: full sun, fertile soil with drainage and steady moisture.
Season: a long growing period with cooler conditions as sprouts develop; district conditions matter more than a national calendar.
Harvest: supplier estimate 100–130 days, with the starting point unspecified. Pick firm, compact buds from the bottom upward; dates are not a guarantee.
Why Grow Long Island
This heirloom Brussels sprout forms edible buds along a sturdy leafy stem. Allow room for its canopy and use a stake if an exposed site causes rocking; compact growth is not a no-staking guarantee.
Growing Notes
Sow in modules or a prepared bed, then thin to one plant per position. Harden off before transplanting. The packet lists autumn and early spring, but choose a long enough local growing window for a cool finish. Keep soil evenly moist with good drainage and watch for caterpillars and aphids.
Harvest firm, tightly closed buds from the bottom upward. The supplier’s 100–130-day estimate does not specify sowing or transplanting as its starting point. Raw seed is not proof of untreated or food-grade status; do not eat sowing seed or use it for sprouts or microgreens. Follow the current packet’s handling warnings.
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