How to Grow Brussels Sprouts: Complete Cool-Season Guide

Brussels sprouts (Brassica oleracea var. gemmifera) are a rewarding cool-season crop that develops miniature cabbage-like heads along a tall central stalk. Frost-hardy and flavorful after cold exposure, they're a garden favorite for patient growers.

Planting

• Soil: Firm, nitrogen-rich, pH 6.0–6.5. Amend with organic matter for moisture retention.
• Timing: Sow seeds mid-spring to late summer for fall/winter harvest. Start in small pots.
• Transplanting: Move seedlings to garden at 6 inches tall (5–6 weeks old). Space 18–24 inches apart.
• Conditions: Full sun to partial shade. Protect from strong winds—plants become top-heavy.
• Temperature: Ideal growth at 60–75°F.

Harvesting

Pick sprouts when 1–1.5 inches in diameter, starting from the bottom of the stalk upward. Remove yellowing lower leaves. Twist or cut sprouts off. Don't let them enlarge excessively—they become bitter and may crack.

Fertilizing

• Pre-plant: Work 10-10-10 fertilizer into soil.
• During growth: Apply 1 tbsp 5-10-10 per plant (or a large handful of compost) every 3 weeks. Sprinkle around base, not on stem. Water in well.

Pest and Disease Management

As brassicas, they're vulnerable to cabbage worms, flea beetles, root maggots, and club root. Use row covers for insect protection. Practice crop rotation. Avoid damaging shallow roots during cultivation.

Keys to Success

• Consistent moisture—water frequently
• Regular nitrogen feeding throughout season
• Firm soil prevents lodging (toppling)
• Cool weather sweetens the harvest

With proper timing and care, Brussels sprouts deliver a unique, nutritious harvest when most other vegetables have finished for the year.