Choose the Right Varietie Select the type of Brassica you want to grow, such as broccoli, cabbage, kale, or cauliflower, based on your growing zone and climate conditions.
Start Seeds Indoor Begin by sowing Brassica seeds indoors about 6-8 weeks before the last frost date. Use seed trays or pots with good-quality seed starting mix. Keep them in a warm, sunny location.
Provide Adequate Light Brassica seedlings need at least 12-16 hours of light per day, so consider using grow lights if you don’t have sufficient natural light.
Transplant When Ready Once the seedlings have grown strong and the outdoor temperatures are consistently above 50°F (10°C), harden them off by gradually exposing them to outdoor conditions for a week before transplanting.
Plant in Nutrient-Rich Soil Brassica vegetables thrive in loamy, well-draining soil rich in organic matter. Amend the soil with compost or well-rotted manure to ensure it’s fertile.
Space Plants Properly Give your plants enough room to grow—12-18 inches apart for kale and cabbage, and about 18-24 inches for broccoli and cauliflower. Crowding will stunt growth and reduce air circulation.
Water Consistently Brassica vegetables need consistent moisture, especially during dry spells. Water deeply but avoid wetting the leaves to prevent disease. Aim for about 1-1.5 inches of water per week.