Broccoli Waltham 29 – Heirloom, Cold-Hardy Variety for Continuous Harvests Broccoli Waltham 29 (Brassica oleracea var. italica) is a classic heirloom variety known for its cold tolerance, large blue-green heads, and abundant side shoots after the main harvest. Developed in Waltham, Massachusetts, this variety is perfect for gardeners who want a reliable, nutritious, and flavorful broccoli that thrives in cool weather. Why Choose Broccoli Waltham 29? ? Cold-Hardy Frost-Tolerant: Ideal for fall and early spring planting ? Large, Compact Heads: Produces 4-6 inch main heads followed by side shoots for extended harvests ? Rich in Nutrients: Packed with vitamins A, C, and K, plus fiber and antioxidants ? Great for Fresh Eating or Cooking: Perfect for steaming, roasting, or stir-frying ? Non-GMO Open-Pollinated: A sustainable choice for home gardens How to Grow Broccoli Waltham 29 from Seeds 1. Start Indoors (Recommended): Sow seeds 6-8 weeks before the last frost in seed trays. Plant seeds inch deep in well-draining, nutrient-rich soil. Keep soil moist with temperatures around 65-75F (18-24C). Germination occurs in 5-10 days. 2. Transplanting: Harden off seedlings before transplanting 12-18 inches apart in the garden. Choose a spot with full sun and well-draining, fertile soil. 3. Direct Sowing (Optional): In mild climates, seeds can be direct sown outdoors in early spring or late summer for a fall crop. Growing Tips for a Healthy Crop ? Water Consistently: Keep the soil evenly moist but avoid overwatering. ? Full Sun Exposure: Needs at least 6 hours of direct sunlight daily. ? Fertilize Every 3-4 Weeks: Use compost or a balanced organic fertilizer. ? Pest Control: Protect plants from cabbage worms with row covers or neem oil. Best Growing Conditions USDA Zones: 3-10 Planting Season: Early spring, late summer, or fall Soil pH: 6.0-7.0 Harvest: Cut the main head when it's 4-6 inches wide, and enjoy continuous side shoot production.