1000 WALTHAM 29 BROCCOLI Brassica Oleracea Vegetable Seeds COLOR: Blue-green with yellow flowers HARVEST: 70 Days PLANT HEIGHT: 18 - 24" . . . PLANT SPACING: 18 - 24" LIGHT REQUIREMENTS: Sun . . . SOIL / WATER: Average Waltham 29 has a very long growing season and lots of side shoots, so get ready for a bunker crop!