300 seeds. 90 days. Brassica oleracea. Annual.
 
Broccoli 'Walthan 29' has 4 to 6-inch, green crowns with side shoots. It was developed for cool fall weather in Waltham, Massachusetts at the Agricultural Experiment Station. Introduced in 1951. Best grown for fall harvest.
 
Spacing 16 inches.
 
Sowing Broccoli Seeds: 
 
Sow broccoli seeds 6 weeks before the last frost date and transplant near the last frost date. Or sow outdoors 2 weeks before the last frost date. Sow 1/4 inch deep. Full sun.