Growing broccoli

Types

Clemson HGIC 1301 (South Carolina): broccoli (Brassica oleracea, Italica Group) is a cool-season vegetable. The crop prefers average temperatures of 65 to 75 °F and is grown in South Carolina during the fall season. Type and temperature notes on their sheet — not a cultivar mill.

Timing

Clemson HGIC 1301 (South Carolina): transplants can be grown in approximately six to eight weeks for the spring, and in about five to six weeks in the fall. Direct seeding is possible, especially for the fall crop. Timing on their sheet — not a national plant date.

Spacing

Clemson HGIC 1301 (South Carolina): plant broccoli in rows 3 feet apart with plants spaced 1½ to 2 feet apart within each row. Spacing on their sheet — not a BioArva average.

Limit

South Carolina HGIC 1301. Fall timing and 3-foot rows stay on this sheet. Not fertilizer and not a cultivar mill.

Types

Maryland Extension (Maryland): four types — heading, Romanesco, sprouting, and raab. Broccoli raab is not a true broccoli but a type of turnip (Brassica rapa). Type notes on their sheet — not a cultivar mill.

Timing

Maryland Extension (Maryland): hardy. Biennial treated as an annual. Planted in spring and in summer. Five- to seven-week-old transplants are set out four weeks prior to the last frost date in spring. Days to maturity 55 to 65 from transplanting. Maryland’s attributed hardiness wording — not a planting-safety promise. Timing on their sheet — not a national plant date.

Spacing

Maryland Extension (Maryland): spacing 16 to 24 inches in-row by 24 to 30 inches between rows. Spacing on their sheet — not a BioArva average.

Limit

Maryland broccoli garden page. Frost-relative transplant and 16–24 in stay Maryland. Not fertilizer.

Types

UMN Extension (Minnesota): broccoli (Brassica oleracea var. italica). “Sprouting,” or “Calabrese” broccoli is a large-headed green vegetable. Type notes on their sheet — not a cultivar mill.

Timing

UMN Extension (Minnesota): for spring plantings, start seeds indoors in early to mid-April. For the fall crop, start seeds indoors or out, in early to late July. Minnesota timing — not a national plant date.

Spacing

UMN Extension (Minnesota): press the seeds one-fourth to one-half inch deep. Place the seedlings eight to 10 inches apart. Direct seed: dropping three seeds every eight to 10 inches; thin so that one seedling remains every eight to 10 inches. Spacing on their sheet — not a BioArva average.

Limit

Minnesota broccoli sheet. April/July timing and 8–10 in stay Minnesota. Not fertilizer.

Types

Illinois Extension (Illinois): broccoli is a hardy vegetable of the cabbage family. It develops best during cool seasons of the year. Type notes on their sheet — not a cultivar mill.

Timing

Illinois Extension (Illinois): transplant young, vigorously growing plants in early spring. For fall planting, start seedlings in midsummer for transplanting into the garden in late summer. Illinois timing — not a national plant date.

Spacing

Illinois Extension (Illinois): plant seeds 1/4 to 1/2 inch deep or set transplants slightly deeper than they were grown originally. Plant or thin seedlings 18 to 24 inches apart in the row and allow 36 inches between rows. Space plants one foot apart in all directions in beds. Spacing on their sheet — not a BioArva average.

Limit

Illinois broccoli page. Early-spring timing and 18–24 in stay Illinois. Not fertilizer.