Planting timing
When to plant broccoli
Plant broccoli on the cited sheets — not on a national calendar month. Regional dates stay source-specific.
Growing guidance is general information. Timing, spacing, and care depend on cultivar, weather, soil, and local conditions. Check the sources and adjust the plan for your garden.
Dates and soil notes stay on the named cards below — not one planting window.
Sow on the cited sheet. Spacing lives on the broccoli hub.
Types and spacing live on growing broccoli.
What the sources say — at a glance
One source per card. Facts are not averaged.
Clemson HGIC 1301 (South Carolina)
Cool-season 65–75 °F. Fall in SC. Transplants 6–8 weeks spring / 5–6 fall. Piedmont Mar 20–Apr 30 / Aug 15–Sept 15; Coastal Mar 1–Apr 10 / Sept 1–Sept 30.
Details and limits (4)
Timing
Clemson HGIC 1301 (South Carolina): broccoli 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. Timing on their sheet — not a national plant date.
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.
Regions
Clemson HGIC 1301 (South Carolina): transplanting dates on their sheet — Piedmont March 20 to April 30 and August 15 to September 15; Coastal March 1 to April 10 and September 1 to September 30. South Carolina regions — not a national plant date.
Limit
South Carolina HGIC 1301. Piedmont and Coastal dates stay on this sheet. Not a ZIP calendar.
Maryland Extension (Maryland)
Hardy biennial, treated as an annual. Spring and summer plant. 5–7 week transplants, 4 weeks before last frost. DTM 55–65. Mid-July seed or first-week-August transplants.
Details and limits (3)
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.
Timing
Maryland Extension (Maryland): seeds can be sown directly in mid-July or transplants are set out by the first week in August. Maryland timing — not a national plant date.
Limit
Maryland broccoli garden page. Frost-relative transplant and mid-July seed stay Maryland. Not a ZIP calendar.
UMN Extension (Minnesota)
Spring: start indoors early to mid-April. Fall: early to late July. Minnesota timing — not a national plant date.
Details and limits (2)
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.
Limit
Minnesota broccoli sheet. April and July timing stay Minnesota. Not a ZIP calendar.
Illinois Extension (Illinois)
Early-spring transplants. Fall: start midsummer, transplant late summer. Illinois timing — not a national plant date.
Details and limits (2)
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.
Limit
Illinois broccoli page. Early-spring and late-summer timing stay Illinois. Not a ZIP calendar.
Sources differ
Make it yours
Save the bed in the Field Book so next season is not a guess.
Verified suppliers only
No supplier on this page
When a partner is listed, it will be outbound and disclosed. Nothing to buy here. Fertilizer, soils, and pesticides stay off this slot.
When do you plant broccoli?
Compare timing on the cited sheets. Clemson HGIC 1301 (South Carolina): Piedmont and Coastal dates on that sheet. Maryland: planted in spring and in summer; transplants four weeks prior to last frost. Minnesota: indoor early to mid-April, or July for fall. Illinois: early spring, or midsummer starts for late-summer transplant.
How many days to maturity?
Maryland Extension lists 55 to 65 days from transplanting. Source range — not how long yours takes.
What to record in the Field Book
Save the bed with the crop and the date. You may add a photo and notes. Compare entries you have recorded with each other — not with a diagnosis from this page. If you want an identification, bring the record to local Extension.
How we know — methodology. Ranges and assertions are cited per source, not blended.