When Should You Harvest Broccoli?
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GardenSays
Broccoli plants are ready when central head fully developed but before any small yellow flower buds start to open (heads 3-8 inches across) — in Minneapolis, MN, typically Jun 1 – Jun 28.
- Ready when
- central head fully developed but before any small yellow flower buds start to open (heads 3-8 inches across)
- Days to maturity
- 55-75
- Est. first harvest
- Jun 1 – Jun 28
Ready when: central head fully developed but before any small yellow flower buds start to open (heads 3-8 inches across). Cut the central head with a knife; side-dress after cutting and side shoots will keep producing smaller heads.
- Once harvest season starts, check every couple of days once the head approaches full size — buds open fast in warm weather.
Do this this week
- 1.Watch for the sign: central head fully developed but before any small yellow flower buds start to open (heads 3-8 inches across)
- 2.Check every couple of days once the head approaches full size — buds open fast in warm weather
- 3.Then: refrigerate promptly
Typical estimate · 2 verified sources · Checked 2026-07-17 · How we decide
Why
On the calendar: planting on schedule in Minneapolis, MN puts first harvest around Jun 1 – Jun 28 (our estimate from the typical planting window plus 55-75 days to maturity). Weather, variety and care shift this by weeks — trust the sign above over the date.
Storage: refrigerate promptly.
- Days-to-maturity figures are averages from trial conditions — your season, variety and weather move them, which is why the visual readiness sign is the deciding test.
When this doesn't apply
- If you planted earlier or later than the typical window, shift the estimated dates by the same amount.
How this was calculated
- 1. Planting windowApr 7 – Apr 14Calculated result
Broccoli transplants on the same schedule the Planting calculator gives for Minneapolis, MN
- 2. Days to maturity55-75 daysSource guidance
55-75 days from transplant (University of Maryland Extension — Growing Broccoli in a Home Garden)
- 3. Estimated first-harvest windowJun 1 – Jun 28GardenSays estimate
Planting window + days to maturity — an estimate; the readiness sign always wins
Data sources
- University of Maryland Extension — Growing Broccoli in a Home Garden — Set out 5-7 week transplants 4 weeks before the last spring frost; spacing 16-24 in-row x 24-30 between rows; full sun (6+ hrs, prefers 8-10); 55-65 days from transplanting; cut the central head before flowers open (3-8 inches); keep the root zone moist, water more when heads develop. (checked 2026-07-17)
- Iowa State University Extension — Growing Broccoli in the Home Garden — Cole crops have shallow roots and require weekly irrigation if rainfall doesn't provide one inch of water per week; use soaker hoses or drip to keep foliage dry. Broccoli is typically ready 60-75 days after transplanting; harvest when the head is fully developed but before yellow flower buds open. (checked 2026-07-17)
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