Harvest · Signals, not a promise
When to harvest broccoli
When to harvest broccoli here is cited harvest signals. Head cues stay on their own sheets. Those notes are not how long yours keeps.
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.
Illustrative photograph — harvest signals stay on the cited sheets.
Growing lives on growing broccoli. Timing lives on when to plant broccoli. Care lives on broccoli plant care.
What the sources say — at a glance
One source per card. Facts are not averaged.
Clemson HGIC 1301 (South Carolina)
Main head 3–6 in; buds tightly closed. Cut stem ~6 in below the top. Secondary florets in the axils after the main head. Source note — not a yield outcome.
Details and limits (3)
Harvest
Clemson HGIC 1301 (South Carolina): harvest broccoli when the main head is 3 to 6 inches in diameter, and the flower buds are still tightly closed. Cut the main stem about 6 inches below the top of the head. Cue — not a keeping promise.
Method
Clemson HGIC 1301 (South Carolina): some varieties produce secondary florets in the axils of the stems after the main head has been harvested. Source note — not a yield outcome.
Limit
South Carolina HGIC 1301. Head size and bud-closed cue stay on this sheet. Not storage.
Maryland Extension (Maryland)
Cut the central head before flowers open, then side clusters as flowers develop. Harvest with 6–8 in of stalk.
Details and limits (2)
Harvest
Maryland Extension (Maryland): cut the central head (large terminal bud cluster) before flowers open, then cut small side bud clusters as flowers develop. Harvest with 6 to 8 inches of stalk. Cue — not a keeping promise.
Limit
Maryland broccoli garden page. Before-flowers-open cue and 6–8 in stalk stay Maryland. Not storage.
UMN Extension (Minnesota)
Usable size; still tight; before buds open. Short stalk; leave the lower portion. Side shoots form after the central head. Source note — not a yield outcome.
Details and limits (2)
Harvest
UMN Extension (Minnesota): harvest broccoli when heads reach a usable size, while they are still tight and before flower buds have opened. Cut the head off the plant, taking a short stalk. Leave the lower portion in the garden. Smaller heads—side shoots—form after removing the central head. Source note — not a yield outcome.
Limit
Minnesota broccoli sheet. Usable-size cue and short stalk stay Minnesota. Not storage.
Illinois Extension (Illinois)
Central head with 5–6 in of stem, fully developed, before it loosens and flowers show yellow. Side shoots after the central head. Source note — not a yield outcome.
Details and limits (2)
Harvest
Illinois Extension (Illinois): cut the central head with 5 to 6 inches of stem, after the head is fully developed, but before it begins to loosen and separate and the individual flowers start to open (show bright yellow). Side shoots develop after the central head is removed. Source note — not a yield outcome.
Limit
Illinois broccoli page. Fully-developed cue and 5–6 in stem stay Illinois. Not storage.
Sources differ
Make it yours
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When a partner is listed, it will be outbound and disclosed. Nothing to buy here. Fertilizer, soils, and pesticides stay off this slot.
How do you know when broccoli is ready to harvest?
Compare harvest signals on the cited sheets. Clemson HGIC 1301 (South Carolina): main head 3 to 6 inches, buds tightly closed. Maryland: cut the central head before flowers open. Minnesota: usable size, still tight, before buds open. Illinois: fully developed, before flowers show yellow.
Do the sheets agree on stalk length?
No. Clemson lists about 6 inches below the top of the head. Maryland lists 6 to 8 inches of stalk. Minnesota lists a short stalk. Illinois lists 5 to 6 inches of stem. Four cards — not averaged.
How we know — methodology. Ranges and assertions are cited per source, not blended.