Harvest · Signals, not a promise
When to harvest Brussels sprouts
When to harvest Brussels sprouts here is cited size and method cues. 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 Brussels sprouts.
What the sources say — at a glance
One source per card. Facts are not averaged.
Clemson HGIC (South Carolina)
Bottom sprouts 1–1½ in. Twist from the stalk. Cue — not a keeping promise.
Details and limits (2)
Harvest
Clemson HGIC (South Carolina): begin harvesting when the bottom sprouts are 1 to 1½ inches in diameter. A simple twist of a sprout should separate it easily from the stalk. Cue — not a keeping promise.
Limit
South Carolina HGIC blog. 1–1½ in twist cue stays on this sheet. Not storage.
Maryland Extension (Maryland)
About 1–1½ in. Twist or snap at the stalk. Cue — not a keeping promise.
Details and limits (2)
Harvest
Maryland Extension (Maryland): harvest when sprouts are about 1 to 1½ inches in diameter. Twist or snap them off at the stalk. Cue — not a keeping promise.
Limit
Maryland Brussels sprouts garden page. 1–1½ in twist-or-snap cue stays Maryland. Not storage.
UMN Extension (Minnesota)
Often smaller than 2 in. Cue — not a keeping promise.
Details and limits (2)
Harvest
UMN Extension (Minnesota): the sprouts can be as large as two inches in diameter, but gardeners often harvest them when they are smaller. Cue — not a keeping promise.
Limit
Minnesota Brussels sprouts page. Smaller-than-2-in cue stays Minnesota. Not storage.
Illinois Extension (Illinois)
About 1 in. Pick or cut. Cue — not a keeping promise.
Details and limits (2)
Harvest
Illinois Extension (Illinois): they may be picked or cut off the stem when they are firm and about one inch in size. Cue — not a keeping promise.
Limit
Illinois Brussels sprouts page. About-1-in pick-or-cut cue stays Illinois. Not storage.
Sources differ
Make it yours
Save the bed in the Field Book so next season is not a guess.
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How do you know when Brussels sprouts are ready to harvest?
Compare cues on the cited sheets. Clemson HGIC (South Carolina): 1 to 1½ inches, twist from the stalk. Maryland: about 1 to 1½ inches, twist or snap. Minnesota: often smaller than 2 inches. Illinois: about 1 inch, pick or cut.
Do the sheets agree on a size?
No. Clemson and Maryland name 1 to 1½ inches. Minnesota names often smaller than 2 inches. Illinois names about 1 inch. Four cards — not averaged.
How we know — methodology. Ranges and assertions are cited per source, not blended.