When Should I Harvest Brussels Sprouts?

Knowing when to harvest Brussels sprouts is the difference between tight, sweet buttons with excellent flavour and loose, open, or over-mature sprouts that have passed their best. The harvest season for Brussels sprouts can stretch from October through to March depending on variety, making them one of the most extended-harvest vegetables in the kitchen garden. Starting to pick at the right moment — and picking progressively from the bottom of the stem upward — is the key to a productive and enjoyable crop.

Judging readiness

A ready sprout should be firm, tightly closed, and about 2–4 cm in diameter — roughly the size of a walnut. Squeeze the sprout gently: it should feel solid and compact, not soft or spongy. The outer leaves of the sprout should be dark green and pressed tightly together. Sprouts that have opened out and the leaves are separating are over-mature and will have a stronger, more bitter flavour — harvest these promptly and use them quickly or remove them from the plant to direct energy into those that remain.

Harvesting from the bottom up

Sprouts develop from the bottom of the stem upward. Always start picking from the lowest sprouts first, working progressively up the stem over several weeks. This allows the upper sprouts more time to develop and swell, extending the harvest period. To remove a sprout, snap it downward sharply — it should break cleanly away from the stem. If it does not break cleanly, use a sharp knife or scissors. Remove any yellowing leaves below the picking point at the same time to keep the stem clean and reduce disease risk.

Timing by variety

Early varieties (F1 Peer Gynt, Trafalgar) are ready from September to November. Mid-season varieties (Maximus, Igor) harvest from November to January. Late varieties (Rubine, Bosworth) carry into February and March. Planting a mix of early, mid, and late varieties extends the season from late September through to spring. Check the seed packet or plant label for the expected harvest window for the specific variety you are growing.

Stripping the plant at the end of season

Once the sprouts at the top of the stem have been picked or have passed their best, remove the plant completely. Before clearing the stem, harvest the leafy crown at the top — these leafy sprout tops are edible and cook similarly to spring greens, with a pleasant nutty flavour. Clear all stems, leaves, and roots from the ground and add to the compost heap, or if there was any disease, dispose of in the green waste bin rather than composting.