How long until brussels sprouts is ready to harvest?

80-100 days. Sprouts are 1-2 inches diameter, firm and compact; harvest from bottom up as they mature

When to Plant Brussels Sprouts

Brassica oleracea var. gemmifera

vegetableZones 3–10intermediate

Cool-season crop producing marble-sized cabbage-like sprouts along a thick stalk. Flavor dramatically improves after frost. A patient gardener rewarded with sweet sprouts.

Planting calendar

Start seeds indoors

4 weeks before your last spring frost.

Fall planting

14 weeks before your first fall frost.

Best planted for fall harvest; frost improves flavor by converting starches to sugars

Spacing & harvest

Plant spacing: 18-24 inches
Row spacing: 30-36 inches
Days to harvest: 80-100 days
Ready when: Sprouts are 1-2 inches diameter, firm and compact; harvest from bottom up as they mature

Companion planting

Plant near

Dill — Attracts beneficial wasps that prey on cabbage worms
Onion — Deters common brassica pests

Keep away from

Strawberry — Inhibits brassica growth

Get brussels sprouts planting dates for your exact zone

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Sources: Purdue University Turfgrass Science: Use Growing Degree Days to Better Time Your Applications · University of Missouri Extension: Cool-Season Grasses: Lawn Maintenance Calendar · University of Minnesota Extension: Pre-emergent Herbicides for Crabgrass Control in Lawns