Planting Brussels Sprouts
Brussels Sprouts is a cool season vegetable in the Brassicaceae family. Getting the timing right is the difference between a strong stand and a disappointing one, so the windows below are given relative to your own last spring frost and first fall frost rather than a generic calendar date. Look up your local frost dates and count back or forward from there.
Brussels Sprouts is started indoors 4–6 weeks before your last spring frost date, giving seedlings a head start before they move outside.
Transplant young plants outdoors 0–2 weeks before your last frost — Brussels Sprouts tolerates cool conditions and benefits from an early start.
For a fall crop, sow 14–16 weeks before your first fall frost so plants mature as the weather cools.
Brussels Sprouts can be grown by starting indoors and transplanting. Starting indoors gives the longest, most controlled season, while direct sowing is simplest where the season is long enough.
Spacing and Planting Depth
Give Brussels Sprouts room to mature. The figures below come from verified extension and seed-supplier data for typical varieties.
| Spacing in row | 18 inches |
|---|---|
| Row spacing | 30 inches |
| Plants per sq ft | 0.27 |
| Planting depth | 0.25 inches |
| Sun requirement | Full sun |
Days to Maturity
Brussels Sprouts reaches maturity in 90–110 days from transplant.
Brussels Sprouts is ready to harvest after about 100 days. Harvest before summer heat or, for fall crops, before a hard freeze, to keep quality high.
Conditions and Care
As a cool-season vegetable, Brussels Sprouts does its best growing in the cooler weather of spring and fall and tends to bolt or turn bitter in summer heat. It is frost hardy and can shrug off light freezes, so it can stay in the ground later into the season than tender crops.
Brussels Sprouts needs full sun — give it at least six hours of direct light a day for the best growth and flavor. Sow seed about 0.25 inches deep — small seed is sown shallow and barely covered, then keep the soil evenly moist until seedlings establish.
Brussels Sprouts belongs to the Brassicaceae family; rotating where you grow members of this family each year helps limit the build-up of soil-borne pests and disease. Brussels Sprouts is generally grown as a single planting each season rather than succession sown.
Companion Plants
Pairing Brussels Sprouts with the right neighbors can improve growth and deter pests; a few combinations are best avoided.
Grows well with: Beets, Celery, Onion
Keep away from: Tomato, Strawberry
Growing Notes
Flavor improves after light frost.