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SUS Farms · Utah Seed Library

Growing Brussels Sprouts in Utah

vegetable · Brassicaceae · cool season · 100 days to harvest

Methodtransplant
Days to maturity100 days
Seed depth0.5″
Plant spacing24″
Row spacing30″
Germ. temp50–85°F

Schedule (May 15 last frost · Sevier County)

Start indoors1/23
Transplant out3/20
First harvest6/26

Planting depth, drawn to scale

0"1"2"3"4"5"6"0.5" deep

Step-by-step

  1. 1. Start indoors 16 weeks before last frost. Seed-starting mix in 2-4" cells. Bottom heat at 50–85°F until germination, then drop to room temperature. 14-16 hours of light from clip-lamp 2" from leaves.
  2. 2. Harden off for 7 days. Day 1: 1 hour outside in shade. Add an hour and more sun each day. Skip if windy or below 50°F.
  3. 3. Transplant 24″ apart in rows 30″ apart. Soil should be at least 50°F before planting. Black plastic mulch laid two weeks ahead helps in cool springs.
  4. 4. Mulch and water consistently. 2" of straw or wood chip around the base. Drip line at surface. 1" per week including rain.
  5. 5. Harvest around day 100. Long-season crop — start mid-March for fall harvest. Snap off lower leaves as sprouts swell.