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SUS Farms · Utah Seed Library

Growing Wallflower (Bowles Mauve) in Utah

flower · Brassicaceae · cool season · 100 days to harvest

Methodtransplant
Days to maturity100 days
Seed depth0.125″
Plant spacing12″
Row spacing18″
Germ. temp55–70°F

Schedule (May 15 last frost · Sevier County)

Start indoors3/6
Transplant out4/24
First harvest7/31

Planting depth, drawn to scale

0"1"2"3"4"5"6"0.125" deep

Step-by-step

  1. 1. Start indoors 10 weeks before last frost. Seed-starting mix in 2-4" cells. Bottom heat at 55–70°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 12″ apart in rows 18″ apart. Soil should be at least 55°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. Tender perennial — blooms spring to fall in mild winters. Sweet fragrance. Cottage-garden classic.