Cirsium

(seed; cutflower)

Stage 1

Rooting hormones
No

Vermiculite cover
Yes

Soil temp (min)
60

Soil temp (max)
65

Irrigation frequency
Medium

Surfactant
No

Time (min)
5

Time (max)
7

Stage 2

Soil temp (min)
60

Soil temp (max)
65

Moisture
Medium

Fertilizer
50-75 1x/wk

Soil EC
<0.75

Time (min)
7

Time (max)
7

Stage 3

Soil temp (min)
60

Soil temp (max)
65

Allow to wilt
No

Wash leaves
No

Fertilizer
100-150 1x/wk

Soil EC
<1.0

Time (min)
28

Time (max)
28

Stage 4

Soil temp (max)
60

Allow to wilt
No

Wash leaves
No

Fertilizer
100-150 1x/wk

Soil EC
<0.75

Time (min)
7

Time (max)
7

General

  • Best germination and growth at cool temperatures
  • Not responsive to vernalization or long days
  • 7-7 weeks total crop time

adapted from data published by Dr. Roger Styer