Platycodon

(seed; cutflower)

Stage 1

Rooting hormones
No

Vermiculite cover
No

Germ. light
Yes

Soil temp (min)
68

Soil temp (max)
72

Irrigation frequency
Medium

Surfactant
No

Time (min)
7

Time (max)
10

Stage 2

Soil temp (min)
65

Soil temp (max)
68

Moisture
Medium

Fertilizer
50-75 1x/wk

Soil EC
<0.75

Time (min)
7

Time (max)
7

Stage 3

Soil temp (min)
62

Soil temp (max)
65

Allow to wilt
No

Wash leaves
No

Fertilizer
100-150 1x/wk

Soil EC
<1.0

Time (min)
35

Time (max)
35

Stage 4

Soil temp (max)
62

Allow to wilt
No

Wash leaves
No

Fertilizer
100-150 1x/wk

Soil EC
<0.75

Time (min)
9

Time (max)
10

General

  • Germination tends to be slow and erratic
  • Avoid low temperature as growth slows too much
  • Control growth with DIF, fertilizer, moisture, and light
  • 9-10 weeks total crop time

adapted from data published by Dr. Roger Styer