Clarkia

(seed; cutflower)

Stage 1

Rooting hormones
No

Vermiculite cover
Yes

Soil temp (min)
68

Soil temp (max)
72

Irrigation frequency
Medium

Surfactant
No

Time (min)
8

Time (max)
10

Stage 2

Soil temp (min)
65

Soil temp (max)
68

Moisture
Dry

Fertilizer
none

Soil EC
<0.50

Suppl. light
yes

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
<0.75

Suppl. light
yes

Stage 4

Soil temp (max)
62

Allow to wilt
No

Wash leaves
No

Fertilizer
100-150 1x/wk

Soil EC
<0.5

Time (min)
4

Time (max)
5

General

  • Control early stretch with DIF, cool temperature, low moisture and fertilizer, low starter charge, and high light
  • Do not hold plugs! Best growth if grown cool with low feeding and transplanted on time
  • 4-5 weeks total crop time

adapted from data published by Dr. Roger Styer