Helianthus

(seed; cutflower)

Stage 1

Rooting hormones
No

Vermiculite cover
Yes

Soil temp (min)
68

Soil temp (max)
72

Irrigation frequency
Wet

Surfactant
No

Time (min)
3

Time (max)
5

Stage 2

Soil temp (min)
65

Soil temp (max)
68

Moisture
Medium

Fertilizer
none

Soil EC
<0.50

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

Time (min)
10

Time (max)
10

Stage 4

Soil temp (max)
62

Allow to wilt
No

Wash leaves
No

Fertilizer
100-150 1x/wk

Soil EC
<0.5

Time (min)
3

Time (max)
3

General

  • Make sure seeds are well covered and moist
  • Keep crop time short, as this crop grows very fast
  • Control growth with DIF, low starter charge, moisture, light, and fertilizer
  • Do not hold plugs!
  • 3-3 weeks total crop time

adapted from data published by Dr. Roger Styer