Handbook of Plant and Crop Physiology

76 CHONG ET AL.

TABLE 2

Continued

Medium temperature (

C)

Plant

Posttransplant

Days to

Light or

Species

type

Germination

(night)

germinate

dark

Pretreatment

Remarks

Sow, then stratify

20–30

C 6–8 wk

then 4–7

C 6–8

wk

None Stratify 20–24°C

2–4 wk, then3–5°C 4–6wk

50



10–15 10–12 8–20 Variable 15–20 20–25 4–8 5–10

Dryas octopetala

Mountain arensRosaceae

Dyssodia tenuiloba

Dahlberg daisyAsteraceae

Echinacea purpurea

Purple coneflowerAsteraceae

Echinops ritro

Glove thistleAsteraceae

Epimedium

spp.

BarrenwortBerberidaceae

Erigeron

spp.

FleabaneAsteraceae

Erinus alpinus

LiverbalsamScrophulariaceae

Eriophyllum lanatum

Woolly sunflowerAsteraceae

Eryngium

Sea hollyApiaceae

P A

P-W

P P P P P P

15–20 18–21 21–24 20–24 5–10

13

18–24 20–24 18–23

15–18 13–16

(^10) 7–15 10
10–12 10–15
15
D or L
L L D
D or L
L
Reduce night temp. of
germinating medium by 3 
C for best germination.
Seeds may not come true totype and may take 2 yearsto flower.
When sown outdoors in late
summer, seeds are naturallystratified and germinate inearly spring.
Use fresh seed. After 2 wk,
dormancy sets in andgermination time may beextended over 1–2 years.