Handbook of Plant and Crop Physiology

78 CHONG ET AL.

TABLE 2

Continued

Medium temperature (

C)

Plant

Posttransplant

Days to

Light or

Species

type

Germination

(night)

germinate

dark

Pretreatment

Remarks

Stratify



4 to



4 

C

3 months

Stratify 5

C 21 days

Soak in water 24 hr Chill 4°C 2 wk

10–20 Variable10–1210–12

10

10–14 10–1410–14 12–1612–16 15–25

Geum

spp.

AvensRosaceae

Gillenia trifoliata

Bowman’s rootRosaceae

GlobulariaG. cordifolia

Globe daisyGlobulariaceae

Godetia

Farewell-to-springOnagraceae

Gomphrena globosa

Globe amaranthAmaranthaceae

Gypsophila repensG. elegans

Baby’s breathCaryophyllaceae

Helenium hoopesiiH. autumnale

SneezeweedAsteraceae

Helianathenum

spp.

Rock roseCistaceae

P P P P A A PA

P-WP-W

P

20–24 20–24

1313 21

21–24 21–2521–25

2121

20–24

10

10–12

1010 10 21 1313

13–1613–16 10–20

L D D LL LL

D or L

Reduce night temp. of

medium by 3

C for best

germination.

Stored seed (1 year)

germinates best.

Germination may be erratic or

slow. Predrench mediumwith fungicide to preventdamp-off. Keep seedlingsrelatively dry.

Reduce night temp. of

medium by 3°C for bestgermination.

Use fresh seed for best results.

Seed stored longer than 1year has much reducedviability.