ONTARIO ROCK GARDEN SOCIETY

Germination guide P2

Genus

Species

Germination

Remarks

Penstemon

'Crystal'

.

Penstemon

'Giant Blue'

A

Penstemon

'Hyacinth'

J

Penstemon

'Purple Haze'

A

Penstemon

Edithiae'

A

Penstemon

Six Hills'

A

Penstemon

albertinus

F

Penstemon

albidus

F

poor germination

Penstemon

alpinus

C 4

.

Penstemon

angustifolius

A

Penstemon

arenicola

H

Penstemon

aridus

*

4 deg C x 8w, then 10 C x 4w then 16 C

Penstemon

barbatus 'Coccineus'

A

.

Penstemon

barbatus 'Elfin Pink'

A

Penstemon

barbatus 'Rondo'

A

Penstemon

barbatus v. praecox f. nanus

A

Penstemon

barrettiae

F

poor germination

Penstemon

caespitosus

F 3 5

.

Penstemon

cardwellii

F 3

Penstemon

clutei

G 3

Penstemon

cobaea

A

Penstemon

confertus

J

Penstemon

cyananthus

F

Penstemon

davidsonii

A

Penstemon

davidsonii ssp. davidsonii

A

Penstemon

davidsonii ssp. microphyllus

A

Penstemon

davidsonii ssp. praeteritus

A

Penstemon

davidsonii v. menziesii

A

Penstemon

deustus

L

Penstemon

digitalis

A 3

Penstemon

digitalis 'Husker Red'

A 3

Penstemon

eatonii

F

Penstemon

ellipticus

F

Penstemon

eriantherus

G

Penstemon

fruticosus hybrid

G

poor germination

Penstemon

fruticosus v. scouleri (syn. P.scouleri

G

ditto

Penstemon

fruticosus v. serratus

G

ditto

Penstemon

fruticosus v. serratus 'Holly'

G

ditto

Penstemon

glaber

A

.

Penstemon

gormanii

A

Penstemon

gracilis

L

Penstemon

gracilis nanum

L

Penstemon

grandiflorus

F

Penstemon

grandiflorus 'Albus'

F

Penstemon

hallii

A

Penstemon

hardy species

A

Penstemon

heterophyllus

A

Penstemon

hirsutus

G 3

Penstemon

hirsutus v. pygmaeus

A 3

Penstemon

lyallii

F

Penstemon

mensarum

L

Penstemon

multiflorus

L

Penstemon

newberryi

G

Penstemon

nitidus

F *

seed must be stored cold

Penstemon

ovatus

A

.

Penstemon

pallidus

G

Penstemon

parryi

.

Penstemon

peckii

L

Penstemon

pinifolius

A

Penstemon

procerus

G

Penstemon

procerus ssp. formosus

G

Penstemon

procerus ssp. tolmiei

G

Penstemon

procerus ssp. tolmiei

G

Penstemon

procerus v. micranthus

G

Penstemon

procerus v. procerus

G

Penstemon

pruinosus

F

Penstemon

richardsonii

F

Penstemon

rupicola

A

Penstemon

rupicola x cardwellii

A

Penstemon

rydbergii

F

Penstemon

secundiflorus

G 3 4

Penstemon

serrulatus

G

Penstemon

smallii

G 3

Penstemon

sp.

G 3

Penstemon

strictus

G

poor germination

Penstemon

thompsoniae v. desertipicti

J 3

.

Penstemon

tolmiei

A

Penstemon

tolmiei 'Pink'

A

Penstemon

unilateralis

F

Penstemon

venustus

G 3

Penstemon

virgatus ssp. asa-grayi

L 1

Penstemon

watsonii

G

Penstemon

whippleanus

A

Penstemon

x mesa

A

Perilla

frutescens

A 3

Perilla

frutescens 'Shiso'

A 3

Perilla

frutescens v. crispa (syn. v. nankinensis)

A 3

Periploca

sepium

.

Persicaria

virginiana

Petkovia

orphanidea

Petrocephalus

pinardii

Petrocoptis

all species

A

Petrocoptis

glaucifolia

A

Petrocoptis

lagascae (syn. P. glaucifolia)

A

Petrocoptis

pyrenaica

A

Petrophytum

caespitosum

A

Petrophytum

hendersonii

L

Petrorhagia

saxifraga

A 3

Peucedanum

littorale

.

Peucedanum

liturate

Peucedanum

verticillare

E

Phacelia

campanularia

A

Phacelia

campanulata

.

Phacelia

sericea

A

Phacelia

sp

.