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ONTARIO ROCK GARDEN SOCIETY |
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Germination guide R2 |
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|
Genus |
Species |
Germination |
Remarks |
|
Rhodothamnus |
chamaecistus |
. |
. |
|
Rhodotypos |
scandens |
* |
22-25 deg Cx 4w then 4 C |
|
Rhodotypos |
scandens 'Jet Bead' |
* |
ditto |
|
Rhus |
aromatica |
K * |
soak in 90 deg C water for 24h to leach out germination inhibitors |
|
Ribes |
cereum |
L 4 8 |
poor germination |
|
Ricinus |
communis 'Carmencita' |
A 6 7 |
. |
|
Robinia |
pseudoacacia 'Bessoniana' |
A 6 7 |
|
|
Robinia |
pseudoacacia 'Frisia' |
A 6 7 |
|
|
Rodgersia |
aesculifolia |
A * |
do not cover |
|
Rodgersia |
all species |
. |
grow best in bag for humidty |
|
Rodgersia |
pinnata |
A * |
do not cover |
|
Rodgersia |
sambucifolia |
A * |
do not cover |
|
Rodgersia |
sp. |
A |
. |
|
Rodgersia |
tabularis |
C * |
do not cover |
|
Romneya |
coulteri |
F 5 * |
store in moist sand in shade, check every spring, sow as soon as radicles appear |
|
Rosa |
all species |
6 7 8 * |
scarify, then plant at 32 deg C for 2-3w, then 4 C for 4m |
|
Rosa |
amblyotis |
D 8 * |
scarify with concentrated sulphuric acid CAUTION:THIS CAN BE A DANGEROUS PROCEDURE |
|
Rosa |
blanda |
D 8 * |
ditto |
|
Rosa |
camtschatica |
D 8 * |
ditto |
|
Rosa |
carolina |
D 8 * |
ditto |
|
Rosa |
dahurica |
D 8 * |
ditto |
|
Rosa |
ecae |
D 8 * |
ditto |
|
Rosa |
fedtschenkoana |
D 8 * |
ditto |
|
Rosa |
glauca |
D 8 * |
ditto |
|
Rosa |
luciae var. onoei |
D 8 * |
ditto |
|
Rosa |
maximowicziana |
D 8 * |
ditto |
|
Rosa |
mekeliana |
D 8 * |
ditto |
|
Rosa |
mollis |
D 8 * |
ditto |
|
Rosa |
rugosa |
D 8 * |
ditto |
|
Rosa |
sp. |
D 8 * |
ditto |
|
Rosa |
wichurana |
D 8 * |
ditto |
|
Rosa |
willdenowii |
D 8 * |
ditto |
|
Rosa |
woodsii |
D 8 * |
ditto |
|
Rosa |
x kamtchatica |
D 8 * |
ditto |
|
Rosa |
yakushim Baru |
D 8 * |
ditto |
|
Roscoea |
alpina |
A 2 |
. |
|
Roscoea |
cautleyoides |
A |
|
|
Roscoea |
purpurea |
A |
|
|
Rosularia |
libanotica |
A |
|
|
Rosularia |
muratdaghensis |
. |
|
|
Rosularia |
sempervivum |
A |
|
|
Rosularia |
sonoro |
. |
|
|
Rosularia |
sp. |
. |
|
|
Rubus |
allegheniensis |
C * |
scarify with concentrated sulphuric acid CAUTION:THIS CAN BE A DANGEROUS PROCEDURE |
|
Rudbeckia |
fulgida v. sullivantii 'Goldsturm' |
B |
. |
|
Rudbeckia |
hirta |
. |
|
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Rudbeckia |
hirta 'Gloriosa Daisy' |
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|
Rudbeckia |
laciniata |
A |
|
|
Rudbeckia |
maxima |
F |
|
|
Rudbeckia |
nitida |
A |
|
|
Rudbeckia |
nitida 'Herbstonne' |
A |
|
|
Rudbeckia |
triloba |
F |
|
|
Ruellia |
caroliniensis |
G |
|
|
Ruellia |
humilis |
G * |
4 deg C x 14w (very important for best germination), then 20 C |
|
Rumex |
atrosanguineus |
. |
. |
|
Rumex |
sanguineus |
A |
|
|
Rumex |
venosus |
L |
|
|
Rupicapnos |
africana |
C 4 |
|
|
Ruta |
graveolens |
A 2 |
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