Handbook of Plant and Crop Physiology

GERMINATION AND EMERGENCE 103

P. sylvestrisP. thunbergiiP. virginiana

PinePinaceae

Platanus occidentalisP. orientalis

Sycamore, PlanetreePlatanaceae

Populus deltoides

Poplar

P. tremuloides

AspenSalicaceae

Prunus armeniaca

Apricot

P. avium

Mazzard cherry

P. besseyi

Western sand cherry

P. cerasifera

Myrobolan plum

P. domesica

Plum

P. persica

Peach

P. pumila

Sand cherry

P. serotina

Black cherry

P. virginiana

Choke cherryRosaceae

ETETET DTDT DT DT DT DT DT DT DT DT DT DT DT

Sept.–Mar.Oct.–Dec.Sept.–Nov.Nov.–Feb.Nov.–Feb.May–JuneMay–June May–JuneJune–JulyJuly–Sept.July–Aug.July–Oct.July–Oct.July–Sept.Aug.–Sept.Aug.–Sept.

15115 

at 1–5°C and5–10%moisturecontent

1 

years at1–5°C and10–15%moisturecontent

2–3 years if air

dried 4 daysand storedsealed at 5

C

and 5–8%moisturecontent

Many conditions

tried. Air driedseveral years0–5°C insealedcontainers

1

1–31–20–1 NoneNone NoneNone 1–5 3–4^332343

Fresh seeds of somespecies requiringstratification may be sownwithout pretreatment withsome success.

Cold stratification for 2

months may improvegermination.

Clean seeds before sowing.

Fresh seeds germinaterapidly.

Extract seeds by maceration

and flotation. Fall sowingeliminates need forprechilling but seedsshould be sown earlyenough to satisfy thisrequirement beforegreezing occurs. Mulchingthe seed beds delaysfreezing.

See notes 4, 5, and 6.

continues