Handbook of Plant and Crop Physiology

GERMINATION AND EMERGENCE 107

Syringa amurensisS. persicaS. vulgaris

LilacOleaceae

Taxodium distichum

Bald cypressTaxodiaceae

Taxus baccataT. canadensisT. cuspidata

YewTaxaceae

Thuja occidentalisT. orientalis

ArborvitaeCuppressaceae

DSDSDS DT ESESES ES

Aug.–Oct.Aug.–Oct.Aug.–Oct.Oct.–Dec.Aug.–Oct.July–Sept.Oct.–Nov. Aug.–Sept.

2 years dry at

1–5

C

1 

years dry at 5 C

5–6 years dry at

5 

C

51 years at 1–5°C

and 6–8%moisturecontent

5–75–75–7

1–31–31–3 2–3 2–42–42–4^2

Seeds may germinate

without pretreatment.

Collect fruits as soon as

ripened to avoid birdremoval. Macerate toremove pulp and do notallow to dry.

Seeds sown after collecting

in July will germinatenaturally the secondspring. Seeds that areallowed to dry afterharvest will take longer togerminate or need longerpretreatment times thanfresh seed.

See note 5.Collect seeds immediately as

cones turn light brown andbefore seeds are naturallydispersed. Some seed lotsrequire no pretreatment.Seeds may require light togerminate.

continues