Handbook of Plant and Crop Physiology

GERMINATION AND EMERGENCE 95

Castanea dentataC. mollisima

ChestnutFagaceae

Catalpa

spp.

CatalpaBignoniaeceae

Cedrus atlanticaC. deodara

CedarPinaceae

Celtis occidentalis

HackberryUlmaceae

Cercis canadensis

Eastern redbudFabaceae

Chaenomeles japonica

Flowering quinceRosaceae

Chamaecyparis nootkatensisC. lawsonianaC. obtusa

CypressCupressaceae

DTDT DT ETET DT DT DS ETETET

Aug.–Oct.Aug.–Oct.Oct.–Mar.Fall–winterFall–winter Oct.–winterJuly–Aug.Oct. Sept.–winterSept.–winterSept.–winter

1 year at 1–3°C

and 40–45%moisturecontent

2 

years dry at

5°C

3–6 years at

0–5°C and10% moisturecontent

5–6 years at

0–5

C

2–5 years at 0

C

and 10%moisturecontent

H

SO 2

for 30 min 4

before coldtreatment

1

NoneNone

1–31–3^11 2–3 2–3 2–3^111

Collect nuts as soon as burrs

open; viability is lost ifallowed to dry. Cure nuts1–7 days at 15–22°C outof sunlight.

No pretreatment necessary.Collet seeds when comes

break open. Pretreatmentnot usually necessary butgermination may beerratic and slow. Springsowing recommended.Store immediately uponcollection; seeds are oilyand may deterioratequickly upon drying.

Fall planting without

scarification will result ingood germination if seedsare fresh and not dried.

Seedlings are extremely

variable; vegetativepropagation isrecommended for uniformplants.

See notes 4 and 5.

continues