Handbook of Plant and Crop Physiology

GERMINATION AND EMERGENCE 93

Aesculus glabra

Ohio buckeye

A. hippocastanum

Horse chestnutHippocastanaceae

Ailanthus altissima

Tree of heavenSimaroubaceae

Albizia julibrissin

SilktreeFabaceae

Alnus glutinosa

European alderBetulaceae

Amelanchier alnifolia

ServiceberyRoseceae

Aronia arbutifoliaA. melanocarpaA. prunifolia

Rosaceae

Asimina triloba

PawpawAnnonaceae

Berberis thunbergi

Japanese barberryBerberidaceae

DT DT DT DT DT DSDSDS DT DS

Sept.–Oct. Oct.–Apr.Fall Fall–winterJuly–Aug. Aug.–Nov.Aug.–Nov.Aug.–Nov.Aug.–Sept. May–Sept.

6–12 months at

5 

C

Store at 2–5

C in

sealedcontainers

18



months at

4–8

C

1–2 years at

1–5

C

2 years dry at

1–5

C

4–5 years at

1–5

C

10-day water

soak may aidgermination.

H

SO 2

4

30 min or

nick seed coatwith a file.

H

SO 2

4

15–30

min.

Fresh noneDried 3–6

4 2

6 (driedseed only)Fresh 3Dried 3–6

2–32–32–3^2 1–2

Stratify or fall-sow outdoors

immediately after harvestto prevent moisture lossfrom seed.

Fresh seeds may germinate

without pretreatment.

Scarification not necessary if

sown before seed coathardens.

Fresh seeds will germinate

without pretreatment.

Collect fruits immediately

upon ripening to avoidbird removal; macerate toextract the seeds.

Fall-sow fresh seeds

outdoors to germinate thefollowing spring.

See note 5.Macerate to extract seeds

before sowing.

Collect fruits when flesh is

soft. Entire fruit can besown or seeds can beextracted by maceration.

Collect fruits when red.

continues