The recommended pre-germinative treatments for this species are as follows:
Stratification for 2 to 3 months at 15/20ºC and 3-4 months at 4/5ºC. Days to germination from 2 to 3.
The most successful germination involves a combination of hot-cold stratification. The warm period consists of stratification at daytime temperature (20-30°C) for 1-3 months, followed by cold stratification at 5°C for 2-3 months (Young & Young, 1990).
Epigeal germination. Seedling with two elliptic cotyledons. The first two leaves are simple, rhomboidal lanceolate, with serrated edges, the following trifoliate leaves with serrated leaflets (Ruíz de la Torre et al., 1996).
Ash is a species that has traditionally been used in forestry plantations, particularly in riverbank restoration works, so its most frequent cultivation has been bare-root.
In this case, sowing can be done in autumn with freshly harvested seed or in spring with previously treated seed. Germination will take place 2-3 weeks after sowing, obtaining a plant type 1-1, with a final height between 40-100 cm.
However, plants are also grown in containers, although it is less advisable for this species, using 300-400 cm3 cells, for plant type 1-0, with a final size between 20-40 cm in height.
Source: Purity (%) : 90-95 .Germinating power (%) : 88 N1000 (no./kg.) : 14000.
Late Summer, Early Fall