Populus deltoides

Seeds Type

Orthodox, that is to say seeds with the capability to withstand desiccation and freezing temperatures (-20°C) and may therefore be conserved for years, if not decades.

For germination, you must...

1. allow 24 HOURS for seed treatment;
2. subject them to a scarification before sowing (follow the steps below in order).

Scarification : Soak the winged seeds in water at room temperature for 24 hours.
Stratification : No stratification needed.
Seedlings : Sow the winged seeds by broadcasting them on the growth medium. Bury very lightly, less than one millimeter from the soil surface.
Comments : Cottonwood seeds are likely to need light in order to germinate. As a preventive measure, it is suggested to sow the seeds at the surface of the growth medium or very shallowly (about 1 mm under the surface).