Catalpa speciosa

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 may...

1. proceed directly to sowing, without subjecting the seeds to any prior treatment.

Scarification : No scarification needed.
Stratification : No stratification needed.
Seedlings : Sow the winged seeds by broadcasting them on the growth medium. Bury lightly, less than five millimeters from the soil surface.