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Cornus canadensis/sulfuric acid

Dear List;

We have some Cornus canadensis seeds that we would like to germinate.

According to the Dirr/Heuser book; 'The Reference Manual of Woody Plant
Propagation', a sulfuric acid soak for one hour is recommended, however,
there is no indication of a specific concentration for the acid.

Are different concentrations used for different seeds (like GA-3)?  Can we
use the sulfuric acid we see at Home Depot (it's for clearing sinks)?  Any
help would be greatly appreciated.

Thanks,
Bill & Harvey
SKID Plants, CT
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