Yes Salvia's can be air layered. there are other members of the mint family that can be air layered.
Art

Thanks for the info Hybridsage thats something I can do without complicated instructions, I suppose its a spring summer thing .
John

The Salvias that bloom in cooler months will root in higher percentages then.
The more tropical species root during late spring(Warmer temps).Some of the creeping forms should do better doing
root cuttings or some side shoots gently seperated from
the main plant.
Art