Where I live in Australia the cyms all grow on trees

Occasionally you find one growing on the ground but it's usually when the branch they were on has dropped off. I have Cym suave and Cym madidum mounted in various ways, they like their roots to stay fairly moist but dry air doesn't seem to worry them too much and in winter here we can get some pretty heavy duty frosts and yesterday it was 45 degrees celcius and they grow fine under the trees and under my patio. I go out and throw some water from the hose on them every day until they are established and every few days once they get some good root growth happening and they seem to do fine.