I'm currently volunteer propagating for a grower that specializes in the "less-than-common" as it's "that time of the year" and I have a few that I can't seem to figure out what the secret is to getting cuttings to take. One that I have never been able to get to go is Argyrocytisus battandieri http://davesgarden.com/guides/pf/go/1702/ . The cuttings are soft and the foliage flops so quickly.
The other is Romneya coulteri http://davesgarden.com/guides/pf/go/2504/ - cuttings just don't seem to take no matter what I do. Any suggestions are appreciated.