Neal they are the standard leafed variety. I just got some Martha Washington's on clearance and I'm going to fertilize them every few waterings and see what happens. I have talked to some local people who have *gorgeous* Geraniums and one uses a weak solution of MG every time she waters and the other one uses Monty's "Root & Bloom (2-15-15) every time he waters! I just bought some of the Monty's fertilizer.
The red Geranium is doing better, now that I'm fertilizing it more often but I have some that are in a container with mixed annuals and they never seemed to grow much.
I'm going to try to winter some over this winter.
BTW all my containers have MC potting soil with Osmocote and I can't see where that made any difference!