I am new to all this pruning also and it scares me to death but I know it has to be done. I have a friend who just whacks all her Clem's off at the ground every year not knowing which group any of them are in. Hers are all loaded with flowers each year. Is she just lucky or could any of the groups be cut off like that and still produce flowers.
When you cut them down you mentioned fertilizing them. What is the fertilizer of choice??