thanks for the responses Greene and Elaine! I have Hamelia out front but didn't think it would tolerate more shade. Time to root some cuttings! And I have some firespike in hat bed already. You are right about the pruning- I have a hard time pruning it because I hate to cut off any branches with blooms since the hummingbirds love it so much. It would like a little more sun I think; either that or my pH is off.
Do you think plumbago will tolerate shade? I have one in the sun but I think I may end up moving it.