Name: Stan Florida Panhandle (Defuniak Sp (Zone 8b)
@Marilyn
As long as the hummingbirds are present, the feeders are out and refreshed almost every other to every three days. If the least bit of sourness is detected, the feeder is scrubbed and refilled with fresh.
Edit to add... We do have salvia, shrimp plant and other plantings the hummingbirds love so.
edited to add.... we too have salvia, cuphea, agastache and other plantings that attract them too. We only get hummers here spring to around mid Oct. or whenever we stop seeing the migrating ones, but we keep putting out fresh nectar.