Hello Melissa, I prune my lantana in early Spring. I wait patiently for our overnight temps to be at least in the 45F to 50F range. Our daytime highs is okay but it is the overnight temps that delays me where we are still getting 30F.
And right now it is a weird weather pattern, with a very dry winter and cold overnights stretching longer. Don't know if conditions in your area is similar to mine.
I start getting my buds towards late Spring, and a second flush of blooms towards Fall when temps return to 75F to 90F, after the triple digit summer dry heat period.
