Lantanas start showing signs of growth late in the season. I have "Miss Huff"
and I have yet to see any signs of green on the plant this spring. This is the
fourth year for my plant and I had your same concerns the first spring for my
lantana. Finally, I started seeing some growth in late April.

Were your lantanas "perennials"? Some lantanas sold by the nurseries and garden
centers are annuals and will not come back. Did you have named varieties?

Hope this helps.