I live in Zone 7B. I know lantana is normally planted in spring but is it too late to plant in my zone?

Lantana is tough, I would plant it almost any time.

I second the motion.

Here's a link that specifically refers to MS gardens.
http://www.butterflywebsite.co...

You'll need to scroll down aways to get to the section called 'Hardy Perennials for Mississippi Gardens'. Note that it says Lantana's bloom season is Spring - Fall.

Here's another link from the MSU Extension Office. Note that you can find the extension office for your county if you have more questions,

http://extension.msstate.edu/n...

Go for it! And happy gardening.