I actually live in Pa. But I can tell you that you are going to do well with that kind of Soil. I water mine every other day, they do require moist soil. Don't over water but be sure that they are in moisture. Also if it get's to hot and you have not had any rain I would suggest grabbing a spray bottle and around dusk, spry them with water. Do not spray them when the sun is out, it can and will burn the plant. I hope that helps you.

No clue here for I too am in the Frozen North. But I would opt for maybe the Spanish types that like it warmer.

FataMorgana

Lavender will do well until the summer heat and humidity sets in and then it will probably decline. I have some too to enjoy as long as I can.

"Wanting the hedge look"

If I understand what you are looking for, rosemary would be another possible choice. I've seen nice sheared hedges of it and it has small lavender colored flowers which are attractive. Someone else will have to tell us if it will do well in Florida but I believe it will.

Jim

Needs really well drainging soil and some shade for summer heat ... watch it during the really wet months I mulch around mine before a bad rain to absorb the extra water .... do you know what kinda of lavender it is

I also live in the north but during the summer of 2012, one of our hottest on record, my lavender did fine. I have many varieties, but L. 'Grosso' is my favorite.

Linda