Thank you all so much!
Debra- I think you are as humid as we are, so that's encouraging!
Linda- I have a french lavender growing in our herb spiral. I hope it will continue to do well. It is supposedly not quite hardy for us, so it's good to hear that you are doing well with it!
Scooter- as someone who has lived in several parts of the state, I can tell you that each part of TX is unique in it's growing quirks!
I think I've officially given up on using lavender as a border, but that's ok. I'll probably stick few varieties in here and there that I can replace as needed.