I'm Brock. A first year gardener (zone 7b) who was very glad to find your site.
The week of Good Friday this year I did nearly all of my planting. This included (10) L. munstead, (2) French and (2) English.
Due to heat I lost a few (mostly ones I had planted up the driveway in the hopes of them coming back for years to come) so what remains is (8) munstead, (1) French and (1) Engilsh.
Since its July I am really having to watch them. They thrive in the heat, humidity, but watering them is a fine line. I have noticed that if it starts to turn brown, there is little you can do.
All that are potted are done so in well-drained containers. I'll attach a few photos.
I know that lavender doesn't do as well potted, but I want to bring them in over the winter and they just look so nice that I wouldn't even want to plant them. And the one English Lavender I did plant took off like a rocket, only to dry out in a matter of days. The English I have potted is probably the doing the best, along with the French.
After nearly four months of care, I have no blooms. Well, one pitiful bloom on the French.... I like plants so its ok, but I really would like for them to fully take off.