As a comment about Vitex (Vitex agnus-castus 'Shoal Creek')
If I had a top 10 list of my favorite plants that I can't live without, this one is definitely on that list, and high up on the list at that.
Tolerant of nearly any soil.
Handles drought and heat without complaint.
Blooms repeatedly all summer long (if properly deadheaded).
If this weren't enough, it has highly fragrant blooms!
The blue color is striking in the landscape.
Astoundingly, it can handle poor drainage, too.
It's perfect for those hot, dry and difficult areas of your yard.
All this, plus the plant attracts beneficial insects, especially bees and butterflies. It's a bee magnet, which is a good thing.
To encourage repeated growth, deadhead the shrub. After it's done blooming it will start making little peppercorn sized seeds. Cut those all off and it'll prompt the plant to rebloom again. You can repeat this all summer long.
The plant responds well to heavy pruning. In fact, it is encouraged to prune it back deeply in order to promote a new flush of growth. Think "Crepe Murder" here. It's actually a good thing for this particular kind of plant.
Love love love it! Don't delay, act now! Add this amazing plant to your southern garden!