Loropetalum - Ack!

Ack! Something has happened to two of my loropetalum plants I put in last month. Most of the bushes look fine, but two look like someone took Roundup killer to them...barely holding on for dear life. It's definitely not an insect problem. And the soil is also definitely not too wet. It has been rather dry, and I know their root systems weren't that great when they went in, so I'm going to work on the assumption they just haven't been able to get enough water. I'm going to be watering them twice a day and also put some liquid Miracle-Gro on them this afternoon. I'm really hoping they can be saved!