Frost cloth is recommended to use on plants that may need to be protected when there is a frost or freeze warning. Check with your local nursery for frost cloth protection. If it’s a plants’ first summer, younger plants, or a hotter than normal summer, you may need to use shade screen until acclimated.
They may have either agave weevils or grubs. It is recommended to use a systemic insecticide to help control the infestation. Based on how infected it is will determine how long it will take to recover, if at all. Check with your local nursery for more information.