Ridgetop
Herd Master
You might try digging out your favorites that he cut down. Wrap them in moist newspaper and put them in the fridge for a couple weeks, then try planting them again. Maybe he did not kill them completely, and by refrigerating them you can trick them into dormancy again. Planting them outsiide in a month maybe they will wake and put out shoots. Worth a try if your knees can take it. 

Time to hem some jeans into bermudas. Don't do shorts much. Need some new jeans but, they don't make them like they used to!