HF spreads though roots, I think you'd be OK with cuttings from healthy plants
If it's one of those plants listed and the leaves smell it will be the agastache.
OK, filed in the memory (maybe)
Still looks like one of the leucothoes
I know my alphabet pp
Leucothoe begins with an L
one of the Viburnum opulus cultivars I think
I didn't notice either but I'm not very observant re avatars etc.
I was speaking generally, not pointing the finger at you SV, I'm sorry if it came across like that. You have my sympathy for what's happened in your garden