I've just been reading about the hired help in your gardens, and I'm wondering if they ever cleaned their tools between pruning or shearing off (I think was a term used)? I'd be nervous about them transferring disease from one area to another.
My two granddaughters have agreed to help me with spring clean up this year. Since they don't know the difference between a dandelion and an emerging hosta, I'm sure I'll have to keep a very close eye on them!