Seems like things work for a year or two and then the deer figure things out (or get hungrier....) For a couple years now, I've sprayed a mix of 2 T cayenne pepper and 2 T Sirracha hot sauce in a hose end sprayer on all my foliage early in the year and then a few weeks later. Seems to work. I saw one daylily bitten off and spit out the first year I did this. I think maybe they don't like spicy food! Anyway, it's cheap and certainly doesn't hurt.
