I don't have an answer for you, but I did google liquid fence because I have never heard of it before. What are you using it to repel and does it work? I saw that they have it to repel armadillo's which I have a big problem with in my yard. I don't think it would hurt the hummers by what I read, but am curious what you find out!

Tarilyn

My main concern are deer but I also get woodchucks and rabbits. The version of Liquid Fence that I got was for deer and rabbits. I'm assuming it works cuz I haven't seen deer jump the (real) fence to munch on things in the garden and plants along the edges haven't been nibbled on and things inside the garden like a lily that hasn't had a chance to bloom in 4 years because the deer get to it first is about to bloom! I have applied it only twice; on 5/20 and 7/1. Maybe it's just coincidence but I'd like to think it works.

I did hear back from the Liquid Fence people and they said it wouldn't be a problem. I'm not so sure I believe them but I am seeing hummers around the monarda so but who knows if they are suffering from any effects after they leave. I only think it might be threat for a day or two after spraying and we're way past that now. I can't smell it anywhere but it's almost inescapable for the first few days. They say it isn't affected by rain.