My wife has hundreds of Hosta Plants in our perennial garden. We have many deer that come out of the dense woods behind the garden. I tried stringing a hot wire around the garden which didn’t work. I then tried several topical sprays that also did not work. 3 years ago the deer had a whole row of hostas nibbled down to the stalks. That’s when I did another search on the internet and found the Wireless Deer Fence. After installing 3 years ago we’ve only had two leaves on one hosta that had 3 bites out of it (the first year) and none since. We still have deer going through our yard and garden but not touching the Perennials!