What is that rotten egg stuff you spray around the perimeter?
This is not a 100% endorsement.
However in previous years I would have sunflower plants emerge, get to 2 inches or so high, then the next morning they’re all gone.
Two years in a row I’ve laid down this stuff and no varmints.
You can get it at WM and it has a 100% money back guarantee.
http://www.liquidfence.com/Products/Natural-Animal-Repellents/Deer-and-Rabbit-Repellent.aspx