Will this work to keep deer out of my yard if sprayed around the entire perimeter? How often do you need to reapply?

Yes, this repellent will work very effectively against deer and rabbits. Apply liberally to plants and their perimeter during a dry period. Repeat process one week later and then approximately once per month thereafter. In areas where feeding pressure from deer and rabbits is intense, spray once a week for three weeks and then approximately once per month thereafter.

I have about an 1/8 acre garden and ha e no problem with deer or rabbits in it. Repply according to the directions, but I usually reapply it about once a month but only on the perimeter.