So I had the same problem in Aug. and Sept. trying to plant things for autumn harvest, A squirrel ate almost every seed I planted, including radish seeds.

So this year I got some mesh and put it over some of my seeds, but its really a lot of extra work because the type I got wasn't the best, I just got what they had. I think though that the squirrel in question may have found a new yard to haunt ... I mean live in.
I've heard that squirrels will stay away if people put out realistic squirrel sculptures and move them every couple of days, I think that may be a good idea, I'm thinking about doing it myself, as the mesh is a pain. Has anyone tried the sculpture method, does it work?
Celtic/fantasy/folk/shanty singing at Renaissance faires, fantasy festivals, and other events in OR and WA, USA.
RionaTheSinger on youtube.
Pop-up garden/vintage+ yard stand owner.