Check your fences!
The Damn Bunnies (tm) wriggled their way through a cord of firewood to get through the one gap I had in the fence protecting my hollyhocks. Pretty much what I deserve for underestimating the little bastards. I planted them last year so this was the year they were supposed to bloom. WAH! Still, they seem to be tough little plants so there's still hope for them. They'll bloom, if not this year then certainly next year. *readies anti-rabbit flamethrower*