This was such a warm winter that my garlic grew all winter instead of coming up in the spring. I noticed the leaves starting to turn brown in late May. But I left it in there until I could see that it was truly ready to be pulled.
But I may have been a bit late.
I am curing them on a window screen over the 3 sided box my bird's cage sits in most of the year. The box is to contain his seeds. I decorated it so it's not just a box, and he can look out the window to the front. During the summer he is moved to the screened porch.