I believe manufacturer recommended August-September as a best time, but you could look for exact answer in a link below.
I do spread it when I feel like, though.

Here is a link that might be useful: Milky spore FAQ

Thanks ego, that was great. I guess I should get on with it.

WG

Just be aware that it does not work on Asian beetles or Oriental garden beetles. I have very few JBs now, but tons of the others. It was worth it, though, because the JBs are the worst of the scarab beetles, hands down. It's their communication strategy, that brings thousands of them to a plant once one of them finds it delectable, that makes them so awful. The others don't seem to have that ability, so their damage is easier to deal with.

Digging, that's a good way to put it (communication strategy)!

Thanks everyone. I am shooting for the grubs to reduce rodent activity and am hoping Milky Spore will help.

I re-read the extension service monthly landscape message that Claire posted, and it mentioned that grubs will come closer to the surface after we get some drenching rains. This wasn't reported in the context of JB grubs and milky spore, but just white grubs in general and insecticides.

I found a pretty good article on white grubs that indicates JBs are on the decline in CT. I know it's true in my garden, but I thought it was because I'd used MS a couple of years ago.

Here is a link that might be useful: connecticut gardener - white grubs

So, whitegarden, what's NFT?

NFT stands for "no further text" but it wouldn't let me post without additioal text so I had to add:

"I would appreciate any direction or tips."

And I forgot to delete the NFT. Sorry for the confusion.

WG