when DOES the ground freeze?
I'm just north of Chicago, and was wondering when I should expect the ground to freeze around here. I know the average 1st frost date is Oct. 15, but want to do some planting/moving of perennials and small shrubs. What's the latest I can do this and still give the plants/roots enough time to reestablish themselves?
(ballpark figure will suffice!)
Many thanks for your help!