Jessaka,

Any time in February or March is fine. We usually prune in Feb. down here in southern OK and, since you're quite a bit further north, I'd think March would be a good time there.

I've linked the monthly "To Do" calendar from the Tulsa Master Gardener's website for you, and they have it on the calendar for Feb. or Mar.

Dawn

Here is a link that might be useful: Monthly To Do Calendars from TMG

Thanks Dawn. Great list also. Going to start it now if it isn't cold out.