I failed to prune the raspberry canes at the end of last year's cropping. Should I prune to a bud, prune to ground level or leave by just removing the damaged tips?
For all types of Raspberries in March or April you can prune all the canes that produced berries last year to the ground. You should be able to tell by the end of the cane.
Thin the patch by removing thin and spindly canes.
If you have Ever-bearing plants you need to do one more step. Prune the top of each cane to encourage lateral branches. The lateral ones will be your summer crop and the ground canes are the Fall crop.
If the patch is a mess, and you have Ever-bearing, you can cut the entire patch to the ground and have only one harvest in the Fall.