Two years ago I got my first outside space and my first plants, I have a penstemon and osteospurnum which I did not prune in spring, they both went mad with new shoots all along the stems which have themselves got very woody, what I would like to know is whether I can prune them in spring and if I can, can I prune them down to the ground, into the old wood? I also wondered if I can use all the new shoots to take cuttings from? I also have two verbena bonariensis and I wondered if I can take cuttings from these and if so how? I would be very greatful for help, thank you.