I need some advice on trimming yew (spelling) bushes. The lady has let them go sooooo many years that they are really overgrown. She wants them cut back over a foot because they overhang the bed that bad. I can do it, but the question in mind is, if I cut them back a foot it will cut all the green off leaving only the branches. She doesn't care how it looks now but needs it to grow back adventually. Will this kill them trimming the one side back a foot or will they grow back?? Any help would be greatly appreciated.