I want to screen part of our property and don't want to add any phyllostachys to this particular area (we have some mature oaks and I don't want to stress them too much because I'd be planting the 'boo close-ish to them). Also, has anyone seen how fast they grow? We have had some super cold winters lately, we went down to minus 8 Farenheit,,, so much for global warming. Any and all help would be appreciated! :)