| Saisson, you should ask for some kind of rebate from your landscaper for such an amateur mistake! White pines grow to be rather large mature trees. I have one growing just outside my back fence and it's about 3 stories high and has a diameter much bigger than my admittedly tiny back yard. I don't know if it can be kept in check by pruning but it certainly wouldn't be my first choice for a hedge-like planting. I can't claim any expertise on the matter. I hope you are taking advice from a different landscaper now, at least. I would also suggest taking your question to the Trees or Shrubs forums. Perhaps you will get more responses that way. You could also try checking out the nearest Arboretum for expert advice. Janet's Garden Blog | 
