I bought 4 potted pine Christmas trees 3 years ago, topped them severely, and they are thriving in my homemade soil mix (even thru the Texas summers). But they still look like pompoms on a stick. Is is safe to hard prune most of the bushy branches to give them a real Tree shape? I have let the lower branches grow really long, but they are so thick you can't see the trunk at all.
Thank you for any advice.
~Marcia Cash, Traveler in Thyme