Hi Peter, I”m an avid gardener, just moved here from Savannah, and found your column immediately! I was very happy about that. My question is about recommendations for columnar trees for either side of the front door on my 2-story Colonial in Clifton Park, facing mostly east. I don’t know anything about junipers or arbor vitae or any of those kinds of trees, but I have 2 questions: the 2 trees there now are 7′ tall, not too far around and I’d keep them except they’re browning out in back. Back half is all brown on both. Can I bring the back half back to life? If not, what columnar tree will thrive there? Can be up to 5′ in diameter and tall. Thanks!! eva@evabowman.com