Grouping Heritage River Birch
We have two clumps of Heritage River Birch in our yard. perhaps 15 feet tall and 3 or 4 years old.
How close can I plant another set of three. How wide do they normally get. Do they REALLY get 30 feet wide? We want to plant a set of 3 as a semi privacy tree but I'm worried that I don't have enough room.
Friends say GO AHEAD but I feel many people plant trees to close to each other.