Hi, there is a field behind my property where I have planted several seedlings over the past several years, all have been successful.
Two of them (a red maple and an elm) are about 7-10 ft at this point, and have split trunks starting 1-2 ft off the ground.
Should I let them continue to grow this way, or should I cut down the second trunk/branch, and tie up the remaining tree for a little while to straighten it up? Should I remove the second trunk/branch all at once, or a little bit at a time? What time of year should this be done?