With the age that this Maple now is, and with the main issue of having two dominant leaders, there is no way to easily fix this tree. Red Maples are notorious for not maintaining a central dominant leader and will constantly develop co-dominant leaders. Without constant attention and pruning, the tree will continue to grow improperly and will at some point in the future, split apart. It is similar to the problem with Bradford Pears, the question is not whether they will split, just a
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matter of when.
If you remove one of the trunks, you will have a very ugly tree, because you will be removing much of the foliage on one side. Had this issue been addressed when the tree was younger, it may have been corrected. If you remove one side now, the exposed cut will be a large area susceptible to insect, disease, and rot. And even if you remove it, you will have to continue almost annual pruning of the maple to keep it from happening again and again.
My suggestion would be to remove the entire tree and plant a new tree, not one of the inexpensive and popular red maples.
If anyone wants proof of just how bad red maples develop multiple leaders, just drive around almost any commercial parking lot, which are normally full of red maples, and look at how bad the internal structure of the trees develop. Over time, as the tree matures and the weight load increases, something will fail, split, and fall over.
In summary, a red maple can be a beautiful tree, but due to the soft wood, and the tendency for multiple leaders and poor branch angles, the tree will require constant pruning and attention to maintain it in a healthy and strong form. Without giving it this attention, I would recommend a different tree.
If you remove one of the trunks, you will have a very ugly tree, because you will be removing much of the foliage on one side. Had this issue been addressed when the tree was younger, it may have been corrected. If you remove one side now, the exposed cut will be a large area susceptible to insect, disease, and rot. And even if you remove it, you will have to continue almost annual pruning of the maple to keep it from happening again and again.
My suggestion would be to remove the entire tree and plant a new tree, not one of the inexpensive and popular red maples.
If anyone wants proof of just how bad red maples develop multiple leaders, just drive around almost any commercial parking lot, which are normally full of red maples, and look at how bad the internal structure of the trees develop. Over time, as the tree matures and the weight load increases, something will fail, split, and fall over.
In summary, a red maple can be a beautiful tree, but due to the soft wood, and the tendency for multiple leaders and poor branch angles, the tree will require constant pruning and attention to maintain it in a healthy and strong form. Without giving it this attention, I would recommend a different tree.