So, I have two Longan trees that's too close to each other, the left one is Biew Kiew and the right one is Kohala:
They are about 1.5ft apart:
So let me explain how this happen:
Early 2017 I planted the Kohala (right) and it was the only Longan tree I grew. Then when Hurricane Irma came, I dug it out and move into my garage. After the hurricane, I put it back into the ground. I didn't know Longan doesn't like to be moved so it never recover well, and at some point it only had 3 leaves on the tree, and the trunk were dry and brittle. I thought it's not going to make it.
Fast forward to early 2018, the Kohala still didn't recover. I was at the nursery and saw the Biew Kiew. I think Biew Kiew taste better? Anyway, I bought the Biew Kiew, put it into the ground next to the Kohala thinking that the Kohala will die in the summer so didn't bother to dig it out. As of right now, they both grew really well and the Kohala bounce back become more flush than the Biew Kiew.
My question is, if I leave them the way it is, would it be okay? For how long before the trunk of each tree will hit each other? If I really really really have to scarify one tree, which one do I keep? I don't have any more space in my yard for the extra longan tree.