I don't know how to keep the swing the same height from the ground. Well, I've been watching this tree and it has been growing about two feet every year. I'm afraid that next year my swing will be too high off the ground for me to reach it without my ladder. Hey no worries. Of course not I never listen to him.
Plants grow in length from the tips.
This type of growth is called primary growth and it arises from the primary meristems. Just kidding lighten up. I remember now that meristems are the only regions of the plant that are capable of cell division. Unlike animals, not all regions of the plant are capable of division. Cells only divide in the meristematic regions like those at the tips of roots and shoots.