This Wisteria is being trained to become a tree. Two branches have been confined to a pole, fastened with tree tape. This is the way to do it, but periodically the arborist needs to check tightness of the tape. If allowed, the tape can constrict the growth of the tree and thereby scar the trunk.
If you find the tape too tight, as it is in this photo, you can replace it with new tape, or if the tree is now well trained and strong enough to stand up on its own, you can remove the tape and the support pole all together.
Many young trees are planted such that they are susceptible to wind. In such cases, support is often needed. But, if your tree is protected from the wind, support might be unnecessary.
If you are planning on planting trees, come talk to us.