Can You Leave A Fruiting Tree Sucker Attached To The Parent?

Question

If I allow a peach tree sucker to grow to maturity without detaching it from the parent tree will it will harm the parent tree? Will the mature sucker tree produce fruit?

Answer 1

It will, likely, kill or reduce the growth of the intended tree. Below the graft scion is a rootstock that is fast and hardy, but will not bear fruit of any quality. It is, simply, used as a hardy rootstock for the top grafted portion of the tree.

In short, leaving that sucker will likely destroy your tree over time. You could separate it and root it, but you may find that it is an invasive, and annoying version of the one you purchased.

Also worth noting- Seeing these often is a sign that your tree is stressed. Unfortunately, your photos did not come through, so I cannot see if there is anything readily visible.

https://www.gardeningknowhow.com/ornamental/trees/tgen/tree-sucker-removal-and-tree-sucker-control.htm