Originally Posted by THIESSENS TLC
take your pic for example...the mulch would be built up to the bottom of the graft union in your pic. that's about where it is on mine. I was just wondering if it had to be covered or left exposed
Soil or mulch .... it matters not. Don't plant a grafted tree with the union that close to the soil/mulch. Further, if you (or someone else) piled 8" of mulch around that tree, you need to remove it.