Staghorn sumac.

I planted it 2012 and three years on, it had barely grown at all. So this summer I dug it up, added lots of mulch and fertilizer and replanted it. Since then it has actually grown and even sent out root suckers – and while root suckers are generally annoying, these ones made me happy because I think the tree is finally thriving! I’m undecided between removing all the suckers, or keeping two of them so I get a nice three-stemmed tree/bush group.