Could someone please tell me why topiary started turning brown after I trimmed it? It did have beautiful shiny green leaves and now it's looking bad.I'm so upset about this! Before and after pic below.
I suspect it's related to the pruning and sudden exposure of internal leaves to full sun and resulting sun scald, and can also be from exposure to infection by fungal organisms from airborne spores, or from contaminated pruning shears.
Have 4 that have ball shape on top,then two ring shape layers below. want to change to cone shape.
It looks like it may have been intended to be a cone at some point. As long as you are not trying to change the, overall, shape of the shrub then it will be fine to do some maintenance.