I have an area of about 650 sq ft that I planted several small trees and about 10 shrubs last year. I put a light amount of mulch in the area but grass has covered most of it back up.
I want to do the mulching properly so I see two options: - remove all of the existing sod and add 4" of planters mix. - put down cardboard / weed barrier on top of the sod and add the 4" of planters mix.
Which one of these will be the least disruptive for the existing plants and or the better long term solution?