Top Dress Question
>Have one of my hosta gardens ( 5 years 10x100 ), along a driveway. Same garden has mature Norway spruce as a backdrop.
>Problem--shallow dense fibrous roots from the spuce I am sure are impacting the hosta growth.
Remove hosta--top dress 3-4 inches--replant.
Top dress 3-4 inches early spring over hosta.
>If I leave in place what is maximum top dress depth?
>I realize either is not a permanent solution.