Dovita from Lutherville Maryland writes
Grass Out Max (Clethodim Herbicide) is labeled to be used on Asparagus fern and many other ornamentals, ornamental trees, shrubs and broadleaf plants. We would suggest doing a small spot test to ensure a broadcast application would not harm your ferns.
View the full list of tolerant plants on the product label HERE.
Answer last updated on: 08/07/2021
