What Herbicide Will Kill Ferns?

What Herbicide Will Kill Ferns? Glyphosate, a non-selective, systemic herbicide, kills the rhizomes as well as the fronds of many invasive ferns. Choose a day with little wind, and then spray the fern’s fronds liberally with a ready-to-use glyphosate solution. What weedkiller kills ferns? Systemic weedkillers containing glyphosate For gardeners, glyphosate is the most effective