Johnson Grass Control: Flamers Fail, Persistence Required

Homeowner asks about propane flamer for Johnson grass in Bermuda lawn.

Flamer Verdict

Ineffective and time-wasting. Johnson grass is a deep-rooted perennial with white, node-bearing rhizomes (~1/4" diameter).

Effective Approaches

• Small patches: Shovel—dig up roots, dispose off-site or burn
• Herbicide: Glyphosate (Roundup) at label rates, before seed set (mid-late summer). Repeat immediately upon regrowth. Requires years of persistence.
• Additives: Consult local extension for Johnson grass-specific adjuvants

No Quick Fix

Multi-year commitment essential. Mechanical removal works for isolated plants; herbicide programs need exact timing and follow-through.