Stinging Nettles in St. Augustine: Organic Solution

Identify the Weed

“Stinging grass” is likely stinging nettle (Urtica spp.)—painful hairs, thrives in disturbed, nutrient-poor soil.

Why Chemicals Fail

Herbicides kill nettles temporarily but destroy soil microbes. Nettles return because the underlying condition (poor soil) persists.

Organic Fix

• Apply 4–5 lbs sugar/1,000 sq ft spring and fall; water deeply.
• Add compost tea, alfalfa meal, lava sand annually.
• Deep weekly watering (6+ inches) trains St. Augustine roots down.
• Zero synthetic chemicals—let beneficial insects (lizards, toads) manage pests.

Results

One Texas gardener eliminated nettles, fire ants, grubs, June bugs, and aphids on roses—entirely with sugar, deep watering, and mulch. No sprays for 6+ years.