Herbicide

Ronstar FLO

Also labelled for use in these areas:

Ornamentals
Herbicide

Ronstar FLO

Product Overview

Ronstar herbicide controls weeds through shoots, not roots. So unlike competitive products that don’t distinguish between roots of weeds and roots of desirable plants, Ronstar doesn’t harm healthy turf. This product can be applied to sensitive grasses and areas where roots are already weakened by winterkill, pests or injury.

Key Benefits

Works on warm-season grasses

  • One pre-emergent application – even in cold weather, or weeks before seed germination – controls weeds all season long
  • Offers an environment conducive to sprigging
  • Doesn’t inhibit turf root growth or recovery from damage
  • Doesn’t prevent roots from tacking dow

Use & Control

Broadleaf weeds:
Bittergrass, bristly oxtongue, carpetweed, cheeseweed, common groundsel, common purslane, evening primrose ragwort, lambsquarters, liverwort, oxalis, Pennsylvania smartweed, prostrate spurge, redroot pigweed, sow thistle, speedwell, spotted catsear, swinecress, yellow woodsorrel

Grassy weeds:
Annual bluegrass, barnyardgrass, carpetgrass, crabgrass, fall panicum, goose grass, green foxtail, wild oats

Please see the product label for a full list of pests

Related Resources

White Papers

Label

SDS

Use & Safety

Map

State Approvals

Ronstar FLO has been federally approved and registered in all continental US states. Contact your Envu representative to learn more.

ronstar flo states registered map

This map was most recently updated June 2, 2025

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