Monterey LG 5130 Weed Impede (Surflan) Herbicide, One Pint Monterey Weed Impede 16oz A great pre-emergence herbicide for use on ornamentals, trees, roses, bulbs, ground covers, shrubs, rock gardens, driveways, and unplanted areas Very economical to use, 1 pint treats 5-10,000 sq. ft. Lasts up to 6 months to control grasses, weeds, and you can tank mix with Remuda or Roundup in unplanted areas