Preen® Garden Weed Preventer + Plant Food, 16 lb., Covers Up to 2,560 sq. ft. Horse Health Supplies One quart of concentrate makes

One quart of concentrate makes 8 quarts of ready-to-use fly spray

Use as part of a routine plant care program

from puppies to seniors

this spray delivers both immediate knockdown and residual control for extended protection from gnats

Preen® Garden Weed Preventer + Plant Food, 16 lb., Covers Up to 2,560 sq. ft. Horse Health Supplies One quart of concentrate makesPreen Garden Weed Preventer + Plant Food, 16 lb. Preen Garden Weed Preventer + Plant Food provides dual action garden care by preventing new weeds while delivering nutrients that support healthy plant growth. Designed for established garden beds, this formula works throughout the season to encourage strong roots, fuller foliage, and improved plant resilience. It does not kill existing weeds but helps stop new ones from sprouting, reducing the need for