Costco Sale: Preen 18.75 lb Weed Preventer For Flowers & Garden $18.69 by Rhonda August 30, 2020 August 30, 2020 *UPDATE* 3/19/15. Costco has the Preen 18.75 lb Weed Preventer For Flowers & Garden on sale for $18.69 (after manufacturer’s instant rebate), now through March 29, 2015. That is $4.30 off Costco’s… 0 FacebookTwitterPinterestEmail
