Looking for a way to prevent weeds for a beautiful lawn all season long? A single application of Scotts® WeedEX™ Prevent with Halts® in the early spring can prevent crabgrass and problem weeds. Rain, snow, or freezing weather won't affect the product performance, so you don't have to worry about the elements after you've applied. Apply easily with a Scotts® broadcast, drop, hand-held or Wizz® spreader to all lawn and grass types (except dichondra or bentgrass).