Miracle-Gro Garden Weed Preventer 1 will provide up to 3 months of pre-emergent weed protection, so you would need to wait at least 3 months before planting seeds. You can apply the product to established flowers, which are flowers that have been growing for at least 2 weeks.
Miracle-Gro Garden Weed Preventer 1 is not labeled to be used on fruits like blueberries. It should only be used on the labeled vegetables.
