Preen Garden Weed Preventer 16 lb drum — granular pre-emergent, covers 2,560 sq ft and stops weeds up to 3 months

Preen Garden Weed Preventer 16 lb provides a granular pre-emergent barrier that stops weed seeds from germinating across up to 2,560 sq ft for about three months.

Maintain cleaner flower beds, vegetable plots, and landscaped areas with a ready-to-use granular formula designed to prevent new weeds rather than kill established ones. The 16 lb drum includes an applicator scoop for even spreading, covers large areas, and is safe around hundreds of established plant varieties when used as directed. Apply in spring, summer, or fall to prepared, weed-free soil and activate the protective layer with water for season-long help in keeping beds tidy and low-maintenance.

How does Preen stop weeds before they appear?

Preen forms an invisible chemical barrier in the top layer of soil that interferes with weed seed germination. It does not affect established plants when applied correctly, so it’s meant to be used around transplants and mature specimens rather than on seed beds.

• Granular pre-emergent formula spreads evenly across soil surface.
• Needs watering after application to activate the barrier.
• Prevents weed seeds from sprouting for up to three months per application.
• Rain-resistant; stays effective after irrigation or rainfall.

Which plants and areas are safe to treat with this product?

The product is labeled for use around more than 200 established flowers, vegetables, trees, and shrubs, making it suitable for mixed garden beds and landscape plantings. It should not be applied where you are planting flower seeds or to lawns.

• Safe around established ornamentals and many vegetable transplants once 2–3 inches tall.
• Not for use on newly seeded flower beds or turf grass.
• Compatible with mulched beds and can be worked into soil when seeding vegetables per directions.
• Check label restrictions for specific plant sensitivities before use.

How do I apply Preen for best results?

Apply Preen to clean, weed-free soil using the scoop included with the drum to ensure an even spread. After distribution, water thoroughly to activate the pre-emergent layer and reapply every 9–12 weeks to maintain season-long coverage.

• Clear or remove existing weeds before applying.
• Spread granules evenly across the prepared area with the provided scoop.
• Water immediately after application to set the barrier.
• Reapply at 9–12 week intervals for continued protection.

What size garden does this 16 lb drum cover and how is it stored?

The 16 lb drum is formulated to treat up to 2,560 square feet, making it practical for medium to large beds, community plots, and around shrubs and trees. The compact drum (approximately 7 x 12 x 14.5 inches) stores easily in sheds or garages and includes an applicator scoop for precise distribution.

• Covers up to 2,560 sq ft per drum for single-application control.
• Compact drum dimensions for simple storage and handling.
• Applicator scoop reduces waste and uneven application.
• Granules remain effective through normal rain and irrigation.

Who this is for: Home gardeners, landscape volunteers, and property managers who want to reduce time spent hand-weeding and protect beds where established plants are growing. Choose this Preen 16 lb drum if you need a reliable pre-emergent solution for medium-to-large planting areas, appreciate a built-in applicator for even spreading, and want a rain-resistant product labeled for use around many common garden plants. Not suitable if you need to remove existing weeds or are preparing seeded flower beds or turf.