Preen Garden Weed Preventer

No, this is a pre-emergent herbicide, meaning it only stops new weed seeds from germinating. You should remove any existing weeds by hand before applying the granules to ensure your garden beds are clear.

Yes, Preen is safe to use around many established vegetables, flowers, trees, and shrubs. Always check the product label to confirm your specific plant varieties are included in the list of over 200 safe species.

Each application provides protection for up to three months. For continuous, season-long control, you should reapply the product every 12 weeks throughout the growing season.

Preen features a rain-resistant formula, so it remains effective even after exposure to rain or irrigation. However, you should lightly water the area after application to help the granules settle into the soil.

While Preen is designed for garden use, it is best practice to keep pets and children out of the treated area until the granules have been watered in and the soil surface has dried completely.