The active ingredient in Preen is trifluralin. It is a suspected carcinogen, and is toxic to fish and aquatic life, and earthworms.

What happens if you inhale Preen?

Causes moderate eye irritation. Hannful if swallowed, inhaled or absorbed through the skin. Avoid contact with eyes, skin or clothing. Users should remove clothing immediately if pesticide gets inside.

Is Preen Organic safe?

Preen Vegetable Garden Organic Weed Preventer is safe to use around children and pets and there is no waiting period to enter the area after application.