We finally found a product this weekend that satisfies our need to weed less but be kind to the environment. It is called 'Concern'. It's a corn gluten based herbicide that performs similarly to Preen, but without the chemicals. I am so excited about this product! It's absolutely safe for the environment, animals and kids (unless you are allergic to corn). Our cat Posie, actually thought that the bag we were storing in the garage was cat food...she ripped it open and tried to eat a bit. What a relief to know that it won't harm her. I used to feel so guilty when I saw the birds eating out of our 'Preened' garden. Not any more! This product costs about the same as 'Preen'. It doesn't last quite as long, but our growing season is not all that long; and I'm willing to pay a little extra for the peace of mind.