Seeds without pesticides can be purchased in many pet stores..Walmart even sells it in the pet aisle. I think it's rye grass...never use seed for lawns! I made the mistake once of planting some in a long planter figuring there would be more grass for the cats to chomp on. It was turned into a bed, some of the foster monsters dug into the dirt and I'd come home to a mess! So best in a heavy small planter that retains water well.