Make sure you check your email for your Home Depot Garden Club Newsletter . I just received a BOGO coupon for an Ortho EcoSense. They carry a line of 100% natural insecticidal soaps and well as plant and rose care. They also have a weed control product but you can use the cheap and effective vinegar for that. Sometimes you even get a coupon for Home Depot Fertilizer.
There was also a $3.00 off coupon for Miracle Gro which I am so happy about. So make sure to check your email for these great coupons.