So simple no coupon is needed. Your shopping cart will take care of it all. Allow 48 hours for processing and 5-10 business days for delivery. Domestic orders only. *Shipping off the US mainland will incur an additional shipping fee. Includes but not limited to Virgin Islands, Puerto Rico, Hawaii. ** $40 must be accrued for product subtotal alone, including Growing Groupie discount. Not including tax or shipping fee.