Here are the steps on how to use Promo Code when shopping at superlativetrees.com: Add your favorite items to the shopping cart, then click to log in or create a new account, then go back to the shopping cart interface of superlativetrees.com and select the items you want to buy. Then, click Pay, select the corresponding available Coupon Code, and select your preferred payment method. Please note that each Superlative Trees Coupon has its own rules of use, if your order is eligible for superlativetrees.com, it can be used.