Naturebox Memorial Day Sale Coupon: Save 50% on First Order! EXTENDED! Posted by Hello Subscription on May 29, 2018. Memorial Day Subscription Box Deals / Subscription Box Coupons & Deals / Naturebox Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification NatureBox is offering 50% off your first NatureBox purchase when you use coupon code MEMORIAL50, this week only! Extended Tuesday! New customers only. Max discount $15. OR get a free box when you pick up the Naturebox FREE trial offer!