Tracked by Evreward since 2021, Sienna Naturals offers coupons, cash back rebates and rewards, with savings as high as 30% off. Sienna Naturals discount coupons are infrequent, only available a couple times per year. Even when Sienna Naturals doesn't have a coupon, you can always get up to 15% cash back, and other great rewards, with every purchase.