Big, bright flowers make this potentilla anything but dull! Happy FaceŽ Yellow potentilla offers extra-large bright yellow flowers, and lots of them. Blooming non-stop from spring to frost, this super durable plant will put a smile on your face. Needs little maintenance and is highly deer resistant. Native to North America. Prefers moist, well drained soils but will tolerate poor, dry conditions once established. Prune off one third of the branches in late winter to keep the habit full and attractive.