Potentilla fruticosa 'McKay's White' is a hardy, low-maintenance deciduous shrub, typically growing 2–3 feet tall and wide with a mounded, compact shape. It features creamy-white flowers with yellow centers from late spring until frost, set against fine-textured, deep green foliage. Ideal for full sun, it is drought-tolerant, deer-resistant, and suitable for borders or mass plantings in zones 2-7. 
Key Characteristics
Flowers: Creamy-white, cup-shaped flowers with yellow centers, blooming from late spring to fall.
Size: Typically 2–3 feet in height and width, forming a dense, rounded, mounded shape.
Foliage: Deciduous, with fine-textured, grayish-green to dark green leaves.
Hardiness: Extremely hardy (Zones 2b-7), making it excellent for northern landscapes. 
Care and Maintenance
Light: Requires full sun for best blooming, though it can tolerate partial shade.
Soil: Adaptable to various soil types, including sandy or clay, provided they are well-drained.
Water: Low to average water needs once established, with good drought tolerance.
Pruning: Best pruned in late winter or early spring to maintain a compact shape and remove old stems.
Uses: Excellent for borders, foundation plantings, mass planting, or as an accent plant.