This shrub has upright arching branches that form a spreading rounded habit. It has bright green oval leaves and the whitish cup-shaped flowers appear in clusters from mid spring to early summer followed by capsular fruit. 

Hardiness zones 4 to 9 

Philadelphus lewisii is naturally found in western North America from British Columbia to California in North growing in well drained, moderately fertile moist soils and prefers an open sunny to semi shaded position and is frost tolerant but dislikes drought or high temperatures.

Mock Orange is grown for its flowers and is planted in parks and gardens as a specimen or used in shrub borders. It may be pruned to form an informal hedge and establishes in 3 to 5 years. It tolerates cold conditions and is the floral emblem of Idaho in the USA. It is suitable for coastal or low-mountain regions. ID 1891

Philadelphus (fil-a-DEL-fus) lewisii (lewis-ee-eye)

Hydrangeaceae (hy-drain-jee-AY-see-ee)
Hydrangea and Mock Orange Family