Philadelphus 39starbright39 produces fragrant single white blooms with yellow stamens in early summer these flowers are larger than those of other mock orange varieties new growth in spring is flushed purple rapidly maturing into vivid green foliage which contrasts spectacularly with the snowy blooms philadelphus 39starbright is a hardy medium sized deciduous shrub which fits effortlessly into a larger mixed display this mock orange also makes an attractive specimen plant height