Sweet mock-orange is a large, upright growing shrub with delightfully sweet, fragrant white flowers in early summer. Philadelphus Mock Orange shrubs vary in size and some leaf structure. All have glistening white flowers ranging from tiny, starry little things (four-petalled) to large, bouffy double blossoms. Flourishing in zones 4-8, this deciduous shrub is … They look great in rows, and really smell great when planted in groups. This plant is very useful as a hedge or anchor plant near buildings because it will only need trimming twice a year. Mock orange shrubs are hardy in Zones 4-8. Compact, Pittosporum tobira 'Nanum' or 'Nana' (Japanese Mock Orange) is a small, broadleaf evergreen shrub featuring attractive, leathery, dark-green leaves, glossy on the top and with lighter undersides. Adding compost to the soil will help improve most issues. Flowering time for Philadelphus virginal is early summer. Philadelphus mexicanus 'Double Flowering' (Evergreen Double Flowering Mock Orange) - This is a climbing evergreen shrub that can clamber to 15-20 feet. Philadelphus lewisii: Mock Orange Philadelphus lewisii is tolerant of a wide variety of conditions, from full sun to partial shade, from moist to dry. This mock orange is the ‘grand daddy’ of them all as far as size is concerned. However, these showy plants all have one thing in common — they all produce an abundance of eye-catching white or yellow petaled flowers with bright yellow stamens that possess a heady aroma. Sweet Aroma, Pure White Blooms & Evergreen Foliage Why Sweet Mock Orange Shrubs? Mock orange benefits with mulch in spring and an application of balanced organic slow-release fertilizer – this is especially needed when hard pruning. Its … The Mock orange has been the official state flower of Idaho since 1931. Growing Conditions for Mock Orange Shrubs. It has a naturally mounding shape spreading equally to its height. Most types that are hardy for us are deciduous (drop their leaves in winter) but more southerly species can be evergreen. Plant Mock Orange shrubs in rows along your property line to create an ornamental privacy screen or use them as a decorative backdrop for lower growing shrubs. The mock orange shrub thrives in a sunny location and can tolerate partial shade or light shade site.The soil should be moist, humus-rich and well-drained.It is best planted in autumn through to early spring-time. The Syringa (Philadephus lewisii), or Mock orange, is a perennial deciduous shrub that's native to the Northwestern United States, including California, Washington, Oregon, Idaho and Montana. They are arranged alternately in a whorl around the stem and provide a dense foliage year-round. It can survive well on available rainfall here in the valley and is known to be quite drought tolerant, though sometimes a little additional water can help it to thrive and flower more vigorously. 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