RRose of Sharon (Hibiscus syriacus), aka althea, is a popular summer flowering shrub and small tree (USDA hardiness zones ((4)5-8). In northerly areas of the U.S., rose of Sharon may also be cultivated as a sun-loving perennial. The species grows 8-12 feet high and 6 -10 feet wide in full sun and in average garden soil. Shrubs, native from China to India, are drought tolerant once established for one year.

The Rose of Sharon (Althea) Pillar® series represents two unique columnar shrubs. Both cultivars, White Pillar® (white flowers) and ‘Purple Pillar® (lavender flowers), grow 10-16 feet tall and only 2-3 feet wide.

The Pillar althea series develop few to no side branches with little or no pruning needed. As the shrubs age, some minor spring pruning may be needed to maintain the narrow columnar form. During seasons of excessive rainfall, rose of Sharon may grow too vigorously and splay open. You may opt to clip off to hold the narrow look.

Plant in multiples of 3 or more for a formal front entrance. A lone plant standing by itself may serve as a landscape focal point. Plant in containers and grow on a sunny deck or patio. Perhaps you wish to conceal an unsightly utility box or create a short hedge or living privacy fence between you and your neighbor.  Pillar altheas don’t take up lots of space width wise, perfect for a small urban garden or narrow planting spaces.

Rose of Sharon bloom on current season’s wood from late June thru August. Young plants start to bloom early. Its light purple blossoms of Purple Pillar feature deep red centers that really stand out in the garden and are stellar additions to cut flower arrangements. White Pillar bears snowy white blooms.

Their colorful flowers attract bees, butterflies, other pollinators, and an occasional hummingbird. This tough cold hardy shrub plant holds up well to heat and dry weather and deer don’t bother these shrubs. In some areas of the U.S., Japanese beetles may be an occasional pest.