White Pillar® Rose of Sharon

White Pillar® is a narrow, pyramidal Rose of Sharon with semi-double white flowers that open through summer. Its upright outline suits a sunny border, hedge, or screen where a broader shrub would occupy more space. ## Site and Growing Plant in full sun or part sun in well-drained soil, and water regularly during establishment. Proven Winners lists USDA Zones 5–9 and mature dimensions of 10–16 feet tall by 4–5 feet wide; the narrow form works well along foundations or as a vertical flowering screen. Its profile describes good drought tolerance after the first year and says regular pruning is unnecessary. The [Proven Winners profile](https://www.provenwinnerscolorchoice.com/plant/white-pillar-rose-of-sharon/) gives the current landscape dimensions, flower color, sun exposure, and growing guidance. The [plant patent](https://patents.justia.com/patent/PP28892) identifies the cultivar as ‘Gandini van Aart’ and describes its narrow pyramidal habit and semi-double white flowers. ## Maintenance Water consistently while roots establish, then water during prolonged dry spells. Prune only if shaping is needed, and do so in early spring. Refresh mulch as it decomposes while keeping it away from the stems.