Rhododendrons bring vibrant spring blooms and year-round structure to Southwestern Ontario gardens. These shallow-rooted shrubs thrive in acidic, well-drained soil enriched with peat moss, positioned in morning sun with afternoon shade and protection from harsh westerly winds. Keep soil consistently moist without waterlogging, especially during dry spells. Apply 5 cm of pine bark or pine needle mulch to retain moisture and maintain cool roots. In early spring, feed with an acid-loving plant fertilizer (such as 4-12-8) before mid-June to support healthy growth. Before winter, water thoroughly and consider burlap protection in exposed areas to shield from sun and wind burn. Prune immediately after flowering to encourage next season's blooms. Watch for yellow leaves—a sign of insufficient soil acidity—and ensure adequate light if flowering slows. With proper site selection and consistent care, rhododendrons reward gardeners with stunning, long-lasting displays.
