Althea 'Double Red' (Hibiscus syriacus 'Double Red') can tolerate light shade, but it performs best in full sun. In partial shade, it may produce fewer blooms, but it still remains healthy and attractive. Here is the updated version reflecting that: Althea, Double RedHibiscus syriacus 'Double Red' Height: Typically 6–10 feet tallSpread: Approximately 4–6 feet wideSpacing: Plant 4–6 feet apart for full coverageGrowth Rate: ModerateDeciduousOrnamental tree DescriptionAlthea Double Red is a beautiful flowering shrub that delivers a long season of bold color and fresh texture. From midsummer into fall, it produces a stunning splash of deep reddish-pink, double blooms that cover its upright, vase-like form. The lush, green foliage offers a tidy contrast to the vibrant flowers, making this hibiscus an inspiring focal point in borders, entryways, or mixed shrub beds. With its refined structure and long bloom time, it provides one of the most satisfying displays in the summer landscape. General Care Sunlight: Prefers full sun; tolerates light shade Watering: Water regularly after planting to establish a strong root system and support bud development; once established, requires minimal supplemental watering except during prolonged dry periods Mulching: Apply a 2–3 inch layer of mulch to help retain moisture and regulate soil temperature Pruning: Prune in late winter or early spring before new growth begins to maintain shape and encourage strong flowering With its magnificent flowers, textural foliage, and upright form, Althea Double Red is a gorgeous, easy-care shrub that brings lasting color and elegance to the landscape throughout the warmest months of the year.
