Hydrangea macrophylla ‘Alpenglühen’ is a deciduous mophead hydrangea grown for its rich red summer flowers and bold foliage. From early to mid-summer, rounded flower heads develop in deep rosy-red tones, standing out clearly against the broad green leaves. The colour can vary slightly depending on soil conditions but generally remains in strong pink to red shades. The shrub forms a dense, leafy mound that provides structure in borders throughout the growing season. Hardy in UK gardens, it grows best in fertile soil that retains moisture and performs well in partial shade, where the flowers maintain their best colour.