What Are the Sunlight Requirements for Hydrangea macrophylla Magical Ruby Red ('Kolmaru')?
Partial shade

Hydrangea macrophylla Magical Ruby Red ('Kolmaru') · Hydrangea macrophylla Magical Ruby Red ('Kolmaru')
Grow in any moist but well-drained soil in partial shade or grow in sun if soil remains reliably moist. See shrubby hydrangea cultivation for further advice
Partial shade