This shrub prefers full sun to light shade. Grown in part shade (6 hrs of sun/day or on the West side of a house) it takes 3 or more years to establish itself before becoming full and blooming well. I highly recommend this hydrangea for mostly sunny sites with good root mulch to help retain moisture. Based on its performance in my yard (West side, hot afternoon sun) I doubt it would perform well with Eastern or Northern exposure in all but the warmest, sunniest climates.
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