New hydrangea with white to ever so light pink blooms

We found another compact Arborescens that starts white then tinges to a soft pink with time.  Bloom time is late June through September. The foliage has a healthy green color with a bronze tint. Sturdy branches hold up the huge blooms well. Marshmallow is going to be a great compact hydrangea growing to just 3x3'.

Hydrangea arborescens 'GRHYAR1406' PP31,121