Answer: Hydrangea paniculata 'Grandiflora', the Peegee hydrangea, will grow in full sunshine in your gardening region and will reach upwards of 10' high and 15' wide unless regularly pruned. Expect it to perform wonderfully well when planted in rich, moist, highly acidic soil. You might want to have your soil tested prior to planting. I suspect you garden in an area with alkaline soil. If soil is too alkaline, flower color will be pale. If a soil test indicates the pH is above 6.5, add peat moss, compost or leaf mould to the soil prior to planting your hydrangea.
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