Shade hydrangeas prefer moist soil and regular watering during the growing season. For most, in order to obtain the blue flower color, apply 2 tablespoons of aluminum sulfate near the base of the plant. A rusty nail or coffee grounds will also increase the acidity of the soil which makes the flowers turn blue.
Tuff Stuff™ Red Hydrangea
Hydrangea serrata 'SMNMAKTSR' USPP 28,672
Tuff Stuff™ Red Hydrangea is a little powerhouse that shows big! Compact in size, blooms appear early summer an exhilarating blend of light pink and lime green, and mature into a deep pink, reddish hue. Tuff Stuff™ reaches a mature height of 2 to 3 feet and a mature width of 2 to 4 feet. This repeat bloomer is great for border, container, mass planting, edging, focal, specimen, water garden, accent, and cut flowers.