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.
Let's Dance™ Blue Jangles Hydrangea
Hydrangea macrophylla 'SMHMTAU' USPP 27,035
Proven Winners has created the perfect hydrangea for every shade garden with the Let's Dance hydrangea series. Whether you need an extremely dwarf hydrangea or a medium sized one, you can find it with these blue beauties. Let's Dance Blue Jangles is the perfect choice if you don't have much room in your shade garden, since it is truly dwarf, reaching only 1-2 feet tall and 2-3 feet wide. Blue Jangles has tight, compact growth, and reblooms on both old and new wood--so no fear of pruning it incorrectly! The flower color can be changed as well, and will bloom blue in acidic soil and pink in alkaline soils.