Quart, 1 gallon, 3 gallon
Cityline Vienna is a dwarf hydrangea that grows in a compact mound, covered in big mophead blooms. Summer brings vivid pink or blue blooms depending on soil pH. For blue flowers, the soil must be more acidic. For pink flowers, the soil needs to be more alkaline. Adding aluminum sulfate to the soil encourages blue flowers. Requires very little pruning, thanks to its compact habit. Very disease resistant.