Bobo hydrangea is the trade name for a dwarf variety of the panicle hydrangea ( Hydrangea paniculata 'Ilvobo'). While similar to other hydrangeas in every other way, including care needs, it grows only 2 to 3 feet high and slightly wider. Bobo is a new dwarf hardy hydrangea that will attract a lot of attention. The strong and sturdy stems on this dwarf plant will hold flowers upright. An abundance of white conical flowers cover this hydrangea from summer to fall.