1 to 2 feet
Plants will grow to 2 feet if left alone but are easily trimmed to any height.
1 to 3 feet
Late June through August.
Flowers are purplish-blue. Pink and white varieties are available.
Plants are bushy. Easily pruned into preferred shape.
Shape in flower:
same as above
Flowers borne on long, narrow, one-sided whorls in terminal spikes.