The swelling of the flower buds before they open give this plant a special appeal. Grows best in full sun.
prefers full sun, tolerates some shade
Soil & Site
Easily nipped by frost.
Before opening the buds swell and resemble an inflated balloon. The flowers are 2" wide with five petals. Starts blooming early July and lasts for around 4 weeks. Colors are: white, blue, violet, shell pink, double and single.
gray-green leaves, yellow fall color,
erect floppy stems, bleed a milky sap when cut
light colored, deep, thick and brittle
Mariesii has stayed in the 18'-24" range while some of the others will get past 30" Since these plants tend to flop I like to group 3 or more close together and they will support each other.
Mark the plants in the fall since they are very late to emerge in the spring. Emerging in early May. Dig a large clump when transplanting to avoid breaking the roots.
easy from seed, careful division of the brittle roots
China and Japan
Reported to produce good cut flowers if the ends are seared with a flame.
Notes & Reference
#04-Herbaceous Perennial Plants (Allan Armitage), #30-Gardening with Perennials Month by Month (Joseph Hudak)