Zones: 3 to 7
Size: 3 to 4' tall, 2 to 3' wide
Growth Rate: Moderate
Needs a moist or low area. Milky sap when stems are cut. Pale pink flowers in late spring to summer on umbel-shaped inflorescences with dark red buds. Attractive to butterflies (Oudolf).
'Alba' - white flowers
Published in Sp. Pl. 1: 215 in 1753.
Native to Canada and the US.
I purchased a 4" pot from Santa Rosa in April 2011 and planted it near the conservatory.