Geranium, Cranesbill, Hardy Geranium, Lambert's Geranium 'Swansdown'

Very beautiful white flowers, the petals veined in pink and with a crimson center.

The leaves are marbled in two shade of ...Read Moregreen.

Clump-forming. The habit is sprawling, with most of the foliage on the flowering stems. Mounding to 18" when grown alone, but it becomes a scrambler when grown closely with other plants.

The Royal Horticultural Society lists this as a hybrid, G. lambertii x G. traversii. The species G. lambertii is reputed to be weedy.

A plant for cool summers and mild winters. In N. America, this would adapt to the Pacific Northwest, but not the east. I would expect Z8 to be the limit of its hardiness.