Polemonium Yezoense 'Purple Rain' - Jacobs Ladder
This very unusual variety of Polemonium is a native to Japan, it grows with unusual fern like purple-green foliage.
In late spring, it produces dark, tall stems with clusters of 5 petaled lavender blue flowers with cream centers.
Evergreen in mild winter areas, it is happy in most soil types with consistant moisture, and full sun to partial shade.
Grow to a height of around 30 to 60 cm, and a spread of around 30 to 45 cm.
Fully hardy to -15°C.