Codonopsis clematidea

This rare, sprawling alpine has an untidy habit and sometimes pungent foliage, but is so worth growing for the pale blue nodding flowers with maroon-orange interiors. Easy to grow in full sun to part-shade on well-drained soil. Supports itself by sprawling through and around other plants.

Growing tip: these plants aren't necessarily noticeable for the first few years after planting. After a few years though, you will see them take off. Patience, patience. 

Zones: 3 to 7
Family: Campanulaceae
Type: Perennial
Height: 18 to 24 in.
Spread: 18 to 24 in.
Exposure: Full sun, part-shade
Soil Conditions: moist, well-drained
Bloom Time: June to July
Bloom Color: Soft Blue
Native Range: Central Asia