Vinca major. (Periwinkle)
Commonly known as periwinkles these plants are known for thier ground cover and weed supressant capabilities.
Best in part sun or shade excellent for underplanting. The blue flowers appear in ma providing a long season of interest. Fast growing and hardy to frost and drought. Semi evergreen.
Often seen as carpets under trees or covering banks.
Comes in a p9 0.5l pot. These should be planted in fertile free draining soil. No preference to soil type or pH.