Moss Phlox (Phlox subulata) is a richly flowering, clump-forming phlox that stays green in both summer and winter. In spring these plants produce innumerable crimson and white flowers that attract butterflies. Phlox feel at home planted in full sun.
This is how to make a vertical garden design for planting a tower of herbs or flowers at home. It is a great space utilization idea. The idea is pretty simple and flexible. You just stack some pots together to make a tower. You can modify the idea to fit.