Bugleweed

Ajuga reptans, bugleweed, is a fail proof groundcover for any sun exposure or soil type. I started with its Latin name because I always thought it sounded more patrician and better suited to this plants' sophistication.
I love bugleweed, it is a versatile plant which helped me bring back to life several locations with dry shade where few other plants thrive. It tends to get invasive when it has full sun exposure and rich soil.
The plant blooms freely for almost two months mid-spring, with delicate spears of lavender-blue flowers. It is especially vibrant in full sun to part shade conditions, but it will flower freely in the shade too, if only a little later.
It forms dense patches of thick foliage that stay low to the ground and turn charming shades of purple and copper when the weather gets hot and dry. The plant is beautiful all year round, and it protects its territory fiercely: there are no weeds in a bugleweed patch, it won't allow them access to the light.
Bugleweed spreads quickly, which makes it very useful as a fast groundcover, but is not difficult to uproot, if you want to tame its enthusiastic growth or move it somewhere else.
It tolerates drought, sub-zero temperatures, poor soils, shade, heavy clay, crowding, neglect, and it is pretty too. Should I say more?