Primroses (Primula sp.) in all their diverse forms are woefully underplanted in high-altitude gardens. This may be due to gardeners buying "bedding" Primroses in spring that perform as annuals and do not return the following year. Those Primroses have been especially bred for their early, showy blossoms and are not normally perennial. But most of the other, lesser-known Primroses are!
In this small, artifical bog garden there are 5 different Primroses. From left to right, light yellow Stemless Primrose (P. acaulis), rose and white ball-headed Drumstick Primrose (P. denticulata), white Polyantha Primrose (P. x polyantha), yellow and pink and red and yellow Oxlip (P. elatior) and behind that multicolored group, the small, reddish-purple Wands Primrose ((P. 'Wanda Supreme').
Primroses are easy to grow. In my cool-summer, high-altitude climate, they thrive in full sun as long as they have cool, moist soil. I have created artificial bog gardens in several areas for these and other outstanding bog plants.
But my Primroses will also grow beautifully in rock crevices on east- or north-facing walls. All they require in these locations is enough room for their ever-expanding roots.
They do not like hot, dry locations and will "go flat" during the hottest part of the day.