This grey-leaved and beautifully patterned stonecrop grows the fastest of any Sedum species in our gardens.  The leaves are a bit more chalky and less palatable than the others, though.

These native succulents grow on moist rocky cliffs along the coast, in the foothills of the Willamette Valley, and upwards to the mid-elevation Cascades.  They are drought tolerant, prefer full sun, and need very little soil to survive.  They are popular to in plantings on green roofs for those reasons.  The small yellow flowers bloom in late summer and the leaves are edible, though some are better than others.