This little Crassula is very low growing and is drought resistant and will withstand a light frost. It grows best in semi shade or shade and would be idea in a rockery or a hanging basket. The flowers open in summer. This is the larval host plant for the Tailed Black-eye butterfly. Named from the Latin 'crassus'= and 'ula'= diminutive referring to the fleshy succulent leaves. The word 'nana' means dwarf or small.