Hardy succulents can tolerate freezing temperatures down to 20-25 degrees Fahrenheit(Zone 5), or lower. Popular hardy succulents include: Sepervivums(hen and chicks), Queen Victoria Agave, Pink Ice Plants, Parry's Agave, etc. Unlike soft succulents, they thrive and shine in winter,which makes them as great additions to rock succulent garden and grounded succulent garden.