Echeveria fimbriata (shown above) has an upright, rosette form with leaves that often turn purplish-green. You can expect it to bloom in late summer with red and orange flowers.
E. elegans (pictured at right) is a popular species. It has a beautiful rosette form with tall spikes of bell-shaped blooms on pink stems appearing in summer. Pinch them off when flowers have faded.
Countless varieties are available to choose from. Choose any you like -- they're all easy to grow.
Several species look spectacular in a dish garden growing together, or combined with other succulents.
Trying to identify echeveria? Start with this echeveria list of pictures with species names. You'll discover lots of