Dyckia Platinum Silver is the most beautiful silver, landscape worthy Dyckia I have ever seen. At dusk, it seems to almost glow. A single headed plant will attain an 18 inch spread, with clusters getting larger over time. It has bright orange flowers (seen below) on a 3 to 4 foot flower spike. It showed no damage at 16F. It takes a little longer to grow than some of the others, so it costs a little extra.
3 gallon plants are $25
7 gallon plants are $75