I have been wanting some prisms too.
The ones that I really want are,
Daylily (Hemerocallis 'Emerald Prism')
Daylily (Hemerocallis 'Garnet Prism')
Daylily (Hemerocallis 'Pirate's Prism')
Daylily (Hemerocallis 'Applique Prism')
Daylily (Hemerocallis 'Amethyst Prism')
Navajo Princess did great, but one spring it died. I need to replace it...
I've had Malachite Prism for about 4-5 years, never has bloomed well and hasn't increased.
Someone told me they've had Malachite Prism since it came out in 1999 and it hasn't increased!
Not really much help though...
