Just scrolled through - a lot of beauties here in the 'N-section'.
I can add some more:
Nano Probe - reblooming Mini - very prolific bloomer, half of the time double here in my garden
Nefertiti - this plant needs no name tag
New Direction - very good late here
Night Wings - the blackest near black here
Nob Hill - always late even if the registration data says early midseason (combined with August Orange)
Noria - hard to describe, really distinctive, a masterpiece
North Wind Dancer - beautiful but a leaner
Nova Lavender VT (not registered, from Olallie) - reliable northern rebloomer, sometimes until Halloween
Nutmeg Elf - really cute