| Cultivar Name | Source | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Registered |
| 'Nathan Nirvana' | Asch, Stuart | Large | Dark-Green | Marginal | White | Hybrid | Pale-Lavender | July into August | .2003 |
| 'Neeta' | Owens, Clarence | Large | Med-Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | .1999 |
| 'Nicholas James' | Banyai, Pauline & Elslager, Ed | Medium | Yellow | - | - | Unknown | Pure-White | June | .1999 |
| 'Nick Balash' | Owens, Clarence | Medium | Dark-Green | - | - | Unknown | Light-Purple | July into August | .1994 |
| 'Nickelodeon' | Schmid, Tom | Medium | Med-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | August | .1998 |
| 'Nifty Fifty' | Benedict, Dr Ralph (Herb) | Large | Dark-Green | Marginal | Yellow | Nat-Sport | Near-White | June | .1986 |
| 'Nobility' | Walters Gardens | Medium | Blue/Green | Medial | White | Nat-Sport | Near-White | June into July | .2000 |
| 'Noble Eagle' | Elslager, Ed | Giant | Dark-Green | Streaked | Yellow | Hybrid | Pale-Lavender | July | .2004 |
| 'Noel' | Benedict, Dr Ralph (Herb) | Small | Blue/Green | Marginal | White | Nat-Sport | Deep-Purple | July into August | .1983 |
| 'None Lovelier' | Elslager, Ed | Large | Med-Green | Marginal | White | Hybrid | - | - | .2003 |
| 'Nooner' | Benedict, Dr Ralph (Herb) | Medium | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July | .1991 |
| 'North Wind' | Wilson, Chris | Medium | Dark-Green | Marginal | White | Nat-Sport | - | July into August | .2008 |
| 'Northern Comet' | Walters Gardens | Large | Blue/Green | Medial | White | Nat-Sport | Near-White | June into July | --NR-- |
| 'Northern Exposure' | Walters Gardens | Giant | Blue/Green | Marginal | Greenish White | Nat-Sport | Near-White | June into July | .1997 |
| 'Northern Halo' | Walters Gardens | Large | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | .1984 |
| 'Northern Lights' | Walters Gardens | Medium | Blue/Green | Medial | Creamy White | Nat-Sport | Near-White | June into July | .1984 |
| 'Northern Mist' | Falstad, C.H | Large | Blue/Green | Medial | White | TC Sport | Near-White | June | .1988 |
| 'Northern Mystery' | Falstad, C.H & Walek, Kevin | Large | Blue/Green | Medial | White | Nat-Sport | Near-White | June into July | .2009 |
| 'Northern Star' | Walters Gardens | Medium | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | .1993 |
| 'Northern Sunray' | Walters Gardens | Large | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | .1987 |
| 'Now' | Benedict, Dr R. (Herb) & Dorothy & Kuenster, Rod | Medium | Dark-Green | Medial | Yellow | Unknown | - | - | .2010 |
| 'Now and Then' | Benedict, Dr R. (Herb) & Dorothy & Kuenster, Rod | Medium | Med-Green | Streaked | Yellow | Unknown | - | - | .2010 |
| 'Nuki Girl' | Schmidt, Bevie | Large | Blue/Green | - | - | Unknown | - | July into August | .2009 |
| 'NYPD Blue' | Elslager, Ed | Large | Blue/Green | Marginal | Yellow | Hybrid | Pale-Lavender | July into August | .2004 |
| 'Razz'n Rick' | Schmidt, Bevie | Large | Med-Green | Streaked | Yellow | Unknown | - | August to September | .2009 |
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