| Medium Size Hostas | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Nagaba Musashino' | Med-Green | | - | Unknown | Light-Purple | August to September | Unknown | --NR-- |
| 'Nagaeto' | Light-Green | | - | Unknown | Light-Purple | - | Ruh, Peter & Jean | .2010 .2018 |
| 'Nakafu Kiyosumi' | Light-Green | | - | Nat-Sport | Pale-Lavender | July | Unknown | --NR-- |
| 'Naked Lady' | Med-Green | Marginal | White | TC Sport | Med-Lavender | July | Anderson, Jim | --NR-- |
| 'Nameoki' | Med-Green | | - | Unknown | - | - | Hensen, Karel | --NR-- |
| 'Namichidori' | Med-Green | | - | Unknown | Light-Purple | August | Unknown | --NR-- |
| 'Nantucket' | Dark-Green | Streaked | Yellow | Unknown | - | - | Goodenough, Rick | --NR-- |
| 'Napoleon' | Dark-Green | Marginal | Yellow | Nat-Sport | Light-Purple | July into August | Malloy, Alex | --NR-- |
| 'Naseweiss' | Med-Green | | - | Unknown | Near-White | - | Kohlein, Fritz | --NR-- |
| 'Nasu Nishiki' | Med-Green | Streaked | Yellow | Unknown | - | - | Tanaka, Katsuyoshi | --NR-- |
| 'Nasu-no-haru' | Dark-Green | Marginal | White | Unknown | - | - | Unknown | --NR-- |
| 'National Velvet' | Dark-Green | | - | Nat-Sport | Med-Lavender | August | Kuk, Bob | .1990 |
| 'Neat Splash' | Med-Green | Marginal | White | Hybrid | Light-Purple | July into August | Aden, Paul | .1978 |
| 'Neat Splash Fleck' | Med-Green | Streaked | Speckles | Nat-Sport | Light-Purple | July into August | Powell, Loleta | --NR-- |
| 'Neat Splash Rim' | Blue/Green | Marginal | Yellow | Nat-Sport | Light-Purple | July into August | AHS | .1986 |
| 'Neelix' | Dark-Green | | - | Unknown | - | - | Dupre, Dirk | --NR-- |
| 'Nefertiti' | Yellow | Marginal | Dark Green | Nat-Sport | Near-White | June into July | Hansen, Hans | .2003 |
| 'Nello and Patrasche' | Med-Green | | - | Hybrid | - | August to September | Philips, Hugo | .2010 |
| 'Nemesis' | Dark-Green | Medial | Yellow | Unknown | - | July into August | Dupre, Dirk | .2010 |
| 'Netta Statham' | Med-Green | Medial | Yellow | Nat-Sport | Light-Purple | July | Unknown | --NR-- |
| 'New Wave' | Med-Green | | - | Hybrid | Pale-Lavender | July | Lohman, Doug & Zilis, Mark | .1988 |
| 'Newberry Gold' | Yellow | | - | Hybrid | Near-White | June | Plemmons, Chuck | .1996 |
| 'Nezperce' | Light-Green | | - | Unknown | - | - | Wade, Van | --NR-- |
| 'Nicholas James' | Yellow | | - | Unknown | Pure-White | June | Banyai, Pauline & Elslager, Ed | .1999 |
| 'Nick Balash' | Dark-Green | | - | Unknown | Light-Purple | July into August | Owens, Clarence | .1994 |
| 'Nickelodeon' | Med-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | August | Schmid, Tom | .1998 |
| 'Nicola' | Med-Green | | - | Hybrid | Light-Purple | August | Eason, Alan | .1984 |
| 'Night Flight' | Blue/Green | | - | Hybrid | Med-Lavender | August | Dean, Don | .2015 |
| 'Night Music' | Blue/Green | | - | Unknown | - | June into July | Ward, Dr Dick & Jane | .2009 |
| 'Night Shades' | Dark-Green | Streaked | Yellow | Nat-Sport | Light-Purple | July | Snyder, Ron | .2000 |
| 'Nightlife' | Blue/Green | | - | Hybrid | Light-Purple | July | Zilis, Mark | .2004 |
| 'Nikazaki Mizu' | Med-Green | | - | Nat-Sport | Light-Purple | - | Unknown | --NR-- |
| 'Nina Smiles' | Light-Green | | - | Unknown | - | - | Unknown | --NR-- |
| 'Nippers' | Dark-Green | | - | Hybrid | Pale-Lavender | July | Goodenough, Rick | .2006 |
| 'Nirajunah' | Yellow | | - | Unknown | - | - | Wade, Van | --NR-- |
| 'Nirvana' | Med-Green | Marginal | Yellow | Unknown | - | - | Unknown | --NR-- |
| 'Nishi Neko' | Med-Green | Streaked | White | Unknown | - | - | Unknown | --NR-- |
| 'Nishiki Akikaze' | Med-Green | Marginal | White | Nat-Sport | Light-Purple | August | Klose, Heinz | --NR-- |
| 'No Frills' | Blue/Green | | - | Hybrid | Near-White | July | Simpers, Lucille & Ruh, Peter | .1991 |
| 'Nobility' | Blue/Green | Medial | White | Nat-Sport | Near-White | June into July | Walters Gardens | .2000 |
| 'Nooner' | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July | Benedict, Dr Ralph (Herb) | .1991 |
| 'Nor’easter' | Med-Green | Medial | White | Unknown | - | - | Sawyer, Rick | --NR-- |
| 'Nordatlantik' | Blue/Green | | - | Hybrid | Pale-Lavender | July | Smith, Eric & Ruh, Peter | .1997 |
| 'Nordic Racer' | Med-Green | Marginal | White | Hybrid | Light-Purple | July into August | Olson, Dr Robert | .1999 |
| 'Norma' | Med-Green | Marginal | Yellow | Nat-Sport | Light-Purple | July into August | Bond, Norma | --NR-- |
| 'North Point' | Blue/Green | | - | Unknown | - | - | Lydell, Ransom | .1998 |
| 'North Star' | Med-Green | Marginal | White | Unknown | - | - | Unknown | --NR-- |
| 'North Wind' | Dark-Green | Marginal | White | Nat-Sport | - | July into August | Wilson, Chris | .2008 |
| 'Northern Beauty' | Med-Green | Marginal | White | Unknown | - | - | Unknown | --NR-- |
| 'Northern Heritage' | Dark-Green | Streaked | Speckles | Hybrid | Near-White | June into July | Dean, Don | .1999 |
| 'Northern Iowa Wrestling' | Med-Green | Streaked | White | Unknown | - | June into July | Freeman, Franc | .2012 |
| 'Northern Lights' | Blue/Green | Medial | Creamy White | Nat-Sport | Near-White | June into July | Walters Gardens | .1984 |
| 'Northern Star' | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | Walters Gardens | .1993 |
| 'Northwest Textures' | Blue/Green | | - | Unknown | Near-White | June into July | Draper, Glen | --NR-- |
| 'Northwind' | Med-Green | Medial | White | Nat-Sport | Pale-Lavender | July into August | Hawes, James | --NR-- |
| 'Norwalk Chartreuse' | Yellow | | - | Unknown | Light-Purple | July | Stark, Gunther | .1995 |
| 'Not So' | Dark-Green | Medial | Yellow | Nat-Sport | Pale-Lavender | June into July | Purtymun, Charles & Walek, Kevin | .2009 |
| 'Now' | Dark-Green | Medial | Yellow | Unknown | - | - | Benedict, Dr R. (Herb) & Dorothy & Kuenster, Rod | .2010 |
| 'Now and Then' | Med-Green | Streaked | Yellow | Unknown | - | - | Benedict, Dr R. (Herb) & Dorothy & Kuenster, Rod | .2010 |
| 'Nuestra Señora de Atocha' | Yellow | | - | Hybrid | Pale-Lavender | June into July | Goodwin, Randy | .2009 |
| 'Nuked' | Dark-Green | | - | Unknown | Pale-Lavender | - | Williams, Glenn | --NR-- |
| 'Number Nine' | Blue/Green | | - | Unknown | - | June into July | Ragus, Gerhard & Renate | .2015 |
| 'Nutty Professor' | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July | Klehm, Roy | .2004 |
| 'Nyikos' | Blue/Green | | - | Unknown | - | - | Unknown | --NR-- |
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