| Cultivar | Hybridizer | Year | Ht. | Sz | Season | Re | Fol. | Fr | Spd | tet | Color | Mark | Price | Remarks |
| Nashville | Claar | 1951 | 39 | M | dor | yellow | markings | dsp | ||||||
| National Dancing Eye | Lovell | 2007 | 22 | 5 | M | y | dor | t | cream | red-purple eye | dsp | |||
| Navajo Blanket | Grantham | 1968 | 30 | 8.5 | M | dor | y | yellow | dark eye | 6 | ||||
| Navajo Pottery | unreg | M | dor | unr | gold | brick red eye | 5 | |||||||
| Nectarine | Nesmith | 1951 | 50 | M | dor | yellow-orange | dsp | |||||||
| Netherfield | Ware | 1998 | 28 | 6 | E | y | dor | yellow polychrome | slight eye | 20 | has bloomed June to Oct | |||
| New Vista | Wild | 1969 | 30 | 6 | ML | dor | pink | 5 | ||||||
| Newberry Bright Moon | Rushing | 1989 | 24 | 7 | EM | dor | y | t | yellow | 10 | ||||
| Newberry Echo | Rushing | 1987 | 20 | 9 | E | y | dor | y | yellow | 8 | ||||
| Newberry Festival | Rushing | 1987 | 25 | 7 | EM | dor | y | rose | 6 | |||||
| Newberry Frilly Lady | Rushing | 1987 | 20 | 6 | EM | dor | y | t | yellow | 8 | ||||
| Newberry Real Frills | Rushing | 1985 | 20 | 5.5 | EM | dor | y | t | yellow | 8 | ||||
| Neyron Rose | Kraus | 1950 | 30 | M | dor | light red with marks | dsp | |||||||
| Nice Touch | Apps | 1987 | 25 | 4.5 | E | ev | y | yellow-peach | dark eye | 10 | ||||
| Night Beacon | Hansen | 1988 | 27 | 4 | EM | y | ev | purple | 6 | |||||
| Nile Plum | Munson RW | 1984 | 20 | 5 | EM | y | ev | t | plum | red eye | 6 | |||
| Nina Winegar | Bechtold | 1949 | 30 | M | dor | va | light orange | 5 | ||||||
| No Nonsense | Gates L | 1976 | 28 | 6.5 | EM | y | s-ev | y | t | orange polychrome | 6 | powerful bloomer | ||
| Nob Hill | Hall D | 1963 | 36 | EM | dor | light pink blend | 5 | A.M. | ||||||
| Noemi | Ware | 1996 | 29 | 5.5 | M | dor | t | red bitone | 30 | |||||
| North Wind Drifter | Schaben | 2001 | 44 | 8.5 | M | dor | uf | lavender pink | white edge | dsp | ||||
| Northbrook Star | Fay | 1968 | 29 | 6.5 | ML | dor | t | yellow | 6 | |||||
| Not Without Merritt | Tankesley-Cl | 1997 | 36 | 4.5 | M | s-ev | yellow buff | stippled rose | 30 | |||||
| Novelty Number | Lambert | 1966 | 28 | 5 | M | dor | yellow | red eye | 5 | |||||
| Nutmeg Elf | McCabe | 1978 | 28 | 3 | EM | dor | va | yellow | 6 | cute, excellent bloomer | ||||
| Ogeechee Moon | Taylor J | 1976 | 30 | 9 | M | ev | light pastel blend | 6 | ||||||
| Olallie Kevin | Darrow | 1977 | 24 | 5.5 | M | dor | t | red | yellow halo | 10 | ||||
| Olallie Red | Darrow | 1974 | 34 | 6.3 | ML | dor | t | red | darker halo | dsp | ||||
| Old-Fashioned Maiden | Couturier G | 1993 | 35 | 6 | M | dor | y | light red-orange | darker eye | 12 | ||||
| Olive Bailey Langdon | Munson RW | 1974 | 28 | 5 | EM | y | s-ev | t | purple | 6 | Lenington Award | |||
| Olive's Odd One | Pauley O | 1991 | 40 | 6 | M | y | dor | red | red halo | 8 | it is odd, but intriguing | |||
| Olivier Monette | Monette | 1973 | 22 | 6 | EM | y | ev | purple | 8 | |||||
| On Display | Herr | 1996 | 30 | 5.5 | E | dor | y | burgundy | yellow eye | dsp | ||||
| On Fire | Peck | 1975 | 30 | 6 | EM | dor | t | red | 8 | |||||
| One Step Beyond | Benz | 1995 | 32 | 6.5 | M | s-ev | y | t | lavender rose | 12 | ||||
| Ono | Johnson | 1977 | 18 | 4.4 | EM | ev | y | light yellow | 5 | taller here | ||||
| Open Hearth | Lambert | 1976 | 26 | 9 | M | dor | red | ruby halo | 6 | |||||
| Ophir | Farr | 1924 | 50 | M | y | s-ev | y | light orange yellow | 10 | historic | ||||
| Orange Beauty | Sass HP | 1945 | 40 | M | dor | y | yellow-orange | dsp | ||||||
| Orange Glow | Barr | 1918 | 36 | EM | dor | light orange | 8 | historic | ||||||
| Orange Velvet | Joiner J | 1988 | 30 | 6.5 | M | y | s-ev | orange | 10 | one of the all-time best | ||||
| Orangeburg | Blakely | 1970 | 34 | 8 | L | dor | gold | 10 | ||||||
| Orangeman | Yeld | 1906 | 24 | EE | y | dor | orange | 6 | stunning early display | |||||
| Orangutan | Reed | 1991 | 26 | 6 | E | y | dor | orange | darker eye | 25 | ||||
| Orchid Corsage | Saxton | 1975 | 32 | 7.5 | ML | y | dor | y | pink | 8 | ||||
| Oriental Influence | Wild | 1969 | 34 | 6 | M | dor | yellow-lavender blend | 5 | ||||||
| Oriental Ruby | Fischer HA | 1968 | 34 | 6 | ML | dor | red | dsp | ||||||
| Ostrich Plume | Fass | 1962 | 36 | M | dor | y | yellow-green | 8 | ||||||
| Over The Edge | Salter J | 1992 | 20 | 5.5 | ML | s-ev | t | lavender blend | 10 |