H. nakaiana 'Nakaimo' 'Nancy Gill' 'Nancy Minks' 'Nate the Great' 'Neat and Tidy' 'Naugoku Hort' 'Neat Splash' 'Neat Splash Rim' 'Needlepoint' 'Needle's Eye' 'Neon Glory' 'Neptune' 'Newberry Gold' 'Niagara Falls' 'Nifty Fifty' 'Night before Christmas' 'Night Flight' H. nigrescens 'Noah's Ark' 'None Lovelier' 'Nooner' 'Northern Exposure' 'Northern Halo' 'Northern Heritage' 'Northern Lights' 'Northern Mist' 'Northern Mystery' 'Norwalk Chartreuse' 'Nougat' 'Now and Then'