The USDA hardiness zone rating of the various ornamental grasses is based upon the latest research available from the University of Minnesota Extension Publication # 573 and American Ornametals Perennials:
     
     
    USDA Zone 3
    Carex grayi
    Bouteloua gracilis
    Bromus inermis 'Skinners Gold'
    Juncus effusus
    Leymus arenarius
    Typha latifolia
     
     
    USDA Zone 4
    Alopecurus pratensis 'Aureovariegatus' ('Variegatus')
    Andropogon gerardii
    Arrhenatherum bulbosum 'Variegatum'
    Bouteloua curtipendula
    Calamagrostis acutiflora 'Karl Foerster'
    Calamagrostis acutiflora 'Overdam'
    Calamagrostis acutiflora 'Stricta'
    Calamagrostis brachytricha
    Carex aurea
    Carex flacca (glauca)
    Carex muskingumensis
    Carex nigra
    Carex nigra 'Variegata'
    Carex speciosa 'Velebit Humilis'
    Danthonia californica
    Deschampsia cespitosa
    Deschampsia cespitosa 'Bronzeschleier'
    Deschampsia cespitosa 'Goldgehange'
    Deschampsia cespitosa 'Goldschleier'
    Deschampsia cespitosa 'Tautrager'
    Elymus glaucus
    Fargesia nitida
    Festuca amethystina
    Festuca glauca 'Blauglut'
    Festuca glauca 'Fruehlingsblau'
    Festuca glauca 'Meerblau'
    Festuca idahohensis
    Festuca rubra
    Hakonechloa macra
    Helictotrichon sempervirens
    Hierochloe odorata
    Juncus effusus 'Spiralis'
    Koeleria pyramidata (cristata)
    Leymus racemosus 'Glaucus'
    Luzula sylvatica
    Miscanthus floridulus
    Miscanthus sinensis 'Silberfeder'
    Miscanthus sinensis purpurascens
    Molinia arundinacea 'Skyracer'
    Molinia arundinacea 'Windspiel'
    Oryzopsis hymenoides
    Panicum virgatum
    Panicum virgatum 'Heavy Metal'
    Panicum virgatum 'Rehbraun'
    Panicum virgatum 'Rotstrahlbusch'
    Phalaris arundinacea 'Feesey'
    Phalaris arundinacea 'Picta'
    Schizachyrium scoparium (Andropogon)
    Sesleria nitida
    Sorghastrum nutans (avenaceum)
    Sorghastrum nutans 'Sioux Blue'
    partina pectinata 'Aureomarginata'
    Spodiopogon sibiricus
    Sporobolus heterolepsis
    Themeda triandra 'Japonica'
    Typha laxmannii
    Typha minima
     
     
    USDA Zone 5
    Arundo donax
    Briza media
    Carex conica 'Snowline'
    Carex elata 'Aurea' (Bowles' Golden)
    Carex morrowii 'Aureovariegata'
    Carex morrowii 'Variegata'
    Carex pseudo-cyperus
    Carex remota
    Carex sylvatica
    Chasmanthium latifolium
    Deschampsia cespitosa 'Northern Lights'
    Deschampsia flexuosa 'Tatra Gold'
    Elymus magellanicus
    Equisetum scirpoides
    Eragrostis trichodes
    Eriophorum spp. 'Spring Snow'
    Festuca occidentalis
    Hakonechloa macra 'Aureola'
    Holcus mollis 'Albovariegatus'
    Glyceria maxima 'Variegata'
    Imperata 'Red Baron'
    Koeleria glauca
    Luzula alpinopilosa
    Luzula luzuloides
    Luzula nivea
    Luzula sylvatica 'Tauern Pass'
    Melica altissima atropurpurea
    Melica ciliata
    Melica speciosa
    Miscanthus sinensis
    Miscanthus sinensis 'Arabesque'
    Miscanthus sinensis 'Goldfeder'
    Miscanthus sinensis 'Gracillimus'
    Miscanthus sinensis 'Graziella'
    Miscanthus sinensis 'Kirk Alexander'
    Miscanthus sinensis 'Malepartus'
    Miscanthus sinensis 'Morning Light'
    Miscanthus sinensis 'Punktchen'
    Miscanthus sinensis 'Sarabande'
    Miscanthus sinensis 'Silberpfeil'
    Miscanthus sinensis 'Strictus'
    Miscanthus sinensis 'Variegatus'
    Miscanthus sinensis 'Zebrinus'
    Miscanthus sinensis condensatus
    Molinia caerulea
    Molinia caerulea 'Moorflamme'
    Molinia caerulea 'Strahlenquelle'
    Molinia caerulea 'Variegata'
    Pennisetum alopecuroides
    Pennisetum alopecuroides 'Hameln'
    Pennisetum orientale
    Phragmites australis 'Variegatus'
    Poa chaixii
    Sesleria autumnalis
    Stipa gigantea
    Stipa pennata
     
    USDA Zone 6
    Acorus gramineus 'Argenteostriatus'(Variegatus)
    Acorus gramineus 'Ogon'
    Arundo donax 'Versicolor' ('Variegata')
    Carex buchananii
    Carex dolichostachya 'Gold Fountains'
    Carex pendula
    Carex petriei
    Equisetum hyemale
    Festuca mairei
    Millium effusum 'Aureum'
    Miscanthus sinensis 'Kleine Fontane'
    Miscanthus sinensis 'Yaku Jima'
    Miscanthus transmorissonensis
    Pennisetum alopecuroides 'Little Bunny'
    Pennisetum alopecuroides 'Moudry'
    Saccharum ravennae (Erianthus)
    Stipa capillata
     
    USDA Zone 7
    Carex buchananii viridis
    Carex comans 'Frosted Curls'
    Carex comans 'Bronze Form'
    Carex ornithopoda 'Variegata'
    Carex testacea
    Cortaderia selloana
    Cortaderia selloana 'Rosea'
    Miscanthus sinensis 'Adagio'
    Miscanthus sinensis 'Cabaret'
    Miscanthus sinensis 'Cosmopolitan'
    Stipa tenuissima
     
    USDA Zone 8
    Cortaderia richardii
     
    USDA Zone 9
    Rychelytrum neriglume
    Pennisetum setaceum 'Burgundy Giant'
    Pennisetum setaceum 'Rubrum'
    Pennisetum setaceum 'Rubrum Dwarf'
     

    back in frame