Knoll Gardens - Specialist Grower of Grasses and Perennials

Perennials
Genera	Species / Cultivar	Plants Per Square Metre
Achillea		3 to 5
Agapanthus		3 to 5
Agastache		3 to 5
Anemone		3 to 5
Angelica		1 to 3
Anthemis		3 to 5
Arctanthemum		5 to 7
Artemisia		3 to 5
Asphodeline		3 to 5
Aster		3 to 5
Astilbe	chinensis pumila	5 to 7
Astilbe	Purpurlanze	3 to 5
Astrantia	Buckland	5 to 7
Bergenia		5 to 7
Beschorneria		1 to 3
Bidens	Hannays Lemon Drop	1 to 3
Bidens	heterophylla	3 to 5
Centranthus		3 to 7
Cephalaria		1 to 3
Ceratostigma		5 to 7
Cirsium		3 to 5
Crocosmia	Emberglow	5 to 7
Crocosmia	Lucifer	3 to 5
Crocosmia	Zambesii	3 to 5
Dianthus		5 to 7
Dierama		3 to 5
Echinacea		5 to 7
Echinops	ritro	3 to 5
Erigeron		5 to 7
Eryngium		3 to 5
Eucomis		3 to 5
Eupatorium	except where stated	1 to 3
Eupatorium	Chocolate	3 to 5
Eupatorium	lindleyanum	3 to 5
Euphorbia	except where stated	3 to 5
Euphorbia	mellifera	1 to 3
Euphorbia	wulfenii	1 to 3
Fascicularia		3 to 5
Filipendula		1 to 3
Foeniculum		3 to 5
Francoa		5 to 7
Gaura		3 to 5
Geranium	except where stated	5 to 7
Geranium	Patricia	3 to 5
Geranium	Rozanne	3 to 5
Geum		5 to 7
Helianthus		1 to 3
Helenium		5 to 7
Heuchera		5 to 7
Inula	magnifica	1 to 3
Inula	orientalis grandiflora	3 to 5
Iris		3 to 5
Knautia		5 to 7
Kniphofia		5 to 7
Leucanthemum		3 to 5
Liatris		3 to 5
Libertia	grandiflora	3 to 5
Libertia	peregrinans	7 to 9
Ligularia		3 to 5
Limonium		5 to 7
Lobelia		5 to 7
Lysimachia		3 to 5
Lythrum		3 to 5
Macleaya		1 to 3
Nepeta	except where stated	3 to 5
Nepeta	sibirica	5 to 7
Papaver		5 to 7
Patrinia		3 to 5
Persicaria	except where stated	3 to 5
Persicaria	amp. Inverleith	5 to 7
Persicaria	polymorpha	1 to 3
Phlomis		3 to 5
Phytostegia		3 to 5
Potentilla	Etna	5 to 7
Rudbeckia	except where stated	3 to 5
Rudbeckia	laciniata	1 to 3
Salvia	except where stated	3 to 5
Salvia	Caradonna	5 to 7
Salvia	patens Royal Blue	5 to 7
Salvia	Purple Volcano	5 to 7
Sanguisorba	except where stated	5 to 7
Sanguisorba	menzeisii	3 to 5
Sanguisorba	officinalis	3 to 5
Sanguisorba	tenuifolia purpurea	3 to 5
Scabiosa	except where stated	5 to 7
Scabiosa	Blue Diamonds	7 to 9
Scabiosa	blue species	3 to 5
Schizostylis		5 to 7
Sedum		3 to 5
Serratula		5 to 7
Sidalcea		3 to 5
Sisyrinchium	Biscutella	7 to 9
Sisyrinchium	Californian Skies	7 to 9
Sisyrinchium	idah. Pale Form	9 to 11
Sisyrinchium	Striatum	5 to 7
Sisyrinchium	Aunt May	5 to 7
Stachys		5 to 7
Symphytum		3 to 5
Thalictrum	Elin	1 to 3
Thalictrum	lucidum	5 to 7
Thalictrum	rochebruneanum	1 to 5
Thalictrum	Thundercloud	1 to 5
Tradescantia		5 to 7
Trifolium		5 to 7
Verbena	bonariensis	3 to 5
Verbena	rigida	5 to 7
Verbena	rigida Polaris	5 to 7
Veronica	gent. Blue Streak	5 to 7
Veronicastrum		3 to 5

Grasses
Genera	Species / Cultivar	Plants Per Square Metre
Acorus		7 to 9
Anemanthele	lessoniana	1 to 3
Andropogon		3 to 5
Ampeledesmos		1 to 3
Arundo		1 to 3
Bothriochloa		3 to 5
Briza		7 to 9
Calamagrostis	except where stated	3 to 5
Calamagrostis	Karl Foerster	1 to 3
Carex	except where stated	3 to 5
Carex	Blue Zinger	5 to 7
Carex	Evergold	5 to 7
Carex	flava	5 to 7
Crex	glauca	5 to 7
Carex	grayi	5 to 7
Carex	Ice Dance	5 to 7
Carex	Japanese Trial Form	5 to 7
Carex	panicea	5 to 7
Carex	pendula	1 to 3
Carex	praegracilis	5 to 7
Carex	secta	3 to 5
Carex	siderosticha variegata	5 to 7
Carex	Sparkler	5 to 7
Chasmanthium		3 to 5
Chondropetalum		3 to 5
Cortaderia		1 to 3
Cyperus	papyrus	1 to 3
Cyperus	ustulatus	1 to 5
Deschampsia		5 to 7
Elymus		3 to 5
Eragrostis		3 to 5
Eriophorum	vaginatum	5 to 7
Festuca	except where stated	5 to 7
Festuca	eskia	7 to 9
Festuca	paniculata	3 to 5
Hakonechloa		5 to 7
Helictotrichon		3 to 5
Hordeum		7 to 9
Hystrix		3 to 5
Imperata		9 to 11
Juncus		3 to 5
Leymus		3 to 5
Liriope		5 to 9
Luzula		5 to 7
Machaerina		5 to 7
Melinis		5 to 7
Milium		5 to 7
Miscanthus	except where stated	1 to 3
Miscanthus	Gold Bar	3 to 5
Miscanthus	Little Kitten	3 to 5
Miscanthus	Little Zebra	3 to 5
Miscanthus	nanus variegatus	3 to 5
Miscanthus	purpurascens	3 to 5
Molinia	except where stated	1 to 3
Molinia	caerulea	3 to 5
Molinia	Edith Dudszus	3 to 5
Molinia	Moorflamme	3 to 5
Molinia	car. Variegata	3 to 5
Muhlenbergia	dumosa	1 to 3
Muhlenbergia	rigens	1 to 5
Nassella	trichotoma	3 to 5
Ophiopogon	variegatus	7 to 9
Ophiopogon	planiscapus	5 to 9
Ohiopogon	planiscapus Minor	9 to 11
Ophiopogon	planiscapus Nigrescens	5 to 9
Oryzopsis		3 to 5
Panicum		3 to 5
Paspalum		1 to 3
Pennisetum		3 to 5
Phalaris		3 to 5
Phormium		1 to 3
Phragmites		3 to 5
Pleioblastus		1 to 3
Poa		3 to 5
Sasa		1 to 3
Schizachyrium		5 to 7
Sorghastrum		5 to 7
Sporobulus		3 to 5
Spodiopogon	sibiricus	3 to 5
Stipa	except where stated	1 to 3
Stipa	grandis	3 to 5
Stipa	tenuissima	3 to 5
Typha	latifolia variegata	3 to 5
Uncinia	Rubra	5 to 7