This is what is in the perennial garden.

Acer Ginnala

Acer Rubrun 'Red Sunset"

Achellea 'Moonshine'

Agapanthus

Ajuga reptans"Catlin's Giant"

Allium giganteum

Allium spherocephalon

Allium unifolium

Anemone x Hybrids

Anemone x Hybrids ' Honorine Jobert'

Apple

Aquilegia vulgaris 'Variegata'

Artemisa 'Canescens"

Artemisia 'Powis Castle'

Aster divaricatus

Aster ericoides

Aster nova - belgii 'Rose Serenade'

Aster puniceus

Aster x frikartii 'Monarch'

Astible 'Ostrich Plume'

Calamagrostis 'Karl Foester'

CIstus x Corbariensis

Citus x Purpuressm

Clematis 'Etoile Violette'

Coreopsis "moonbeam'

Coreopsis Rosea

Cornus Kousa

Cornus Mas

Corydalis Lutea

Crocus

Daphne Cneorum

Delphinium 

Dianthus Plumarius

Digitalis Grandiflora

Echinops 'Taplow Blue'

Euonymus Radicans

Euphorbia Griffith 'Fireglow

Euphorbia Polychroma

Euphorbia Robbiae

Euphorbia Stricta

Euphorbia x Martinii

Euphorbia x Martinii Red Martin

Filipendula Rubra 'Venusta'

Forsythia 'Lynwood Gold'

Fragaria "pink Panda'

Fritillaria imperialis

Fushsia

Fushsia Magellanica 

Geranium 'Johnson's Blue'

Geranium Macrorhizum

Geranium Psilostemon

Geranium x oxonianum 'Claridge Druce'

Geranium x oxonianum 'Rebecca Moss'

Geranium x oxonianum 'Southcombe Star'

Geranium x oxonianum 'Thurstonianum'

Geranium x Riversleaianum 'Mavis Simpson'

Geranium xoxonianum 'Phoebe Noble'

Geum 'Leonars's Varety'

Hamamelis x Intermedia 'Arnold Promise'

Helleborus Orientalis

Hemerocallis "Stella Doro"

Heuchera Sanguinea Vars.

Heucherella 'Bridget bloom'

Hibiscus Syriacus 'Diana'

Hosta 'Piedmont Gold'

Hosta sieboldiana 'Elegans'

Hydrangea Auercifolia

Hydrangea mac. var. mac. 'Europa'

Iris Ensata 

Iris, Pacific Coast

Lavandula Latifolia

Lavandula Stoechas

Lavetera 'Kew Rose'

Lobelia tupa

Lysichitio camtschatense

Lysichiton Americanum

Lysimachia Ephemerum

Muscari armeniacum

Narcissus bulocodium conspicuus

Narcissus cyclamineus 'February Gold'

Narcissus King Alfred

Nereta 'Six Hills Giant'

Organum 'Hopleys Purple'

Origanum vulgare 'Hopleys'

Peach 'Frost'

Penstemon 'Blue of Zurich'

Perovskia Hybrida

Phlox Maculata 'Miss Lindgard'

Phlox Maculata 'Rosalind'

Plum 'Satsumus'

Plum 'Shiro'

Polygonum Bistorta 'Superba'

Polygonum Campanulatum

Potentilla Fruticosa 'Mt. Everest'

Ribes Sangvinea 'Henry Henneman'

Rosemary Blue Spire

Rudbeckia Lacinata 'Herbstonne'

Salix Alba 'Chermisina'

Salix Babylonica

Salix Purpurea 'Nana'

Salvia 'Indigo Spires'

Salvia 'Superba'

Salvia Azurea 'Pitcheri'

Salvia Officinalis 'Purpurascens'

Salvia Officinals 'Tricolor'

Senecio 'Sunshine'

Sidalcea Hybrids

Stachys Lanata

Stachys Lanta 'Silver Carpet'

Verbena Bonariensis

Veronica Incana

Viburnum 'Spring Bouquet'

I have these plants, but I need to fine the theme garden.

Acanthus mollis

Aconitum Carmichaelii

Akebia

Alcea rosea'Nigra'

Alchemilla Mollis

Aresarum proboscideum

Armeria pseudarmeria

Arrhenatherum bulbsum 'Variegatum'

Arum italicum

Aruncus dioicus

Asiatic hybrid lilies

Astrantia Major

Betula Jacquemontii

Blechnum Pinna - Marina

Butomos umbellatus

Caltha Polypetala

Cardamine  trifolia

Cardamine pratensis 'Flore Pleno' P

Carypteris 'Longwood Blue'

Catananche caeruleum (carpet)

Centranthus ruber 'Alba;

Cephalaria gigantea

Cerastium Tomentosum, Endymion Hispanicum

Cercidiphyullum Japonicum

Cimicifuga simples'Atropurpurea'

Clerodendron Trichotmum

Clethra Alnifolia

Crambe Cordifolia

Cynara Scolymus

Cypripedium calceolus

Cyrtomium Falcatum

Cytisus Battandieri

Diascia 'Blackthorn Apricot'

Diascia Vigilis

Dierama pulcherrima

Dryopteris wallichiana

Elymus cinereus

Eranthis hyemalis

Eryngium Planum

Escallonia 'Apple Blossom'

Euonymus Japonicus "silver Queen'

Foeniculum Vulgare 'Purpurascens'

Galanthus nivalis

Galtonia princeps

Galtonia virdiflora

Gaura Lindheimeri

Halimiocistus x Sahucii

Helianthemum Nummularium

Helictotrichon Sempervirens

Hypericumx Inodorum 'Elstead'

Itea Chinesis

Jasminum Nudiflorum

Kerria Japonica 'Picta'

Knautia macedonica

Laburn x Vossii

Lathyrus Latifolius

Leucothoe

Lonicera Periclymenum 'Serotina'

Lysimachia Nummularia

Macleya microcarpa 'Coral Plume'

Magnolia Stellata

Matteuccia Struthiopteris

Melianthus major

Mimulus cardinallis 'Aurantiasus'

Miscanthus Sinensis 'Gracilimus'

Ompahalodes cappadocica

Osmanthus Delavayi

Osmanthus Heterophyllus

Philadelphus x Virginalis 'Minnesota Snowflake'

Polemonium Caeruleum

Pontaderia Cordata

Prunus Serrulata ' Amanogawa'

Prunus x Cistena

Prunus Yedoensis 'Akebono'

Pyracantha 'Goldrush'

Rodgersia

Romneya Coulteri

Rumex Hydrolapathum

Ruta Graveolens

Sambucus Nigra 'Variegata'

Saponaria Ocymoides

Scilla campanulata

Scobiosa Caucasis Prefer' Fama'

Stipa Gigantea

Styrax Japonica

Syringa Vulgaris Var.

Teucrium Chamaedroides

Thalictrum 'Hewitt's double'

Vaccinium Paryifolium

Veronicastrum Virginicum

Viburnum Plicatum 'Summer Snowflake'

Viburnum x Bodnantense 'Dawn'

Viola Cornuta 'Maggie Mott'

Viola Odorata

Weigela Florida 'Variegata'