Achillea species yarrow H
Actaea japonica baneberry H
Aesculus indica Indian horse chestnut (resistant to leaf-mining moth)T
Aesculus parviflora bottlebrush buckeye S
Agastache species giant hyssop H
Ageratum houstonianum flossflower A
Alcea rosea hollyhock Bi
Allium species ornamental and edibles (when allowed to flower) B
Alstroemeria species Peruvian lily B
Amberboa moschata sweet sultan A
Amsonia tabernaemontana eastern bluestar H
Anchusa azurea large blue alkanet A
Anchusa capensis Cape alkanet A
Angelica archangelica angelica Bi
Angelica gigas purple angelica Bi
Angelica sylvestris Native plant; wild angelica Bi
Anthemis tinctoria dyer’s chamomile H
Antirrhinum majus snapdragon A or H
Aquilegia species columbine H
Arabis allionii Siberian wallflower H
Argemone platyceras crested poppy A or H
Armeria maritima Native plant; thrift H
Aruncus dioicus goat’s beard (male form only) H
Asparagus officinalis common asparagus H
Astrantia major greater masterwort H
Borago officinalis borage A
Brachyglottis (Dunedin Group) ‘Sunshine’ brachyglottis ‘Sunshine’ S
Brachyglottis monroi Monro’s ragwort S
Buddleja davidii butterfly bush S
Buddleja globosa orange ball tree S
Buphthalmum salicifolium yellow ox-eye H
Bupleurum fruticosum shrubby hare’s ear S
Calamintha nepeta Native plant; lesser calamint H
Calendula officinalis common marigold A
Callicarpa bodinieri var. giraldii beautyberry S
Callistephus chinensis China aster A
Calluna vulgaris Native plant; heather S
Campanula carpatica tussock bellflower H
Campanula glomerata Native plant; clustered bellflower H
Campanula lactiflora milky bellflower H
Campanula latifolia Native plant; giant bellflower H
Campanula medium Canterbury bells Bi
Campanula persicifolia peach-leaved bellflower H
Campsis radicans trumpet honeysuckle C
Caryopteris × clandonensis caryopteris S
Catalpa bignonioides Indian bean tree T
Catananche caerulea blue cupidone H
Centaurea atropurpurea purple knapweed H
Centaurea cyanus cornflower * A
Centaurea dealbata mealy centaury H
Centaurea macrocephala giant knapweed H
Centaurea montana perennial cornflower H
Centaurea nigra Native plant; common knapweed H
Centaurea scabiosa Native plant; greater knapweed H
Centranthus ruber red valerian H
Centratherum punctatum Manaos beauty A
Cerinthe major ‘Purpurascens’ honeywort ‘Purpurascens’ A
Cirsium rivulare ‘Atropurpureum’ purple plume thistle H
Clarkia unguiculata butterfly flower A
Clematis vitalba Native plant; old man’s beard, travellers’ joy C
Cleome hassleriana spider flower A
Consolida ajacis giant larkspur A
Convolvulus tricolor dwarf morning glory C/A
Coreopsis species tickseed H or A
Cornus alba red-barked dogwood S
Cosmos bipinnatus cosmea A
Cosmos sulphureus yellow cosmos A
Crambe cordifolia greater sea kale H
Crataegus monogyna Native plant; common hawthorn S or T
Cucurbita pepo marrow, courgette A
Cuphea ignea cigar flower A
Cynara cardunculus including Scolymus Group globe artichoke and cardoon H
Cynoglossum amabile Chinese forget-me-not H
Dahlia species dahlia H
Delosperma floribundum ice plant H
Delphinium elatum candle larkspur H
Dianthus barbatus sweet william Bi
Dictamnus albus dittany H
Digitalis species foxglove Bi
Dipsacus fullonum Native plant; common teasel Bi
Echinacea purpurea purple coneflower H
Echinops species globe thistle H
Echium vulgare Native plant; viper’s bugloss A
Elaeagnus angustifolia oleaster S
Erica cinerea Native plant; bell heather S
Erica erigena Irish heath S
Erica vagans Native plant; Cornish heath S
Erigeron species fleabane H
Eriophyllum lanatum golden yarrow H
Eryngium alpinum alpine eryngo H
Eryngium giganteum Miss Willmott’s ghost Bi
Eryngium planum blue eryngo H
Eryngium × tripartitum eryngo H
Erysimum species wallflower H or S
Escallonia species escallonia S
Eschscholzia californica California poppy A
Eupatorium cannabinum Native plant; hemp agrimony H
Eupatorium maculatum Joe Pye weed H
Euphorbia cornigera horned spurge H
Euphorbia donii spurge H
Euphorbia sarawschanica Zeravshan spurge H
Ferula communis giant fennel H
Foeniculum vulgare Native plant; common fennel * H
Fragaria × ananassa garden strawberry H
Fuchsia species fuchsia – hardy types S
Gaillardia × grandiflora blanket flower H
Gaura lindheimeri white gaura H
Geranium pratense Native plant; meadow cranesbill H
Geranium species cranesbill (summer-flowering) H
Geum species avens (summer-flowering) H
Gilia capitata blue thimble flower A
Glandularia × hybrida garden verbena A
Glebionis segetum Native plant; corn marigold * A
Gypsophila elegans annual baby’s breath A
Hebe species hebe S
Helenium species Helen’s flower H
Helianthus annuus common sunflower (avoid pollen-free cultivars) A
Helianthus debilis cucumberleaf sunflower A
Heliopsis helianthoides smooth ox-eye H
Heliotropium arborescens common heliotrope A
Heracleum sphondylium Native plant; hogweed Bi
Hesperis matronalis dame’s violet H
Hydrangea anomala subsp. petiolaris climbing hydrangea C
Hydrangea paniculata paniculate hydrangea (only cultivars with many fertile flowers, e.g. ‘Kyushu’, ‘Big Ben’, ‘Floribunda’, ‘Brussels Lace’) S
Hydrotelephium spectabile & hybrids ice plant H
Hydrotelephium telephium Native plant; orpine H
Hyssopus officinalis hyssop S
Iberis amara Native plant; wild candytuft A
Ilex aquifolium Native plant; common holly T
Inula species harvest daisy H
Jasminum officinale common jasmine C
Kalmia latifolia mountain laurel S
Knautia arvensis Native plant; field scabious H
Knautia macedonica Macedonian scabious H
Koelreuteria paniculata pride of India T
Lathyrus latifolius broad-leaved everlasting pea H
Laurus nobilis bay tree S
Lavandula angustifolia English lavender S
Lavandula × intermedia lavandin S
Lavandula stoechas French lavender S
Lavatera olbia tree lavatera S
Lavatera trimestris annual lavatera A
Leucanthemum × superbum Shasta daisy H
Leucanthemum vulgare Native plant; ox-eye daisy H
Liatris spicata button snakewort H
Ligustrum ovalifolium garden privet S
Ligustrum sinense Chinese privet S
Limnanthes douglasii poached egg flower A
Limonium platyphyllum broad-leaved statice H
Linaria maroccana annual toadflax A
Linaria purpurea purple toadflax H
Lobularia maritima sweet alyssum A
Lonicera periclymenum Native plant; common honeysuckle C
Lychnis coronaria rose campion Bi or H
Lychnis flos-cuculi Native plant; ragged robin H
Lysimachia vulgaris Native plant; yellow loosestrife H
Lythrum salicaria Native plant; purple loosestrife H
Lythrum virgatum wand loosestrife H
Malope trifida large-flowered mallow wort A
Malva alcea greater musk mallow H
Malva moschata Native plant; musk mallow H
Matthiola incana hoary stock Bi
Mentha aquatica Native plant; water mint H
Mentha spicata spearmint H
Monarda didyma bergamot H
Myosotis species forget-me-not Bi
Nemophila menziesii baby blue eyes A
Nepeta species catmint H
Nicotiana alata flowering tobacco A
Nicotiana langsdorffii Langsdorff’s tobacco A
Nicotiana sylvestris flowering tobacco Bi
Nigella damascena love-in-a-mist A
Nigella hispanica Spanish fennel flower A
Oenothera species evening primrose Bi
Olearia species daisy bush S
Onopordum acanthium cotton thistle Bi
Origanum onites pot marjoram S
Origanum ‘Rosenkuppel’ marjoram ‘Rosenkuppel’ H
Origanum vulgare Native plant; oregano, wild marjoram H
Paeonia species peony H
Papaver orientale oriental poppy H
Papaver rhoeas Native plant; common poppy * A
Parthenocissus tricuspidata Boston ivy C
Penstemon species beard-tongue H
Perovskia atriplicifolia Russian sage S
Persicaria amplexicaulis red bistort H
Persicaria bistorta Native plant; common bistort H
Phacelia campanularia Californian bluebell A
Phacelia tanacetifolia fiddleneck A
Phaseolus coccineus scarlet runner bean A
Phlomis species sage S
Phlox paniculata perennial phlox H
Photinia davidiana stranvaesia S
Phuopsis stylosa Caucasian crosswort H
Pileostegia viburnoides climbing hydrangea C
Polemonium caeruleum Native plant; Jacob’s ladder H
Potentilla species cinquefoil H or S
Prostanthera cuneata alpine mint bush S
Ptelea trifoliata hop tree S
Pyracantha species firethorn S
Reseda odorata garden mignonette A
Ridolfia segetum false fennel A
Robinia pseudoacacia false acacia T
Rosa species rose S
Rosmarinus officinalis rosemary S
Rubus fruticosus agg. Native plant; blackberry S
Rubus idaeus Native plant; common raspberry S
Rudbeckia species coneflower H or A
Salvia species sage A or H
Sanvitalia procumbens creeping zinnia A
Scabiosa spp. scabious A/H
Sidalcea malviflora checkerbloom H
Solidago species goldenrod H
Sorbus aria Native plant; common whitebeam T
Sorbus aucuparia Native plant; mountain ash, rowan T
Spiraea japonica Japanese spiraea S
Stachys byzantina lamb’s ear H
Stachys macrantha big sage H
Stokesia laevis Stokes’ aster H
Symphoricarpos albus snowberry S
Tagetes patula French marigold A
Tamarix ramosissima tamarisk S
Tanacetum coccineum pyrethrum H
Tanacetum vulgare Native plant; tansy * H
Telekia speciosa yellow ox-eye H
Tetradium daniellii bee-bee tree T
Teucrium chamaedrys Native plant; wall germander H
Thymus species thyme S
Tilia × europaea common lime T
Tilia maximowicziana lime T
Tilia oliveri lime T
Tilia platyphyllos Native plant; broad-leaved lime T
Tithonia rotundifolia Mexican sunflower A
Trachymene coerulea blue lace flower A
Trollius species globeflower H
Tropaeolum majus garden nasturtium A
Verbascum species mullein Bi
Verbena bonariensis purple top H
Verbena rigida slender vervain A
Veronica longifolia garden speedwell H
Veronica spicata speedwell H
Veronicastrum virginicum Culver’s root H
Viburnum lantana Native plant; common wayfaring tree S
Viburnum opulus Native plant; guelder rose S
Vicia faba broad bean A
Weigela florida weigelia S
Zauschneria californica Californian fuchsia S
Zinnia elegans youth and old age A