Every landscape plant (seed producers anyway) has a time during the growing season when it develops flower buds and blooms. The list below reflects blooming dates for common landscape plants in USDA Hardiness Zone 5.

Of course, in different zones, the actual dates of blooming may differ i.e. earlier in the South and later in the North. However, the relative time of bloom for various species will be the same. That is, crocus will bloom before candytuft which will bloom before coneflowers.

Bulbs
AIlium tuberosum (Jul-Aug)
Canna x generals (Jul-Oct)
Gladiolus x hortulanus (Jul-Oct)
Lilium canadense
Lilium davidii macranthum
Lycoris squarnigera (Jul-Aug)

Perennials
Acanthus spinosissimus (Jul-Aug)
Achillea filipendulina (Jun-Aug)
Achillea x lewisii (Jun-Aug)
Achillea millafolium (Jul-Sep)
Aegopodium podagraria 'Variegatum' (Jun-Jul)
Anthemis tinctoria (Jun-Sep)
Asclepias tuberosa (Jun-Aug)
AstlIbe x arendsii (Jun-Jul)
Belamcanda chinensis (Jul-Sep)
Campanula carpatica (Jun-Aug)
Campanula persicifolia (Jun-Jul)
Catananche caerulea (Jul-Aug)
Centaurea montana (May-Jul)
Chrysanthemum coccineum (Jun-Jul)
Chrysanthemum x superbum (Jun-Oct)
Cimicifuga racemosa (Jul-Aug)
Coreopsis lanceolata (Jun-Sep)
Coreopsis verticillata (Jun-Sep)
Delphinium datum (Jun-Jul)
Dicentra eximia (May-Sep)
Digitalis purpurea (Jun-Jul)
Echinacea purpurea (Jul-Sep)
Echinops exaltatus (Jul-Sep)
Erigeron speciosus (Jun-Jul)
Eryngium arnethystinum (Jul-Aug)
Gaillardia x grandiflora (Jun-Sep)
Geranium himalayense (May-Jul)

Geum
species - Avens (May-Aug)
Gypsophila paniculata (Jun-Jul)
Helenum autumnale (Jul-Oct)
Heliopsis helianthoides (Jul-Oct)

Hemerocallis species
(May-Sep)
Heuchera sanguinea (Jun-Jul)
Hibiscus moscheutos (Jul-Oct)
Hosta 'Fortunei'
Hosta undulata (Jul)
Iris kaempferi (Jun-Jul)
Lathyrus latifolius (Jun-Oct)
Lavandula angustifolia (Jun-Sep)
Liatris scariosa (Jul-Sep)
Limorium latifolium (Jul-Aug)
Linum perenne (Jun-Aug)
Liriope spicata (Jul-Aug)
Lobelia cardinalis (Jul-Sep)
Lychnis chalcedonica (Jun-Jul)
Lysimachia clethroides (Jul-Aug)
Lythrum salicaria (Jul-Sep)
Macleaya cordata (Jul-Sep)
Monarda didyma (Jun-Aug)
Opuntia humifusa (Jun-Jul)
Papaver nudicaule (Apr-Jul)
Papaver orientale (Jun-Jul)
Penstemon x gloxinioides (Jun-Aug)
Phlox paniculata (Jul-Sep)
Physostegia vinginiana (Jul-Sep)
Platycodon grandiflorus (Jul-Sep)
Qenothena fruticosa (Jun-Aug)
Rudbeckia hirta var. pulcherima (Jun-Sep)
Salvia farinacea (Jul-Oct)
Salvia x superba (Jun-Aug)
Saxlfraga paniculata (Jun-Jul)
Scabiosa caucasica (Jun-Sep)
Stokesia laevis (Jun-Sep)
Teucreum chamaedrys (Jun-Jul)
Thalictrum rochebrunianum (Jul-Aug)
Tradescantia virginiana (Jun-Aug)
Veronica spicata (Jun-Aug)
Yucca filamentosa (Jun-Aug)

Shrubs
Aralia spinosa
Cephalanthus occidentalis
Clethra species
Hydrangea arborescens 'Grandiflora'
Hydrangea paniculata praecox
Hydrangea quercifolia
Hydrangea serrata
Hypericum kalmianum
Hypericum patulum henryi
Hypericum prolificum
Kalopanax pictus
 
Koelreuteria paniculata
Lespedeza bicolor
Lonicera heckrottii
Maackia amurensis
Nandina domestica
Rhododendron prunifolium
Rhododendron viscosum
Rosa setigera
Rosa wichuraiana
Rubus odoratus

Trees
Oxydendrum arboreum
Stewartia Koreana
Stewartia ovata
Stewartia pseudocamellia
 
Tamarix odessana
Tilia euchlora
Tilia petiolaris
Tilia tomentosa

Vines
Campsis radicans
Clematis x jackmanii (Jun-Sep)
 

July
Acanthus spinosissimus (Jul-Aug)
Achillea filipendulina (Jun-Aug)
Achillea x lewisii (Jun-Aug)
Achillea millafolium (Jul-Sep)
Aegopodium podagraria 'Variegatum' (Jun-Jul)
Anthemis tinctoria (Jun-Sep)
Asclepias tuberosa (Jun-Aug)
AstlIbe x arendsii (Jun-Jul)
Belamcanda chinensis (Jul-Sep)
Campanula carpatica (Jun-Aug)
Campanula persicifolia (Jun-Jul)
Catananche caerulea (Jul-Aug)
Centaurea montana (May-Jul)
Chrysanthemum coccineum (Jun-Jul)
Chrysanthemum x superbum (Jun-Oct)
Cimicifuga racemosa (Jul-Aug)
Clematis x jackmanii (Jun-Sep)
Coreopsis lanceolata (Jun-Sep)
Coreopsis verticillata (Jun-Sep)
Delphinium datum (Jun-Jul)
Dicentra eximia (May-Sep)
Digitalis purpurea (Jun-Jul)
Echinacea purpurea (Jul-Sep)
Echinops exaltatus (Jul-Sep)
Erigeron speciosus (Jun-Jul)
Eryngium arnethystinum (Jul-Aug)
Gaillardia x grandiflora (Jun-Sep)
Geranium himalayense (May-Jul)

Geum
species - Avens (May-Aug)
Gypsophila paniculata (Jun-Jul)
Helenum autumnale (Jul-Oct)
Heliopsis helianthoides (Jul-Oct)

Hemerocallis species
(May-Sep)
Heuchera sanguinea (Jun-Jul)
Hibiscus moscheutos (Jul-Oct)
Hosta undulata (Jul)
Iris kaempferi (Jun-Jul)
Lathyrus latifolius (Jun-Oct)
Lavandula angustifolia (Jun-Sep)
Liatris scariosa (Jul-Sep)
Limorium latifolium (Jul-Aug)
Linum perenne (Jun-Aug)
Liriope spicata (Jul-Aug)
Lobelia cardinalis (Jul-Sep)
Lychnis chalcedonica (Jun-Jul)
Lysimachia clethroides (Jul-Aug)
Lythrum salicaria (Jul-Sep)
Macleaya cordata (Jul-Sep)
Monarda didyma (Jun-Aug)
Opuntia humifusa (Jun-Jul)
Papaver nudicaule (Apr-Jul)
Papaver orientale (Jun-Jul)
Penstemon x gloxinioides (Jun-Aug)
Phlox paniculata (Jul-Sep)
Physostegia vinginiana (Jul-Sep)
Platycodon grandiflorus (Jul-Sep)
Qenothena fruticosa (Jun-Aug)
Rudbeckia hirta var. pulcherima (Jun-Sep)
Salvia farinacea (Jul-Oct)
Salvia x superba (Jun-Aug)
Saxlfraga paniculata (Jun-Jul)
Scabiosa caucasica (Jun-Sep)
Stokesia laevis (Jun-Sep)
Teucreum chamaedrys (Jun-Jul)
Thalictrum rochebrunianum (Jul-Aug)
Tradescantia virginiana (Jun-Aug)
Veronica spicata (Jun-Aug)
Yucca filamentosa (Jun-Aug)
Early July
Anthemis tinctoria
Campanula percisifolia
Coreopsis lanceolata
Cytisus nigricans
Hosta 'Fortunei'
Hydrangea arborescens'Grandiflora'
Hypericum kalmianum
H. patulum henryi
Lavandula officinalis
Lilium amabile
Lychnis chalcedonica
Lycium species
Maackia amurensis
Rhododendron prunifolium
R. viscosum
Rosa setigera
Rubus odoratus
Stewartia Koreana
S. pseudo-camellia
Tilia euchlora
T. petiolaris
T. tomentosa
Veronica spicata
Viburnum setigerum mid-July
Aesculus parviflora
Albizia julibrissin rosea
Amorpha canescens
Campsis radicans
Chrysanthemum parthenum
Cimicifuga racemosa
Clematis jackmanii
Filipendula ulmaria
Gypsophila paniculata
Heliopsis scaber
Hemerocatlis fulva
Hydrangea paniculata praecox
H. quercifolia
H. serrata
Koelreuteria paniculata
Lilium canadense
L. davidii macranthum
Lonicera heckrottii
L. sempervirens
Lythrum salicaria
Monarda didyma
Oxydendrum arboreum
Phlox paniculata
Rosa wichuraiana
Scabiosa caucasica
Stewnrtia ovata
Tamarix odessana
Valeriana officinalis Late July
Abelia schumannii
Achillea fihipendulina
Althaea rosea
Aralia spinosa
Astilbe arendsii
Catluna vulgaris
Campanula carpatica
Cephalanthus occidentalis
Clethra species
Echinops'Taplow Blue'
Hypericum prolificum
Kalopanax pictus
Lespedeza bicolor
Nandina domestica
Platycodon grandiflorum
Sorbaria arborea
Stokesia laevis
Veronica longifotia
Yucca smaillana
 

July
Bicolor:
  • Aconitum nepellus
 
Blue:
  • Aconitum nepellus
  • Adenopharo can fuso
  • Echinaps ritro
  • Eryngium omethystinum
  • Genetona osclepiodeo
  • G. septemtida
  • Limorium lotifolium
  • Perovskio atripffcifolia
  • Phlox paniculala
  • Platycadan grandiflorus
  • Stakesia loews
  • Veronica longifolio
Orange:
  • Asclepios tuberosa
  • Belamcando chinensis
  • Ligularia denticulata
  • Lilium canadiense
  • Phlox poniculata
Pink:
  • AlThaea rasea
  • Echinacea pu'purea
  • Hibiscus moscheutos
  • Lath ynjs lot/to/ius
  • Monorda didyma
  • Phlox pan iculato
  • plolycadan grandif/aws
  • Sidoiceo moiviflara
  • Teucrium chamaecirys
  • Tunico saxifraga
Purple:
  • Monarda didyma
  • Phlox paniculata

 

Red:
  • Althaea rosea
  • Centranthus ruber
  • Hibiscus mascheutas
  • Lilium tighnum
  • Lobelia cardinalis
  • Manarda didyma
  • Phlox paniculala
White:
  • A caniturn nopellus
  • Althoea rasea
  • Anaphalis yedaensis
  • Cimicifuga racemasa
  • Echinaceo purpurea
  • Echinaps ritra
  • Hibiscus moscheutas
  • Lysimochia clethraides
  • Macleoya card ala
  • Manarda didyma
  • Phlox paniculala
  • Platycodon grandiflaws
  • Stakesea laevis
  • Valeriona officinalis
  • Yucca filamentosa

 

Yellow:
  • Althoea raseo
  • Centaurea macracephala
  • Careapsis vertici/lata
  • Rudbeckia fulgido
  • Ruta grovealens
  • Thalictrum speciasissimum

 

 

 
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