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
   

Perennials
Achillea x lewisii (Jun-Aug)
Aegopodium poclagraria 'Variegatum' (Jun-Jul)
AlchemiIla vulgaris (May-Jun)
Allium giganteum (Jun-Jul)
Anthemis tinctoria (Jun-Sep)
Aguilegia hybrida (May-Jun)
Armeria maritima (May-Jun)
Asclepias tuberosa (Jun-Aug)
Astilbe x arendsii (Jun-Jul)
Baptisia australis (May-Jun)
Brunnera macrophylla (Apr-Jun)
Campanula carpatica (Jun-Aug)
Campanula persicifolia (Jun-Jul)
Centaurea montana (May-Jul)
Cerastium tomentosum (May-Jun)
Chrysanthemum coccineum (Jun-Jul)
Chrysanthemum x superbum (Jun-Oct)
Coreopsis lanceolata (Jun-Sep)
Coreopsis verticillata (Jun-Sep)
Delphinium elatum (Jun-Jul)
Dianthus plumarius (May-Jun)
Dicentra eximia (May-Sep)
Dicentra spectabilis (May-Jun)
Dictamnus albus (May-Jun)
Digitalis purpurea (Jun-Jul)
Epimedium x rubrum (May-Jun)
Erigeron speciosus (Jun-Jul)
Rudbeckia hirta var. pulchemima (Jun-Sep)
Salvia x superba (Jun-Aug)
Saponaria ocymoldes (Jun)
Saxifraga paniculata (Jun-Jul)
Scabiosa caucasica (Jun-Sep)
Stokesia laevis (Jun-Sep)
Teucrium chamaedrys (Jun-Jul)
Filipendulina (Jun-Aug)
Euphorbia cyparissias (May-Jun)
Gaillardia x grandiflora (Jun-Sep)
Galium odoratum (May-Jun)
Geranium himalayense (May-Jul)

Geum
species - Avens (May-Aug)
Gypsophila paniculata (Jun-Jul)

Hemerocallis species
(May-Sep)
Heuchera sanguinea (Jun-Jul)
Iris species - Iris (May-Jun)
Iris kaempferi (Jun-Jul)
Iris sibirica  (Jun)
Lathyrus latifolius (Jun-Oct)
Lavandula angustifolia (Jun-Sep)
Linum perenne (Jun-Aug)
Lupinus 'Russell Hybrid' (Jun)
Lychnis chalcedonica (Jun-Jul)
Monarda didyma (Jun-Aug)
Oenothera fruticosa (Jun-Aug)
Opuntia humifusa (Jun-Jul)
Paeonia lactiflora (May-Jun)
Paeonia suffruticosa (May-Jun)
Papaver nudicaule (Apr-Jul)
Papaver orientale (Jun-Jul)
Penstemon x gloxinioicles (Jun-Aug)
Polemorium caeruleum (May-Jun)
Polygonatum commutatum (May-Jun)
Thymus serpyllum (May-Jun)
Tradescantia virginiana (Jun-Aug)
Trollius europaeus (May-Jun)
Veronica spicata (Jun-Aug)
Waldsteinia fragarioides (May-Jun)
Yucca filamentosa (Jun-Aug)

Shrubs
Buddleia altemifolia
Cornus racemosa
Cotoneaster dielsiana
Cotoneaster horizontalis
Cotoneaster multiflora
Deutzia 'Contraste'
Deutzia 'Magicien'
Deutzia magnifica
Ilex verticillata
Kalmia latifolia
Kolkwitzia amabilis
Leucothoe fontanesiana

Ligustrum
species
Lonicera henryi
Lonicera japonica 'Haillana'
Magnolia obovata
Magnolia sieboldii
Philadeiphus coronariusp. maximus
Philadelphus - many
Philadelphus virginalis
Pyracantha coccinea
Rhododendron arbutifolium
Rhododendron calendulaceum
Rhododendron catawbiense-most vars.
Rhododendron laetevirens
Rhododendron minus
Rhododendron 'Album Elegans'
Rhododendron 'Album Grandiflorum'
 
Rhododendron arborescens
Rhododendron maximum
Rosa blanda
Rosa foetida bicolor
Rosa harisonii
Rosa rubrifolia
Rosa rugosa
Rosa spinossisima
Sambucus canadensis
Sorbaria sorbifolia
Spiraea biillardii
Spiraea bumalda
Spiraea tomentosa
Stephanandra incisa
Styrax species
Symphoricarpos atbus laevigatus
Syringa amureasis
Syringa henryi
Syringa josikaea
Syringa prestoriae
Syringa reIlexa
Syringa villosa
Viburnum cassinoides
Viburnum dentatum
Viburnum dilatatum
Viburnum opulus
Viburnum prunifolium
Viburnum snrgentii
Weigela

Trees
Ailanthus altissima
Castanea moltissima
Catalpa speciosa
Chionanthus species
Cladrastis lutea
Cornus alba
Cornus kousa

 
Crataegus phaenopyrum
Ilex opaca
Liriodendron tulipifera
Robinia hispida
Robinia pseudoacacia
Tilia platyphyllos
Tilia americana

Vines
Clematis x jackmanii (Jun-Sep)
Hydrangea anomala var petiolaris
Schizophragma hydrangeoides
 

June
Achillea x lewisii (Jun-Aug)
Aegopodium poclagraria 'Variegatum' (Jun-Jul)
AlchemiIla vulgaris (May-Jun)
Allium giganteum (Jun-Jul)
Anthemis tinctoria (Jun-Sep)
Aguilegia hybrida (May-Jun)
Armeria maritima (May-Jun)
Asclepias tuberosa (Jun-Aug)
Astilbe x arendsii (Jun-Jul)
Baptisia australis (May-Jun)
Brunnera macrophylla (Apr-Jun)
Campanula carpatica (Jun-Aug)
Campanula persicifolia (Jun-Jul)
Centaurea montana (May-Jul)
Cerastium tomentosum (May-Jun)
Chrysanthemum coccineum (Jun-Jul)
Chrysanthemum x superbum (Jun-Oct)
Clematis x jackmanii (Jun-Sep)
Coreopsis lanceolata (Jun-Sep)
Coreopsis verticillata (Jun-Sep)
Delphinium elatum (Jun-Jul)
Dianthus plumarius (May-Jun)
Dicentra eximia (May-Sep)
Dicentra spectabilis (May-Jun)
Dictamnus albus (May-Jun)
Digitalis purpurea (Jun-Jul)
Epimedium x rubrum (May-Jun)
Erigeron speciosus (Jun-Jul)
Rudbeckia hirta var. pulchemima (Jun-Sep)
Salvia x superba (Jun-Aug)
Saponaria ocymoldes (Jun)
Saxifraga paniculata (Jun-Jul)
Scabiosa caucasica (Jun-Sep)
Stokesia laevis (Jun-Sep)
Teucrium chamaedrys (Jun-Jul)
Filipendulina (Jun-Aug)
Euphorbia cyparissias (May-Jun)
Gaillardia x grandiflora (Jun-Sep)
Galium odoratum (May-Jun)Geranium himalayense (May-Jul)
Geum
species - Avens (May-Aug)Gypsophila paniculata (Jun-Jul)

Hemerocallis species
(May-Sep)Heuchera sanguinea (Jun-Jul)
Iris species - Iris (May-Jun)
Iris kaempferi (Jun-Jul)
Iris sibirica  (Jun)
Lathyrus latifolius (Jun-Oct)Lavandula angustifolia (Jun-Sep)
Linum perenne (Jun-Aug)
Lupinus 'Russell Hybrid' (Jun)Lychnis chalcedonica (Jun-Jul)Monarda didyma (Jun-Aug)Oenothera fruticosa (Jun-Aug)Opuntia humifusa (Jun-Jul)
Paeonia lactiflora (May-Jun)
Paeonia suffruticosa (May-Jun)Papaver nudicaule (Apr-Jul)Papaver orientale (Jun-Jul)
Penstemon x gloxinioicles (Jun-Aug)
Polemorium caeruleum (May-Jun)Polygonatum commutatum (May-Jun)
Thymus serpyllum (May-Jun)Tradescantia virginiana (Jun-Aug)
Trollius europaeus (May-Jun)Veronica spicata (Jun-Aug)Waldsteinia fragarioides (May-Jun)Yucca filamentosa (Jun-Aug)
 Early June
Aquilegia hybrida
Buddleia altemifolia
Centaurea montana
Cerastium tomentosum
Chionanthus species
Cladrastis lutea
Cornus alba
C. kousa
Dianthus plumarius
Genista tinctoria
Geranium sanguineum
Gypsophila repens
Helianthemum nummutarium
Heuchera sanguinea
Hydrangea anomala var petiolaris
Ilex opaca
Indigofera amblyantha
Jamesia americana
Kolkwitzia amabilis
Leucothoe fontanesiana
Linum perenne
Magnolia obovata
M. sieboldii
Philadeiphus coronariusp. maximus
Priniula japonica
Rhododendron arbutifolium
R. calendulaceum
R. catawbiense-most vars.
R. laetevirens
R. minus
Robinia hispida
R. 'ldaho
R. pseudoacacia
Rosa blanda
R. foetida bicolor
K. harisonii
R. rubrifolia
It. rugosa
R. spinossisima
Salvia pratensis
Styrax species
Syringa henryi
S. josikaea
S. prestoriae
S. reIlexa
S. villosa
Thalictrum aquilegifolium
Tradescantia virginiana
Viburnum cassinoides
V. dentatum
V. dilatatum
V. opulus
V. prunifolium
V. snrgentii mid-June
Amorpha fruticosa
Anchusa azurea
Baptisia australis
Castanea moltissima
Catalpa speciosa
Chrysanthemum coccineum
C. maximum
Convallaria majalis
Cornus racemosa
Cotoneaster dielsiana
C. horizontalis
C. multiflora
Crataegus phaenopyrum

Delphinium
species
Deutzia 'Contraste'
D. 'Magicien'
D. magnifica
Dictamus albus
Filipendula hexapetala
Gaillardia aristata
Ilex glabra
I. verticillata
Iris sibirica
Kalmia latifolia

Ligustrum
species
Liriodendron tulipifera
Lonicera japonica'Haillana 'Lupinus polyphyllus
Myosotis scorpioides
Papaver orientale
Philadelphus-many species and cultivars
Pyracantha coccinea
Rhododendron'Album Elegans'
K. 'Album Grandiflorum'
Rhododendron arborescens
Rosa-many species
Stephanandra incisa
Symphoricarpos atbus laevigatus
Syringa amureasis
Tilia platyphyllos
Trollius ledebouri
Veronica latifolia
Weigela 'Cong0 feet
W. 'Eve Rathke'
Zenobia pulverulenta Late June
Achillea tomentosa
Ailanthus altissima
Campanula latifolia
Centaurea dealbata
Dianthus barbatus
Digitalis purpurea
Iris kaempferi
Itea virginica
Lavandula olficinalis
Lilium pumilum
Lonicera henryi
Philadelphus virginalis
Rhododendron maximum
Sambucus canadensis
Schizophragma hydrangeoides
Sorbaria sorbifolia
Spiraea biillardii
S. bumalda
S. tomentosa
Thermopsis carotiniana
Tilia americana
Tripterygium regelii
 

June
Bicolor:  
Blue:
  • Amsoria tabemaemontana
  • Anchusa azurea
  • Baptisia austrolis
  • Camnpcnula carpotico
  • C. laohflara
  • C. persicif alia
  • C. pascharskyana
  • C. rotundifolia
  • Clematis integrifollo
  • Delphinium belladonna 
  • D. eloturn
  • D. grondiflorum
  • Erigeron spectasus
  • Geranium endressii
  • Iris koempfert
  • I. sibirico
  • Lavandula angustifolia
  • Lupinus palyphyllus
  • Penstemon heterophyllus
  • Salvia haamatodes
  • S. superba 
  • Scabiosa caucasica
  • Tradescantisa andersoniona
  • Veronica incona
  • V. lotifolia
  • V. spicato
Orange:
  • Hellonthemum nummulorium
  • Hemerocailis fulva
  • Lillum 
  • Papaverarintale
  • Troilas ledebouril

 

Pink::
  • Astilbe arendsii
  • Campanula hocliflora
  • ChrysanThemum caccineum
  • Dianthus camyaph yrius
  • Digitalis mertonensis 
  • Erigeran spociosus
  • Fiilpendula palmato
  • F nibra
  • Geranium endressii
  • Gypsophila paniculata
  • G. reptans
  • Helianthemum nummularium

  • Hemerocallis species - Daylily
  • Lovandula ongusfifolio
  • Lilium 
  • Lupinus polyphyllus
  • Lychnis caronaria
  • Lythnjm salicario
  • Poeonea lactifloro 
  • Papover onent ale
  • Pens fernon barbafus
  • PatentiIla nepalensis
  • Semper4vum fec forum
  • Thymus lanuginosus
  • T. serpylbum
  • Tradescantia andersanian
Purple:
  • AlIium giganteum
  • Aster frikarlii
  • Astilbe arendsii
  • Campanula glomerata
  • Centaurea deolbato
  • Delphimum alatum
  • D. grandiflorim
  • Hemeracoills 
  • Hesperis matronSis
  • Hosta venusta
  • Iris kaempfert
  • I. sibirico
  • Lavandula angusf ifolia
  • Lilium 
  • Lupinus polyphyllus
  • Lythwm salicaria
  • Nepeto faossenii
  • Penstemon barbatus
  • Thymus serpy/lum
  • Trodesconfio ondersoniona
Red:    
White:    
Yellow:    

 

 
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