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
Lilium tigrinum  

Perennials
Acanthus spinosissimus (Jul-Aug)
Achillea filipendullna (Jun-Aug)
Achillea millefolium (Jul-Sep)
Achillea x lewisii (Jun-Aug)
Aconiturn napellus (Aug-Sep)
Anthemis tinctoria (Jun-Sep)
Asclepias tuberosa (Jun-Aug)
Aster novae-belgii (Aug-Oct)
Belamcanda chinensis (Jul-Sep)
Campanula carpatica (Jun-Aug)
Catananche caerulea (Jul-Aug)
Ceratostigma plumbaginoldes (Aug-Oct)
Chrysanthemum morifolium (Aug-Oct)
Chrysanthemum x supenbum (Jun-Oct)
Cimicifuga nacemosa (Jul-Aug)
Coreopsis lanceolata (Jun-Sep)
Coreopsis verticillata (Jun-Sep)
Dicentra eximia (May-Sep)
Echinacea purpurea (Jul-Sep)
Echinops exaltatus (Jul-Sep)
Eryngium amethystinum (Jul-Aug)
Eupatorium coelestinum (Aug-Oct)
Gaillardia x grandiflora (Jun-Sep)
Geum species - Avens (May-Aug)
Helenum autumnale (Jul-Oct)
Heliopsis helianthoides (Jul-Oct)
Hemerocallis species (May-Sep)
Hibiscus moscheutos (Jul-Oct)
Hosta lancifolia
Hosta plantaginea (Aug-Sep)
Kniphofia uvaria (Aug-Sep)
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)
Lysimachia clethroldes (Jul-Aug)
Lythnum salicaria (Jul-Sep)
Macleaya cordata (Jul-Sep)
Monarda didyma (Jun-Aug)
Oenothera fruticosa (Jun-Aug)
Penstemon x gloxinioides (Jun-Aug)
Phlox paniculata (Jul-Sep)
Physostegia virginiana (Jul-Sep)
Platycodon grandiflorus (Jul-Sep)
Polygonum cuspldatum var. compactum (Aug-Oct)
Rudbeckia hirta var. pulcherrima (Jun-Sep)
Rudbeckia suillvantii
Salvia faninacea (Jul-Oct)
Salvia x superba (Jun-Aug)
Scabiosa caucasica (Jun-Sep)
Sedum spectablIe (Aug-Oct)
Stokesia laevis (Jun-Sep)
Thalictrum rochebrunianum (Jul-Aug)
Tradescantia virginiana (Jun-Aug)
Veronica spicata (Jun-Aug)
Yucca filamentosa (Jun-Aug)

Shrubs
Abelia grandiflora
Aralia chinensis
Aralia elata
Buddleia davidii
 
Caryopteris incana
Hibiscus syriacus
Hydrangea macrophylla
Hydrangea paniculata
Hydrangea paniculata 'Grandiflora

Trees
Evodia danielii
Sophora japonica
 

Vines
Clematis x jackmanii (Jun-Sep)
Clematis virginiana
Clematis vitalba
Polygonum aubertii
 

August
Acanthus spinosissimus (Jul-Aug)
Achillea Filipendullna (Jun-Aug)
Achillea millefolium (Jul-Sep)
Achillea x lewisii (Jun-Aug)
Aconiturn napellus (Aug-Sep)
Anthemis tinctoria (Jun-Sep)
Asclepias tuberosa (Jun-Aug)
Aster novae-belgii (Aug-Oct)
Belamcanda chinensis (Jul-Sep)
Campanula carpatica (Jun-Aug)
Catananche caerulea (Jul-Aug)
Ceratostigma plumbaginoldes (Aug-Oct)
Chrysanthemum morifolium (Aug-Oct)
Chrysanthemum x supenbum (Jun-Oct)
Cimicifuga nacemosa (Jul-Aug)
Clematis x jackmanii (Jun-Sep)
Coreopsis lanceolata (Jun-Sep)
Coreopsis verticillata (Jun-Sep)
Dicentra eximia (May-Sep)
Echinacea purpurea (Jul-Sep)
Echinops exaltatus (Jul-Sep)
Eryngium amethystinum (Jul-Aug)
Eupatorium coelestinum (Aug-Oct)
Gaillardia x grandiflora (Jun-Sep)
Geum species - Avens (May-Aug)
Helenum autumnale (Jul-Oct)
Heliopsis helianthoides (Jul-Oct)
Hemerocallis species (May-Sep)
Hibiscus moscheutos (Jul-Oct)
Hosta plantaginea (Aug-Sep)
Kniphofia uvaria (Aug-Sep)
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)
Lysimachia clethroldes (Jul-Aug)
Lythnum salicaria (Jul-Sep)
Macleaya cordata (Jul-Sep)
Monarda didyma (Jun-Aug)
Oenothera fruticosa (Jun-Aug)
Penstemon x gloxinioides (Jun-Aug)
Phlox paniculata (Jul-Sep)
Physostegia virginiana (Jul-Sep)
Platycodon grandiflorus (Jul-Sep)
Polygonum cuspldatum var. compactum (Aug-Oct)
Rudbeckia hirta var. pulcherrima (Jun-Sep)
Salvia faninacea (Jul-Oct)
Salvia x superba (Jun-Aug)
Scabiosa caucasica (Jun-Sep)
Sedum spectablIe (Aug-Oct)
Stokesia laevis (Jun-Sep)
Thalictrum rochebrunianum (Jul-Aug)
Tradescantia virginiana (Jun-Aug)
Veronica spicata (Jun-Aug)
Yucca filamentosa (Jun-Aug)
Early August
Abelia grandiflora
Aralia chinensis
A. elata
Asclepias tuberosa
Buddleia davidii
Caryopteris incana
Hydrangea macrophylla
H. paniculata
H. paniculata 'Grandiflora 'Liatris scariosa
Lilium tigrinum
Lobelia cardinalis
Physostegia virginiana mid-August
Aconitum napeltus
Artemisia lactiflora
Clematis virginiana
C. vitalba
Hibiscus syriacus
Hosta lancifolia
Hosta plantaginea
Lagerstroemia indica
Rudbeckia suillvantii
Sedum spectabile
Vitex species
Late August
Chrysanthemum moriifolium
Clerodendrum trichotomum
Evodia danie!lii
Helenum autumnale
Polygonum aubertii
Sophora japonica
 

August
Bicolor:
  • Kniphofia uvaria
 
Blue:
  • Ceratastigma plumbaginaides
  • Clematis heracteifalia
  • Labelia siphilitica
 
Orange:
  • Kniphofia uvarto
 
Pink:
  • Anemone viIitalia
  • Aster navae-angliae
  • AsHibe chinensis
  • A. taquetii
  • Chelone lyonii
  • Kniphofia uvaria
  • Physostegia virginiana
  • Sedum spectabile hybhds
Purple:
  • Aster novae angilae
  • Eupatorium caelestinum
     
  • Hosta 'Fortunei Albomarginata '
  • H decarata
  • H fartunei
  • H Iancifolia
  • H ventrcosa
  • Liatris pycnastachya
  • Liatris scariaso
  • Liriope muscari
  • Liriope spicata
  • Thalictrum delavayi
Red:
  • Aster navae-angliae
  • Helenum autumnale
  • Physostegia virginiana
 
White:
  • Kniphatia uvorio
  • Physastegia virginiona

 

Yellow:
  • Heleneum autumnale
  • Helianthus
  • Kniphofia uvaria
  • Liguloria stenacephala
  • Rudbeckia lacinioto
  • Santolia chamoecyparissus
  • Sempervirens
  • Salidaga

 

 
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