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Average Bloom Times

These are the average bloom times for a typical year, 1998. Please be aware that blooming dates are very variable from year to year due to weather conditions.

Botanical Name

Common Name

First Bloom 1998

Last Bloom 1998

Bulbs

 

 

 

Crocus tommasinianus

Tommies

9 February

9 March

Scilla siberica

Siberian squill

13 February

7 April

Scilla tubergeniana

 

11 February

7 April

Eranthis hyemalis

Winter aconites

1 February

28 February

Galanthus nivalis

Snowdrops

1 February

9 March

Leucojum vernum

Spring snowflake

20 February

5 March

Narcissus sp.

Daffodils

18 February

20 April

Chionodoxa luciliae

Glory of the snow

27 February

1 April

Crocus sp.

Crocus

25 February

30 March

Galanthus nivalis ‘Flore Pleno’

Double snowdrops

27 February

5 March

Iris reticulata

Dwarf iris

27 February

17 March

Muscari sp.

Grape hyacinth

5 March

15 April

Anemone blanda

 

5 March

15 April

Ipheion uniflorum

Spring starflower

13 March

15 April

Tulipa sp.

 Tulip

1 April

21 April

Ornithogalum umbellatum

Star of Bethlehem

14 April

26 April

Fritillaria meleagris

Guinea hen

7 April

20 April

Scilla campanulata

Bluebells

13 April

7 May

Iris germanica

Bearded iris

1 May

8 May

Iris siberica

Siberian iris

7 May

18 May

Hemerocallis fulva

Tawny daylily

8 June

29 June

Hemerocallis flava

Lemon lily

29 June

31 July

Lilium sp.

Asiatic lily

1 June

15 July

Lycoris squamigera

Resurrection lily

27 July

15 August

Crocus speciosus

Fall crocus

15 September

22 September

Herbaceous

 

 

 

Calendula officinalis

Pot marigold

all winter

all winter

Bellis perennis

English daisies

1 February

1 July

Helleborus orientalis

Lenten rose

January

April

Iberis sempervirens

Candytuft

10 March

1 June

Mertensia virginica

Virginia bluebells

24 March

1 May

Brunnera macrophylla

Siberian bugloss

24 March

15 June

Epimedium sp.

Epimedium

24 March

1 June

Cheiranthus cheirii

Wallflowers

24 March

1 June

Arabis causcasia

Rock cress

24 March

1 June

Claytonia virginica

Spring-beauty

24 March

15 April

Viola tricolor

Johnny-jump-up

24 March

1 June

Viola x wittrockiana

Pansy

24 March

1 June

Digitalis purpureum

Foxglove

27 April

1 June

Digitalis lanata

Grecian foxglove

21 May

31 May

Aquilegia sp.

Columbine

21 April

1 June

Dodecatheon meadia

Shooting star

25 April

15 May

Chrysongonum  virginianum

Green and gold

1 May

15 May

Convallaria majalis

Lily of the valley

20 April

9 May

Polygonatum biflorum

Solomon’s seal

1 May

15 May

Primula sp.

Primroses

13 April

1 June

Paeonia sp.

Peony

21 April

30 June

Papaver nudicaule ‘Wonderland’

Icelandic poppy

25 April

1 June

Lilium hybrids

Asiatic lilies

1 June

15 July

Malva sylvestris

Moon and stars

1 June

21 June

Alcea

Hollyhocks

1 June

15 July

Astilbe x arendsii

False spirea

1 June

1 July

Antirrhinum

Snapdragons

1 May

15 May

Achillea

Yarrow

15 June

all summer

Baptisia australis

False indigo

1 June

1 July

Chrysanthemum leucanthemum

Shasta daisy

1 June

1 July

Dianthus caesius

Pinks

15 May

15 June

Echinacea purpurea

Purple coneflower

15 June

all summer

Nigella damascena

Love-in-a-mist

21 June

15 July

Liatris spicata

Liatris

21 June

August

Monarda didyma

Beebalm

29 June

all summer

Rudbeckia fulgida

Black eyed susan

21 June

all summer

Stokesia laevis

Stoke’s aster

21 June

August

Ageratum

Ageratum

21June

all summer

Lantana

Lantana

15 June

all summer

Salvia spp.

Salvia

21 August

frost

Rudbeckia hirta

Gloriosa daisy

21June

all summer

Clematis heracleifolia

Tube clematis

15 June

1 September

Cosmos

Cosmos

20 July

all summer

Lobelia cardinalis

Cardinal flower

30 July

15 September

Lobelia siphilitica

Blue cardinal flower

30 July

15 September

Canna sp.

Indian shot

20 July

frost

Zinnia

 Zinnia

1 July

frost

Aster divaricatus

White wood aster

21 August

21 September

Aster novae-angliae

New England aster

15 August

15 September

Anemone hupehensis var. japonica

Japanese anemones

21 August

15 September

Verbena bonariensis

 Verbena

15 August

all summer

Dahlia

 Dahlia

1 August

all summer

Limonium

Statice

15 August

all summer

Aster novi-belgii

Michelmas daisy

21 September

frost

Aster tataricus

Tatarian asters

21 September

frost

Lespedeza thunbergii

 

1 September

21 September

Dendranthema grandiflora

Chrysanthemum

1 September

frost

Shrubs

 

 

 

Chaenomeles sp.

Flowering quince

18 February

10 March

Jasminum nudiflorum

Winter jasmine

9 January

1 March

Daphne odora ‘Aureo-marginata’

Fragrant  daphne

20 February

15 April

Lonicera fragrantissima

Winter honeysuckle

16 February

1 April

Mahonia aquifolium

Oregon grapeholly

20 February

15 April

Pieris japonica

Japanese pieris

20 February

1 July

Hamamelis spp.

Witch hazel

1 February

1 March

Forsythia suspensa var. sieboldii

Weeping forsythia

23 February

10 March

Forsythia sp.

Forsythia

10 March

peak 29 March

Kerria japonica

Japanese rose

24 March

15 April

Viburnum x burkwoodii

 Viburnum

20 March

15 April

Viburnum carlesii

 Viburnum

20 March

15 April

Poncirus trifoliata

Trifoliate orange

1 April

15 April

Syringa

Lilac

3 April

1 May

Rhododendron spp.

 Rhododendron

3 June

15 June

Azalea ‘Indica Alba’

 Azalea

16 April

1 May

Azalea ‘Poukhanense Pink’

 Azalea

20 April

30 April

Deutzia gracilis

 Deutzia

14 April

1 June

Viburnum trilobum

American cranberrybush

20 April

1 June

Viburnum plicatum var. tomentosum

Doublefile viburnum

23 April

1 June

Leucothoe fontanesiana

Drooping leucothoe

23 April

1 June

Rosa sp.

Roses

24 April

all summer

Calycanthus floridus

Sweetshrub

5 April

1 June

Pyracantha coccinea

Firethorn

21 April

1 June

Philadelphus coronarius

Mockorange

29 April

1 June

Weigela florida

Weigela

28 April

1 June

Kolkwitzia amabilis

Beautybush

27 April

1 June

Chionanthus virginicus

Grancy gray beard

27 April

1 June

Deutzia scabra ‘Plena’

 Deutzia

4 May

1 June

Philadelphus coronarius

Mock orange

3 May

1 June

Deutzia crenata or scabra

 Deutzia

3 May

1 June

Cotinus coggygria

Smokebush

7 May

1 June

Nerium oleander

Oleander

15 July

frost

Abelia grandiflora

Glossy abelia

15 July

all summer

Buddleia davidii

Butterfly bush

1 July

all summer

Trees

 

 

 

Acer rubrum

Red maple

15 January

1 March

Prunus subhirtella var. autumnalis

Autumnalis cherry

all winter

7 April

Prunus subhirtella var. pendula

Weeping Cherry

5 March

1 April

Cornus mas

Cornelian cherry

20 February

1 April

Prunus x blireiana

Blireiana plum

15 March

1 April

Magnolia kobus

Kobus magnolia

15 March

5 April

Magnolia stellata

Star magnolia

17 March

5 April

Magnolia denudata

Yulan magnolia

17 March

5 April

Magnolia denudata ‘Purple Eye’

Yulan magnolia

17 March

5 April

Magnolia ‘Galaxy’

Lily magnolia

31 March

30 April

Pyrus x lecontei ‘Keiffer’

Keiffer pear

20 March

1 April

Pyrus pyrifolia

Chinese sand pear

30 March

1 April

Prunus x yedoensis

Yoshino

28 March

1 April

Prunus cerasus

Sour cherry

28 March

1 April

Pseudocydonia sinensis

Quince

31 March

1 April

Malus sp.

Crabapples

1 April

15 Apr

Halesia carolina

Carolina silverbell

15 April

April 30

Cornus florida

Dogwood

6 April

1 June

Paulownia tomentosa

Empress tree

20 April

1 June

Styrax japonica

Japanese snowbell

15 April

30 April

Styrax obassia

Fragrant snowbell

27 April

1 June

Liriodendron tulipifera

Tulip tree

27 April

1 June

Syringa pekinensis

Pekin lilac

7 May

1 June

Cornus kousa

Chinese dogwood

14 May

1 July

Magnolia grandiflora

Southern magnolia

21 May

15 June

Lagerstroemia indica

Crape myrtle

20 July

5 August

Elaeagnus pungens

Elaeagnus

1 October

15 October

Vines

 

 

 

Akebia quinata

Five leaf akebia

20 February

1 June

Wistaria sinensis

Chinese wisteria

13 April

1 May

Wistaria japonica

Japanese wisteria

19 April

1 May

Clematis x Nelly Moser

 Clematis

27 April

3 June

Dolichos lablab

Hyacinth vine

15 September

frost

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