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Annual Gardening

Annual Seed Starting Date Charts

Common Name

Bontanical Name

Seed Start date

Germination

Plant out date

Comments

African Daisy

Dimorphotheca sinuata

Mar 15

3-4 wks

Jun 1

 

Ageratum

Ageratum houstsnianum

Feb 15-30

1-2 wks

Jun 1

do not cover

Baby blue eyes

Nemophilia  menziesii

May 1

1-2 wks

May 15

can sow outside in May

Bachelor’s button

Centaurea cyanus

May 1

1-2 wks

May 15

needs darkness; can sow outside in May

Balsam

Impatiens balsamina

Apr 1-15

1-2 wks

Jun 15

 

Begonia

Begonia semperforens

Jan 15

2-6 wks

Jun 15

difficult to grow from seed

Browallia

Browallia speciosa

Apr 1-15

2-3 wks

Jun 1

do not cover seeds

Butterfly flower

Schizanthus pinnatus

Mar 1

2-3 wks

Jun 1

cover flat

Calendula

Calendula officinalis

Mar 15-30

1-2 wks

May 15

cover flats; may be sown outside in May

California Poppy

Eschscholzia californica

Sow   outside

1-3 wks

 

sow outside early in May

Candytuft

Iberis umbellata

Apr 1-15

1-2 wks

May 15

can be sown outside in May

China aster

Callistephus chinensis

Apr 1-15

1-2 wks

Jun 1

 

China pink

Dianthus chinensis

Apr 1-15

1-2 wks

Jun 1

 

Clarkia

Clarkia unguiculata

Sow   outside

1-2 wks

 

sow outside in early May

Cockscomb

Celosia cristata

Apr 1

1-2 wks

Jun 1

use peat pots

Coleus

Coleus blumei

Mar 15

1-2 wks

Jun 1

do not cover seeds

Common Name

Bontanical Name

Seed Start date

Germination

Plant out date

Comments

Cosmos

Cosmos bipinnatus

Apr 7-21

1-2 wks

Jun 1

can be sown outside in May

Cup flower

Nierembergia hippomanica

Mar 1

2-3 wks

Jun 1

 

Dusty miller

Centaurea cineraria

Mar 15-30

1-2 wks

Jun 1

do not cover seeds

Evening scented stock

Matthiola longipetala

Apr 1-15

1-2 wks

Jun 1

do not cover seeds

Four o’clock

Mirabilis jalapa

Apr 1-15

1-2 wks

Jun 1

can be sown outside

Fried egg plant

Limnanthes douglasii

May 1

1-2 wks

Jun 1

can sow outside in May

Fuchsia

Fuchsia x hybrida

Feb 1

2-3 wks

Jun 15

tender perennial

Geranium

Pelargonium x hortorum

Feb 1

2-3 wks

Jun 1

tender perennial

Globe amaranth

Gomphrena globosa

Apr 1-15

2-3 wks

Jun 1

 

Godetia

Clarkia amoena

Apr 1– 15

1-2 wks

May 15

do not cover seeds

Heliotrope

Heliotropium aborescens

Feb 1-15

1-2 wks

Jun 15

 

Impatiens

Impatiens wallerana

Mar 1-15

2-3 wks

Jun 1

do not cover seeds

Kenilworth ivy

Cymbalaria muralis

Apr 1-15

1-2 wks

Jun 1

self-seeds; can be invasive

Lavatera

Lavatera trimestris

Apr 1-15

2-3 wks

May 15

can sow outside in May

Livingstone daisy

Mesembryanthemum

Mar 15

2-3 wks

Jun 1

cover flat

Lobelia

Lobelia erinus

Feb 15

2-3 wks

Jun 1

do not cover

Love-in-a-mist

Nigella damascena

Apr 1-15

2-3 wks

May 15

can be sown outside in May

Marigolds

Tagetes spp.

Apr 1-15

1 wk

May 15

 


Common Name

Bontanical Name

Seed Start date

Germination

Plant out date

Comments

Nasturtium

Tropaeolum majus

Apr 15

1-2 wks

May 15

can be sown outside in May

Nemesia

Nemesia strumosa

Mar 15

1-2 wks

Jun 15

 

Nicotiana

Nicotiana alata

Mar 15-Apr 1

2-3 wks

Jun 1

do not cover seeds

Ornamental kale

Brassica oleracea acephala

Jan 15-Mar 15

1-2 wks

May 15

 

Pansy

Viola x wittrockiana

Mar 1-15

2-3 wks

May 15

cover flat; refrigerate 4-5 days

Petunia

Petunia x hybrida

Mar 15

1-2 wks

Jun 1

do not cover seeds

Phlox

Phlox drummondii

Apr 15-30

1-2 wks

Jun 1

cover flats; can be sown outside in May

Poppy, opium

Papaver somniferum

Mar 15—Apr 1

1 wk

Jun 1

 

Poppy, Shirley

Papaver, rhoeas

Apr 15-30

1-2 wks

May 15

use peat pots

Portulaca

Portulaca grandiflora

Mar 15

1-2 wks

Jun 1

use peat pots; can be sown outside in May

Salpiglossis

Salpiglossis sinuata

Mar 15

2-3 wks

Jun 15

cover flat

Salvia

Salvia splendens

Mar 1

1-2 wks

Jun 1

do not cover seeds for 48 hrs

Snapdragon

Antirrhinum majus

Feb 15– Mar 1

1-2 wks

May 15

 

Statice

Limonium sinuatum

Mar 15-30

2-3 wks

Jun 1

 

Strawflower

Helichrysum bracteatum

Mar1-15

1-2 wks

Jun 1

do not cover seeds


Common Name

Bontanical Name

Seed Start date

Germination

Plant out date

Comments

Sun flower

Helianthus annuus

Apr 15-30

1-2 wks

Jun 1

usually sown outside in May

Swan River daisy

Brachycome iberidifolia

Apr 15-30

2-3 wks

Jun 1

 

Sweet alyssum

Lobularia maritima

Apr 15

1-2 wks

May 15

do not cover; can be sown outside in May

Verbena

Verbena hortensis

Feb 15-30

2-3 wks

Jun 1

difficult to grow from see cover flat

Viola

Viola cornuta

Mar 15-30

1-2 wks

May 15

cover flat; refrigerate 4-5 days

Zinnia

Zinnia elegans

May 1

1-2 wks

May 15

sow outside in May or use peat pots

Black-eyed Susan vine

Thunbergia alata

Apr 1-15

4 wks

Jun 1

do not cover

Canarybird vine

Tropaeolum peregrinum

May 1

1-2 wks

Jun 1

 

Cup-and-saucer vine

Cobaea scandens

Feb 1-15

2-3 wks

Jun 15

 

Morning glory

Ipomoea tricolor

Apr 15-30

1-2 wks

Jun 1

soak or scarify; use peat pots

Potato vine

Solanum jasminoides

May 1

1 wk

Jun 1

worth trying to obtain seeds

Scarlet runner bean

Phaseolus coccineus

Sow outside

1-2 wks

May 1-15

edible beans

Sweat pea

Lathyrus odoratus

Apr 15-30

2-3 wks

May 15

scarify; use peat pots; start outside late Apr