I found this information for Wedding Flower Availabilities and Colors  from About.com  , Martha Stewart weddingsthe Knot and I thought it would be helpful enough to re-publish here.  I see brides all the time having trouble picking colors for their wedding themes and dates, but still have no idea what types of flowers they want to use for there wedding.  Hope this helps….
Picking wedding flowers in season can save you a bunch of money. Sure, growers are now able to fly almost anything in from the other side of the world, but you’ll pay a premium for that. Here is a US guide to what flowers are generally in season to help you get started. Talk specifically to your florist or grower about what is available for your wedding flower ideas.
This chart can also help you decide when to get married. If you want huge amounts of different pink flowers, fall might not be the best time for you to get married. On the other hand, if adore zinnias and dahlias, perhaps you should have a fall wedding. Seasons depict the availability of certain floral types so do your due diligence and ask your florist whats in season before you set your date in stone.
Scroll down and see wedding flowers that are available year-round. Spring wedding flowers, Winter, Summer & Fall wedding flowers. Have fun looking. Also visit our pinterest site: Pinterest.com/renaissancepics/

Spring Wedding Flowers in Season

Anemone * Blue, red, pink, white * Jan-May and Aug-Dec.
Bells of Ireland * Green * January-October
Boronia * Pink * April-May
Casa Blanca Lily * White * January-October
Daffodil * Yellow * January-Early May
Delphinium * White, Blue * April- October
Hyacinth * Purple, Pink or White
Lilacs * Violet or White
Narcissus * White
Peony * Pink or White * Late Spring – Early Summer
Ranunculus * white, pink, red, orange and yellow * February-May
Star Gazer Lily * Pink and White * January-October
Sweetpea * white, pink, red/coral, and lavender/purple * December-May
Tulip * Many colors, including white, pink, yellow, red, and purple * December-April
Waxflower * pinky purple and white

Summer Wedding Flowers in Season

Alstromeria * orange, pink, yellow and cream, other colors
Bells of Ireland * Green * January-October
Chrysanthemum * White, Yellow, Orange, Pink, other colors
English Lavender * Purple
Forget-me-not * Blue
Freesia * White, Yellow, Pink, Blue, Purple
Gerbera Daisy * Pink, Yellow, Orange, Red, White
Hydrangea * White, Blue, Purple, Pink
Iris * Purple, Blue, White
Larkspur * White, Purple, Blue, Pink
Liatris * Pinkish Purple
Lily, asiatic * White, Pink, Yellow, Orange
Lily, oriental * White, Pink
Lisianthus * Purple, White, Pink
Matsumoto Asters * Pink, Purple
Monte Casino Asters * White, Purple
Queen Anne’s Lace * White
Snapdragons * Pink, Yellow, Orange, White, Other Colors
Solidaster * Yellow
Statice * Purple
Stephanotis * White
Stock * White, Other Colors
Sunflower * Yellow
Tuberose * White
Yarrow * White, Pink, Yellow
Zinnia * Red, Orange, Pink

A Pretty Pink Bouquet with a
Pop of Citrus

 

Fall Wedding Flowers

Aster * White, Pink
Chrysanthemum * White, Yellow, Orange, Pink, other colors
Dahlia * Many Colors
Marigold * Yellow, Orange, Red
Statice * Purple
Zinnia * Red, orange, pink *
Dried Leaves

Winter Wedding Flowers

Amaryllis * Red, White
Anemone * Blue, red, pink, white * Jan-May and Aug-Dec.
Bells of Ireland * Green * January-October
Camellias * White, Pink
Casa Blanca Lily * White * January-October
Cosmos * Pink, White, Brown, Other Colors
Daffodil * Yellow * January-Early May
Forget-me-nots * Blue
Holly * Green with Red Berries
Jasmine * White
Narcissus * White, Yellow
Poinsettia * Red, White
Ranunculus * white, pink, red, orange and yellow * February-May
Star Gazer Lily * Pink and White * January-October
Star of Bethlehem * White
Sweetpea * white, pink, red/coral, and lavender/purple * December-May
Tulip * Many colors, including white, pink, yellow, red, and purple * December-April
Waxflower * Pink, White

Wedding Flowers Available Year-Round

Baby’s Breath * White
Bachelor’s Button * White, Pink, Red or Blue
Calla Lily * White is widely available, other colors, available as well, particularly in mini size
Carnations * Many Colors
Delphinium * Blue, White, Purple
Eucalyptus * Blue, Silver
Gardenia * White
Gladiolus * Many Colors
Heather * Pink
Lily of the Valley * White and Pink
Orchid * Pink, White, Purple, Other Colors
Protea * Pink
Rose * Many Colors ***February at a premium
Scabiosa * Purple, White