Check out this extensive list of your favorite flowers, It can help you make decisions as to what to use in your bouquets and your table pieces.

Spring
Columbine, dogwood, hyacinth, lilac, lily of the valley, mophead hydrangea, pear, peony, tulip, cherry blossom, crab-apple blossom, daffodil, forsythia, lilac, lily of the valley, peony, tulip, viburnum, freesia, pansy, poppy, ranunculus, rose, tulip, violet,  dogwood, forsythia, foxglove, herbs, larkspur, magnolia, peach, pear, plum, rose, spirea, sweet pea, wisteria

Summer
Asiatic lily, black-eyed Susan, cosmos, delphinium, larkspur, pee gee hydrangea, clematis, cosmos, cockscomb, daisy, garden roses, hydrangea, rudbeckia, sunflower, viburnum, begonia, delphinium, gardenia, hydrangea, pansy, poppy,  violet, aster, cosmos pee gee hydrangea, plumbago, rose, rosemary, sunflower, zinnia

Fall
Amaryllis, bittersweet, crab apple, hydrangea, ornamental berries, rose, sugar maple, sunflower
Autumn foliage, crab apple, dahlias, ornamental berries, rose hip, rose, scabiosa
Chrysanthemum, cosmos, coreopsis, Gerber daisy, hydrangea, lisianthius, pomegranate, rose, Bittersweet, galax, hydrangea, ornamental berries, rose, salvia, sassafras, sumac

Winter
Dried flowers, evergreens, Amaryllis, ornamental berries, seedpods, acacia, evergreens, forsythia, fruit blossoms, paper-whites, seeded eucalyptus, tulip
Evergreens, hydrangea, rose, Ranunculus and Anemone show up quite early as well

These flowers come at odd times-some are here year round:
Anemone, Arianrose, calla lily, Casablanca lily, Champagne rose, forced bulbs, freesia, gardenia, ivies, lily of the valley, Message rose, ranunculus, Sarracenia (pitcher plant), Stargazer lily, stephanotis, vines, Virginia rose, white dendrobium orchid