The following flowers are available during May:

Allium
Birds of Paradise
Boronia
Callas
Calycina
Campanula
Craspedia
Daffodils
Dahlias
Delphinium
Godetia
Heather
Hyacinth
Hydrangea
Hypericum
Lavendar
Lilac
Muscari
Peonies
Poppies
Orchids
Safflower
Scabiosa
Star of Bethlehem
Sterling Range
Sunflowers
Sweet Peas
Trachelium
Tulips
Vibernum
Waxflower
Yarrow