A list of flowers for birthday months is available at WhatsMyBirthdayFlower.com and Teleflora.com. WhatsMyBirthdayFlower.com hosts a full list of flowers for each month that includes carnations for January, violets or irises for February, daffodils for March, sweet peas or daisies for April, and lilies for May.
Each month’s flower has a detailed description including the derivation of the flower’s name, color varieties, cultivation and hidden messages when giving it. As an example, giving the daffodil, March's flower, sends the message “You are an angel.”
Teleflora.com lists a meaning for each birth month flower. January carnations symbolize pride, beauty and admiration, whereas April daisies exemplify innocence. This site also provides the wedding anniversary associated with various flower types.