There are special flowers for each anniversary, but the most important factor is that you send something from the heart. The first year features carnations, to represent young and passionate love. For the second year, Cosmos are traditional. For your third anniversary, try sunflowers, Geraniums are traditional for the fourth, daisies are classic for the fifth year, daffodils are fabulous for a 10th anniversary, roses are traditional for the 15th anniversary, for the 20th anniversary, asters are in favor, Iris are great for the 25th anniversary, lilies are fabulous for the 30th anniversary, for your 40th try Gladiolas, and on a 50th anniversary, try yellow roses and violets. Each flower represents love, growing together, strength, or stability.