Anniversary gifts follow different themes based on the number of years, and the same goes for different flowers. Of course, these are just suggestions and it's best to first follow personal preference. Here’s a breakdown of the major anniversaries and associated flowers: 1st: Carnation 5th: Daisy 10th: Daffodil 15th: Rose 20th: Aster 25th: Iris 30th: Lily 50th: Yellow roses and violet