The flowers that last the longest, particularly as cut flowers in a vase, are Laceleaf (Anthurium), which can last up to 42 days, and Chrysanthemums, which can last around 28 days. For garden plants that bloom until the very end of the season, Erysimum 'Bowles Mauve', Geranium 'Rozanne', and Erigeron (fleabane) are known to flower until the first frost