They bloom earlier, brighter, and longer
Unlike the muted, mostly warm-toned perennials that sustain the autumn border, annual chrysanthemums are generally earlier and brighter, and flower longer.
You're likely to encounter two kinds, both native to the Mediterranean region and both recently renamed by taxonomists (the new designation follows the old in these descriptions).
Tricolor daisy (Chrysanthemum carinatum, now Glebionis carinatum) is a 1- to 3-foot-tall annual whose flowers have bright bands of color around dark centers.
OUR FAVORITES: Court Jesters mix comes in orange, rose, salmon, scarlet, white, and yellow. White Carinatum Dunnettii Choice mix has white, yellow, bronze, and crimson flowers. In 'German Flag', scarlet rays and a golden yellow band surround the central disk. Merry mix has multicolored bull's-eye flowers on 2- to 3-foot-tall plants. Single Annual mixed comes in yellow, pink, purple, and rust.
It's a shame crown daisy (Chrysanthemum coronarium, now Glebionis coronaria) had its botanical name changed, since the word chrysanthemum combines the Greek for gold (chrysos) and for flower (anthos)―a perfect description for this lovely annual, which usually has yellow petal-like rays and a yellow central disk. Flowers can be single or double.