The Platycodon ΅Sentimental Blue Balloon Flower¦, Platycodon grandiflorum, is a low growing perennial with blue, balloon like flowers that bloom in late May until August. (The flowers should be deadheaded to increase bloom time.) Use ΅Sentimental Blue¦ as a cut flower, as a border in a perennial garden or with Cerastium ΅Snow in Summer¦. Platycodon is pest resistant and needs very little care. It is late to come up in the spring, so make sure to mark its location.