This old favorite is of easy culture and not particular as to soil. Of course, it shows finer flowers and remains longer in bloom when given good rich soil than when a poor soil is used. The annual sorts are raised from seeds sown either in September or October, or in February or March. The seeds should be sown where they are to flower, and covered to the depth of an eighth of an inch, the seedlings, when two inches high, being thinned out to six inches apart each way. The perennial species, in addition to being propagated by seeds, may be increased by cuttings placed in a cold frame in October or November or by division of the roots in February or March.