I planted this last year and, probably because of the mild winter, it is flowering prolifically. I don't know if this is usual or even desirable as I planted…
Grow them in full sun or partial-shade in moist but well-drained, fertile soil. You can propagate from seed or cuttings.
You can propagate by seeds in the spring or by greenwood cuttings in the summer.
Pests, diseases or disorders
Red spider mite may be troublesome.