I wrote recently about watering during an extended hot spell, and while working today I was…
Grow in a sunny, sheltered position. Protect from winter wet with a autumn mulch of well-rotted organic material.
You can propagate by seed in autumn or spring or by softwood or semi-ripe cuttings of non-flowering shoots in mid-summer. Propagate cultivars by cuttings.
Pests, diseases or disorders
Slugs, snails, chrysanthemum eelworms and downy mildew.