“Phew, what a scorcher!” Remember the summer of 76? It didn't rain between March and September, there were hosepipe bans, and water had to be collected from…
Can be given the 'Chelsea Chop' in late May to encourage more compact growth. Staking may be necessary.
You can propagate the perennials, the sub-shrubs and shrubs by softwood cuttings of non-flowering shoots or by division from spring to mid-summer. Or you can grow from seed sown in autumn or spring.
Pests, diseases or disorders
Slugs, snails, vine weevil and root rot.