It's really really hot! Here's how to conserve water. Avoid digging! In hot dry weather, keep tilling the soil to a minimum, as this causes water…
They usually frost hardy and will grow best in a rich, well-drained, sandy soil in an open, sunny situation, and they will tolerate dry conditions.
You can propagate from seeds or by division in spring or autumn, or from softwood cuttings in late spring.
Pests, diseases or disorders
Prone to slugs, leaf spot and mildew. Root rot in wet, heavy soil.