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…
Cultivation
They are fully to half hardy. Most species will prefer sun, but some do better in the shade. They will grow in any but waterlogged soil. Outdoors, grow larger species and hybrids in any moderately fertile, well-drained soil. Grow small species and hybrids in humus-rich, sharply drained soil in full sun. Under glass, grow half hardy species in loam-based potting compost with added sharp sand, in bright filtered light. During the growing season, water freely and apply a balanced liquid fertilizer monthly. Water sparingly in winter.
Propagation
You can propagate by semi-ripe cuttings in the summer, or by seeds or division in the autumn or spring. The cultivars should be propagated by division or cuttings only.
Pests, diseases or disorders
Vine weevil, capsid bug, sawflies, downy mildew and powdery mildews.
