Chrysanthemum Ernst ('Yoernst')

• 
  RHS Plants for Pollinators plants

  This plant will provide nectar and pollen for bees and the many other types of pollinating insects.

  It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.

  • Garden Plants
  • Wildflowers
  • Plants of the World

Cultivation

Grow-on young plants starting in a 7.5cm pot in peat-free John Innes No2, potting them on until they have reached a pot size of 23-30cm. At this stage use peat-free JI No3 compost and bring the plants into a cool greenhouse in the autumn minimum 10°C where they are to flower. Water moderately throughout the growing season and feed weekly with a balanced liquid fertiliser

Propagation

Propagate by basal softwood cuttings from overwintered stools in late winter or early spring. Cuttings should be rooted in a peat-free compost the surface of which is covered with dry sand and kept in a temperature of 16°C. Place in a cold frame after first rooting and protect from frost. Harden off in mid spring. Established clumps may be propagated by division in spring.

Suggested planting locations and garden types

• City and courtyard gardens
• Coastal
• Cottage and informal garden
• Patio and container plants
• Flower borders and beds

Pruning

Cut back old stems to 5cm after the flowers have finished

Pests

May be susceptible to aphids, capsid bug, earwigs, eelworms, mealybugs glasshouse red spider mite and glasshouse whitefly

Diseases

May be susceptible to glasshouse grey mould, powdery mildews and chrysanthemum white rust