How to Grow Chrysanthemums in the UK

A Complete Guide to Cultivating Chrysanthemums in British Gardens

December 11, 2024 | 10 min read
Colourful chrysanthemums blooming in a garden

Chrysanthemums, often affectionately called 'mums', are a staple in many British gardens, including my own here in Staffordshire. Their vibrant colours and varied forms bring life to any space from late summer to autumn.

Quick Answer

To grow chrysanthemums in the UK, plant them in well-drained soil, provide full sun, and water them regularly. Pinching back stems encourages bushier growth and more blooms.

Choosing the Right Variety

Chrysanthemums come in various shapes and sizes, making them suitable for different garden styles. Consider the following when choosing your variety:

  • Choose hardy varieties for colder Midlands winters.
  • Select colours that complement your existing garden palette.
  • Opt for late-blooming types for autumn displays.

Planting Chrysanthemums

In the UK, the best time to plant chrysanthemums is in the spring after the last frost. This gives the plants enough time to establish before winter. Here's a simple guide:

Month Task Details
March-April Planting Plant in well-draining soil and full sun.
May-June Pinching Pinch back stems to encourage bushier growth.
July-August Watering Ensure consistent watering during dry spells.

Caring for Your Chrysanthemums

Once planted, chrysanthemums require consistent care to thrive. Here are my tips for maintaining healthy plants:

  • Water regularly, especially in dry periods, to keep the soil moist but not waterlogged.
  • Feed with a balanced fertiliser every few weeks during the growing season.
  • Remove dead flowers to promote further blooming.

Dealing with Common Pests and Diseases

Chrysanthemums can be prone to pests like aphids and diseases such as powdery mildew. Regular monitoring is key:

  • Inspect leaves regularly for signs of pests and treat with insecticidal soap if needed.
  • Ensure good air circulation around plants to prevent fungal diseases.
  • Remove any infected leaves promptly to stop the spread of disease.

Preparing for Winter

In the Midlands, winters can be harsh on chrysanthemums. To protect them, cut back plants to about 15cm after flowering and mulch heavily to insulate the roots. In particularly cold areas, consider lifting and storing them indoors until spring.

Frequently Asked Questions

When is the best time to plant chrysanthemums in the UK?

The ideal time to plant chrysanthemums is in the spring, from March to April, once the risk of frost has passed.

How can I encourage more blooms on my chrysanthemums?

Regularly pinch back the stems during the growing season to promote bushier growth and more blooms.

What should I do if my chrysanthemums get powdery mildew?

Ensure good air circulation, avoid overhead watering, and remove any affected leaves. Using a fungicide can help control severe cases.

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