How to grow... Delphiniums

Delphiniums are known for their tall, striking spikes of colourful flowers, making them a favourite among gardeners for adding height and drama to borders and flower beds. Here's a step-by-step guide to help you grow antirrhinums successfully:

1. Location: Choose a sunny spot with fertile, well-draining soil. Delphiniums prefer slightly alkaline soil.

2. Soil: They prefer fertile, well-draining soil with a slightly alkaline pH. Adding organic matter such as compost can improve soil fertility and drainage.

3. Spacing: Space plants 30-60 cm (12-24 inches) apart, depending on the variety.

4. Watering: Delphiniums need consistent moisture, especially during dry periods. However, they do not like waterlogged soil, which can lead to root rot.

5. Staking: Tall delphiniums often need staking to support their flower spikes. Use bamboo canes or metal supports and tie the stems gently to the stakes.

6. Deadheading: Removing spent flower spikes can encourage a second flush of blooms. Cut back the flower stalks to the base after the flowers have faded.

7. Powdery Mildew: This fungal disease can affect delphiniums, especially in humid conditions. Ensure good air circulation and avoid overhead watering to reduce the risk.

8. Companion Planting: Delphiniums look stunning when paired with roses, peonies, and other perennials.

By following these steps, you should be able to grow beautiful, tall spikes of delphiniums in your UK garden. Enjoy the striking colours and impressive height they bring to your flower beds!

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