How to plant aconites
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- 17 Feb 2020
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Aconites, also known as monkshoods or devil’s helmets, are striking hardy perennials that bring height, structure, and bold colour to garden borders. These tall, herbaceous plants produce unique, hooded flowers in rich shades of blue and purple, standing proudly above deep green, finely cut foliage. Despite their delicate appearance, aconites are incredibly resilient, thriving in cooler climates and naturalising beautifully in woodland settings.
Native to mountainous regions of Europe and Asia, aconites are an excellent choice for the middle or back of the border. They are particularly well-suited to cottage gardens, woodland gardens, and mixed perennial beds. For an eye-catching display, try pairing them with euphorbias, heleniums, rudbeckias, or ornamental grasses. They also make striking cut flowers for floral arrangements.
How to Grow Aconites
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Soil & Position – Aconites prefer moist, fertile, well-drained soil in partial shade, though they can tolerate most soil types and sunnier locations if adequate moisture is provided.
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Planting & Care – Plant in a sheltered spot, away from strong winds. Water regularly during dry periods and apply mulch in autumn to help retain moisture and improve soil quality.
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Support & Maintenance – Taller varieties may require staking to prevent them from flopping. Deadhead spent flowers to encourage prolonged blooming and cut back foliage in late autumn after flowering has finished.
Important Safety Information
⚠️ Aconites are highly toxic if ingested and can cause skin irritation upon contact. Always wear gloves when handling, planting, or pruning, and keep them out of reach of pets and children.
Common Problems, Pests, and Diseases
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Aphids – These sap-sucking insects can weaken plants and spread viruses. Remove infestations manually or encourage natural predators such as ladybirds.
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Fungal Stem Rot – A soil-borne fungus that causes wilting and yellowing foliage. Improve drainage and airflow to prevent infection.
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Powdery Mildew – A white, powdery fungal coating on leaves, often due to poor air circulation or excessive shade. Remove affected foliage and disinfect tools after use.
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Verticillium Wilt – A serious fungal disease causing yellowing leaves, dieback, and plant wilting. Infected plants should be removed and destroyed immediately, and contaminated soil replaced.
Supplied as Bare-Root Perennials
At Peter Nyssen, we supply aconites as bare-root perennials. Unpack and plant immediately upon arrival to ensure they are established successfully. Planting in pots until it is established will improve the chances of a long living plant.
By incorporating aconites into your garden, you’ll create stunning vertical interest, attract pollinators, and enjoy their long-lasting floral displays year after year.
READ MORE ABOUT HARDY PERENNIALS