It has been described as the ‘biggest threat’
Gardeners are being urged to check their patches as invasive bluebells are spreading rapidly across the UK and threatening the future of the nation’s native blooms. Plant experts at GardeningExpress.co.uk warn that many homeowners may already have the invasive Spanish bluebell plants growing in their gardens – but they can quickly take over and outcompete native English bluebells.
Spanish bluebells were originally introduced as ornamental garden plants, but their ability to spread aggressively means they are now one of the biggest threats to native bluebells. They grow faster, produce more seeds and easily hybridise with native varieties, creating crossbreeds that dilute the UK’s iconic woodland flower.
Native bluebells are a protected species and a vital part of the UK’s natural heritage, but once Spanish bluebells escape gardens, they can spread into nearby countryside and woodlands, making gardens a key battleground in protecting the native species. Experts say many gardeners are unintentionally helping the problem grow, often because they don’t realise the difference between the two plants.
With bluebell season underway, homeowners are now being urged to learn how to identify Spanish bluebells in case they need to take action in their gardens. Spanish bluebells grow upright, with flowers all around the stem, whereas native bluebells droop to one side in a curved shape.
The Spanish varieties are often pale blue or lilac, and can sometimes appear pink or white, while native bluebells are usually deep violet-blue. There are also differences in scent and foliage – native bluebells have a strong, sweet fragrance, whereas Spanish bluebells have little to no scent and their leaves are broader and thicker compared with the narrow leaves of native plants.
Spanish bluebells are not on the government’s list of invasive plants in England and Wales. However, they are considered an invasive non-native plant in Northern Ireland and the Republic of Ireland, while in Scotland, it is an offence to plant any non-native plant in the wild.
Chris Bonnett, plant expert and founder of Gardening Express, said: “Spanish bluebells can spread more easily than our native species, so gardeners need to be aware of how quickly they can multiply. “The biggest risk comes from gardens, where they may be planted for their beauty but can spread beyond boundaries through seeds, bulbs and garden waste if left unchecked.
“Gardeners play a crucial role in protecting native bluebells. Even a single garden population can establish in surrounding areas within a few years, so early identification and careful management can make a big difference.”
Five tips to help homeowners control Spanish bluebells in their gardens:
Dig up bulbs carefully
Spanish bluebells spread through underground bulbs, so removing the entire bulb is essential to controlling the plant.
Dispose of plants properly
Never compost them or dump garden waste in the countryside. Bag plants and dispose of them via general waste.
Avoid planting or sharing bulbs
Even giving bulbs to friends or neighbours can spread the invasive species further afield.
Monitor your garden each spring
New plants can regrow from missed bulbs or seeds.
Choose native alternatives
Plant native bluebells or other UK-friendly spring flowers instead.
You must be logged in to post a comment Login