As the warmer weather approaches, many people are looking forward to spending time in their gardens. Whether you are working to make your garden beautiful or simply enjoying time sitting outside, spending time outdoors can have a big boost to your health. However, a garden expert is warning that having the wrong plants in your garden can have the opposite effect – both on your health and your wallet. Some invasive species not only grow quickly but can wreak havoc on your home and spread into neighboring properties, leaving homeowners facing hefty bills. Additionally, some of these plants can cause irritation, burns, blisters, and even blindness if they come into contact with your skin or eyes.
London rubbish removal firm Rainbow Rubbish Removals has identified five of the biggest offending plants and six more to watch out for. Here’s a breakdown of the five biggest offenders, the harm they can cause, and how to get rid of them:
1. Giant Hogweed (Heracleum mantegazzianum)
Giant hogweed is the most dangerous invasive species in the UK, growing taller than 10 feet. While it may look pretty, it poses a significant risk to individuals unaware of its harmful effects. Exposure to the sap can result in skin burns, rashes, blisters, and even potential blindness if it comes into contact with the eyes. To remove giant hogweed from your garden, focus on preventing seed formation to stop its spread. Always wear protective gear when handling the plant and cut it just below the growing point underground. If needed, apply herbicide at the start of the growing season in May.
2. Japanese Knotweed (Fallopia japonica)
Japanese knotweed is a fast-spreading weed that can grow over 7 feet tall, suppressing other plant growth in your garden. It can also penetrate pavements and house foundations, reducing the value of your home by up to 20%. Seeking professional assistance is advisable for the removal of this invasive plant. However, if you choose to tackle it yourself, you can spray or inject the stems with approved herbicides. Repeated applications may be necessary, and it typically takes a minimum of three years to effectively treat the knotweed.
3. Poison Hemlock (Conium maculatum)
Poison hemlock is a highly toxic plant that can grow up to 6-10 feet in height. It is infamous for its deadly poison, affecting the nervous system and often proving fatal if ingested. To remove poison hemlock, always wear protective clothing when handling the plant. Dig out the whole plant, including the long taproot, or use glyphosate treatment to eradicate it. Wash your hands thoroughly after bagging up the plant for removal and continue to monitor the area for seedling growth.
4. Chinese Wisteria (Wisteria sinensis)
Chinese wisteria is a climbing vine known for its beautiful cascades of fragrant purple flowers. However, its rapid growth and ability to smother other plants make it a nuisance in gardens. It can strangle and kill trees and shrubs, cause structural damage by growing into buildings, and de-value your home. To remove invasive wisteria safely, cut the vines close to the root and apply glyphosate or garlon to the cut stem. Dispose of cut vines properly or trim regularly until autumn to prevent regrowth.
5. Green Alkanet (Pentaglottis sempervirens)
Green alkanet is an invasive perennial with clusters of small blue flowers and rough, hairy leaves. Despite its attractive appearance, it can quickly spread and dominate garden beds, crowding out desirable plants. To remove green alkanet, pull or fork out seedlings from loose soil, ensuring you remove all roots. Keep an eye out for new seedlings near existing clumps and dig out established plants with a border fork or spade. Smothering plants with cardboard and thick organic matter or using biodegradable mulch matting can also be effective.
In addition to these five offenders, there are six more invasive species to watch out for and prepare to remove, including Rhododendron, Norway Maple Tree, Himalayan Balsam, English Ivy, Bugleweed, and Russian Vine. By being aware of these invasive plants and taking steps to remove them from your garden, you can protect your health, your home, and the environment. Remember to always wear protective gear when handling these plants and consult with professionals if needed for safe and effective removal.