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Variegated yellow archangel (Lamiastrum galeobdolon argentatum) is a herbaceous perennial plant which belongs to the mint family. This species’ origins are unknown, but we do know that the plant was introduced to the UK as an ornamental.
Like most non-native invasive plants, Variegated yellow archangel thrives in many soil types and climates, however it prefers partial shade. Once established, it quickly becomes resilient to drought. While generally robust and undemanding, it may attract pests like slugs and snails. Beyond its ornamental value, Variegated yellow archangel is reputed for its medicinal benefits, traditionally applied to treat diverse ailments. However, there is no credible scientific evidence of the plant’s efficacy.
Being a member of the mint family, Variegated yellow archangel has many of the family’s characteristics. Small, serrated leaves, green stems and a fleshy, shallow root system that is incredibly easy to propagate.
Variegated yellow archangel leaves: The plant is most easily identified by its variegated (two-toned) silver and green heart-shaped leaves, which distinguishes it from its native counterpart Yellow Archangel, and other garden plants in the same family as lemon balm (Melissa officinalis). The leaves grow in opposing pairs up the stem and have toothed edges.
Variegated yellow archangel flowers: From late spring to early autumn, Variegated yellow archangel has small, hooded yellow flowers that grow from the stem.
Variegated yellow archangel roots: Like many of its minty family, the roots of Variegated yellow archangel spread quickly, via fleshy runners that grow just below the soil surface, and root at the nodes. These runners are extremely productive and can spread quickly to colonise an area. Like many rhizomatous plants, they also survive as fragments, which is why the plant is easily spread through gardening practices.
Yes, Variegated yellow archangel is considered an invasive species and has become a problem in the UK, which is why the plant is currently listed under Schedule 9 of the Wildlife and Countryside Act in England and Wales, meaning it is an offence to plant or otherwise cause to grow this species in the wild.
The invasive characteristics of Variegated yellow archangel include rapid spread via garden waste, fly-tipping and movement of infested soils.
The plant roots from stem fragments and grows in shady locations (woodland and hedges), where it can dominate the understory layer at the expense of native plants.
When growing in the wild, Variegated yellow archangel becomes invasive, forming dense patches and outcompeting native plant species, preventing native resources forming.
Yellow archangel is a native woodland plant, with the variegated subspecies being the non-native import. Yellow archangel is common through woodland in the UK, appearing in spring, and growing to around 45cm in height. The plant resembles stinging nettle, with hairy serrated leaves, but has yellow, hooded flowers.
Variegated yellow archangel usually has a more creeping habit and is smaller in stature than native yellow archangel. However, the obvious difference between the two is the colouration of the leaves. Variegated yellow archangel has a striking silver pattern, whereas our native variety has solid green leaves. Both are serrated, share angled stems, and have yellow flowers.
With Autumn and Winter bringing colder temperatures, the plant goes into dormancy and its growth will start to slowdown.
However, throughout the year, the plant remains easily identifiable due to its evergreen silver and green leaves. These leaves, arranged in opposing pairs reminiscent of wings, contribute to its name “archangel” and feature toothed edges.
Square stems, a characteristic common to most mint family plants, are also present. The plant is characterised by rough hairs covering its surface and emits a distinctive scent.
The growth cycle of Variegated yellow archangel typically follows these stages:
Absolutely!
Variegated yellow archangel is a tough plant that can grow almost anywhere, regardless of soil type or weather conditions. Because the plant is so resilient, it outcompetes native plants, which can upset the balance of our ecosystem. It takes up space, making it harder for other native plants and animals to get the resources they need. Because there aren’t any natural enemies to keep it in check, the plant is hard to control.
This is why the plant is listed on Schedule 9 of the Wildlife and Countryside Act in England and Wales, meaning it is an offence to plant or otherwise cause to grow this species in the wild.
Find out more by visiting our Variegated yellow archangel removal page.
Rest assured, where invasive species are identified at an early stage and tackled correctly, problems can usually be avoided. Our specialist consultants complete thorough surveys to identify the extent of the problem. Our plans aren’t one-size-fits-all; they’re customised to tackle the invasive species at your property effectively, taking account of all of your requirements.
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