Lamb’s Ear (Stachys byzantina) can be considered an invasive plant in North America. While they are easy to plant and care for, their self-seeding nature and creeping stems can cause them to spread rapidly and potentially take over an area if not properly managed.
Lamb’s Ear has a tendency to produce numerous small, fuzzy flowers on tall stalks. These flowers eventually form seeds that can be easily dispersed by wind, animals, or even by brushing against the plant. This means that if left unchecked, Lamb’s Ear can quickly populate an area with new seedlings, creating a dense stand of plants.
In addition to their prolific self-seeding, Lamb’s Ear also has creeping stems that have the ability to root once they come into contact with soil. This means that any stems that touch the ground can potentially establish new plants, leading to a spreading and invasive growth habit.
To prevent Lamb’s Ear from becoming invasive, it is important to deadhead or prune the flowers before they have a chance to set seed. By removing the spent flower stalks, you can prevent the plant from dispersing seeds and reduce the chances of new seedlings popping up in unwanted areas.
Regular deadheading not only helps to prevent the spread of Lamb’s Ear but also encourages the plant to put more energy into producing new foliage rather than producing seeds. This can help maintain a compact and tidy appearance for the plant.
In terms of management, it is also important to keep an eye out for any creeping stems that may be rooting in neighboring areas. If you notice any stems touching the ground and potentially rooting, simply cut them back to prevent the establishment of new plants.
While Lamb’s Ear can be invasive, it is worth noting that its invasiveness tends to be more of a concern in areas with favorable growing conditions and mild climates. In colder regions, Lamb’s Ear may not spread as aggressively due to shorter growing seasons and harsher conditions.
By practicing regular deadheading and monitoring for any creeping stems, you can help prevent Lamb’s Ear from becoming invasive and maintain its presence in your garden in a more controlled manner.
