Yes, lamb's ear plant spread is real and steady. Your plants will send out stems that root where they touch the ground and create new rosettes each year. But lamb's ear is not classified as invasive and you can control it with very little work. It spreads at a pace that's easy to manage in any size garden.
A lot of gardeners ask is lamb's ear invasive before they plant it. I asked the same thing years ago. The answer is no. It spreads by runners, not by aggressive self-seeding like true invasive plants do. I planted three small starts along my front path and they filled a 3-foot (1-meter) wide strip within two seasons. The growth was quick but never out of hand. The runners pull right out of the soil if they go where you don't want them.
When I first noticed is lamb's ear invasive coming up in garden forums, I wanted to set the record straight. My clumps have never jumped into lawn areas or choked out other plants nearby. They grow outward in a slow circle and stop when they hit competition from stronger root systems. You stay in control the whole time with just a few minutes of pulling each spring.
Here's how the spreading works. Your lamb's ear sends out flat stems along the ground surface. Where those stems touch moist soil, tiny roots form at the nodes. Each rooted node grows into a new rosette of fuzzy silver leaves. Over time, these rosettes link together and form the thick mats that make lamb's ear such a great ground cover. The colony grows outward by about 6 to 12 inches (15 to 30 cm) per year in good conditions.
NC State Extension notes that you should divide your lamb's ear every 2 to 4 years because of this spreading habit. The centers of old clumps can die out while the edges keep growing. Dividing gives you fresh healthy plants and controls the size of each patch at the same time. You also get free plants to use in other parts of your garden or share with friends.
Controlling lamb's ear spread is simple and you have three good options. First, you can pull runners by hand in early spring when new growth starts. The stems snap off clean and the job takes 5 minutes per patch. Second, you can install a short root barrier about 4 inches (10 cm) deep around the edge of your planting area. This stops runners from crossing into spaces where you don't want them. Third, you can choose the Cotton Boll cultivar which doesn't set seed and spreads slower than the standard type.
Controlling lamb's ear spread should never stress you out. This plant wants to fill your garden with silver and that's a good thing in most cases. Just keep an eye on the edges once or twice a year and pull back any runners that wander too far. You'll spend more time enjoying the look of your lamb's ear than you ever will managing how far it goes. My neighbor gave up on a patch of English ivy because it ate her whole flower bed. She replaced it with lamb's ear and loves how it stays where she puts it with just a quick trim once a year. If you've dealt with true invasive ground covers before, lamb's ear will feel like a dream to manage. The spreading adds value to your garden without creating headaches down the road.
Read the full article: Lamb's Ear Plant Care and Growing Guide
