Lambs ear, known botanically as Stachys byzantina, is one of the most beloved perennials for sensory gardens, children’s spaces, and low-maintenance landscapes. Its thick, velvety, silver-gray leaves are famously soft to the touch, and its ability to act as a vigorous groundcover makes it a favorite for gardeners looking to fill space with texture and charm. Fortunately, if you already have one of these fuzzy plants in your yard, you don’t need to head to the nursery to get more. Learning how to propagate lambs ears is a straightforward process that even beginner gardeners can master. Whether you want to expand your borders, share plants with friends, or revitalize an older patch that has become thin in the center, there are several reliable methods to choose from.
Understanding the Growth Habits of Stachys Byzantina
Before diving into the “how-to,” it is helpful to understand how this plant naturally grows. Lambs ear is a rhizomatous perennial, meaning it spreads through underground stems. Over time, a single plant will form a dense mat of foliage. In late spring or early summer, many varieties send up tall, woolly flower spikes with small purple or pink blossoms that are a magnet for bees and butterflies. Because of its spreading nature, lambs ear eventually crowds itself out. This leads to a common issue where the center of the plant dies back or becomes “woody,” while the new growth continues to push outward. This is a natural signal that it is time to propagate and rejuvenate your plants.
The Most Efficient Method: Propagation by Division
Division is widely considered the best way to propagate lambs ears. It is fast, has an incredibly high success rate, and solves the problem of center-dieback in older specimens. By splitting a mature clump, you essentially create several “new” plants that already have established root systems and foliage.
When to Divide Your Plants
The ideal time for division is in the early spring, just as the new growth begins to emerge but before the summer heat sets in. This allows the new sections to establish their roots in the soil while the weather is mild. You can also divide lambs ears in the early fall, provided you give the plants at least six weeks to root before the first hard frost of winter.
Step-by-Step Guide to Division
To start the process, select a healthy, mature clump of lambs ear that is at least two or three years old. You will need a clean shovel or a garden fork.
- Digging Up the Clump: Gently insert your shovel into the soil around the perimeter of the plant, about six inches away from the leaves. Lift the entire root ball out of the ground. Don’t worry if the plant seems large; lambs ears are resilient.
- Inspecting the Roots: Shake off excess soil so you can see the root structure and the individual rosettes of leaves. You are looking for healthy, white roots and vibrant green growth.
- Separating the Sections: Using your hands, a soil knife, or even a sharp spade, pull the clump apart into smaller sections. Each division should be about the size of a fist and must have at least one healthy rosette of leaves and a substantial portion of the root system attached.
- Cleaning the Divisions: This is the perfect time to pull away any brown, dead, or mushy leaves from the base of the new sections. Removing old growth helps prevent rot and focuses the plant’s energy on new development.
- Replanting: Dig holes for your new plants that are twice as wide as the root system but no deeper. Place the division in the hole so that the crown—the point where the leaves meet the roots—is level with the soil surface. Space your new plants at least 12 to 18 inches apart to ensure good air circulation.
Growing Lambs Ear from Stem Cuttings
While division is the standard, you can also propagate lambs ears from stem cuttings. This is a great option if you want to create many small plants from a single parent or if you don’t want to dig up your entire garden bed.
Preparing the Cuttings
The best time to take cuttings is during the active growing season in late spring or summer. Focus on non-flowering stems, as these have more energy for root production rather than seed production.
- Taking the Cut: Use sterilized pruning shears to cut a 3 to 4 inch section of a healthy stem. Make the cut just below a leaf node (the point where leaves emerge from the stem).
- Stripping the Leaves: Remove the leaves from the bottom half of the cutting. This prevents the foliage from rotting when buried in the soil and exposes the nodes where new roots will form.
- Using Rooting Hormone: While not strictly necessary because lambs ear roots easily, dipping the cut end into rooting hormone powder can speed up the process and protect against soil-borne pathogens.
- Potting Up: Fill a small pot with a well-draining, sterile potting mix—a blend of peat and perlite works well. Insert the cutting into the mix and firm it down so it stays upright.
- Environment and Care: Place the pot in a warm spot with bright, indirect light. Avoid direct afternoon sun, which can scorch the soft leaves. Keep the soil slightly moist but never soggy. In about four to six weeks, you can gently tug on the cutting; if you feel resistance, roots have successfully formed.
Starting Lambs Ear from Seed
If you have plenty of patience and want to produce a massive number of plants on a budget, seed propagation is the way to go. However, keep in mind that certain cultivars, like the popular “Helen von Stein” or “Silver Carpet,” are grown specifically for their foliage and may produce few to no seeds, or may not grow true to the parent plant from seed.
Sowing the Seeds Indoors
To get a head start, sow seeds indoors about 8 to 10 weeks before the last expected frost.
- Soil and Sowing: Use a standard seed-starting mix. Scatter the seeds over the surface and press them down gently to ensure good contact with the soil. Lambs ear seeds require light to germinate, so do not cover them with a thick layer of soil—a very light dusting of vermiculite or fine sand is plenty.
- Heat and Light: Place the seed tray on a germination mat or in a warm room. Temperatures should ideally be around 70 degrees Fahrenheit for optimal germination. Use a grow light or place the tray in a very sunny south-facing window.
- Germination and Thinning: Germination can be slow and irregular, sometimes taking anywhere from 14 to 30 days. Once the seedlings have two sets of “true” leaves (the fuzzy ones), you can thin them or transplant them into individual pots.
- Hardening Off: Before planting your lab-grown babies into the garden, they must be hardened off. Gradually expose them to outdoor conditions over a period of 7 to 10 days to prevent transplant shock.
Essential Care for Newly Propagated Plants
Success doesn’t end once the plant is in the dirt. The first few weeks are critical for the survival of your new lambs ears. Unlike established plants, which are remarkably drought-tolerant, young divisions and cuttings need consistent moisture to help their roots take hold.
Water your new plants once or twice a week, depending on the heat. The most important rule is to water at the base of the plant. The “fur” on the leaves is designed to trap moisture in dry climates, but in a garden setting, it can trap water and lead to fungal diseases like powdery mildew or rot. If the leaves stay wet for too long, they will turn brown and mushy.
Ensure your planting site has excellent drainage. Lambs ear “hates wet feet.” If your soil is heavy clay, amend it with compost or grit before planting. Once the plants show signs of new growth, they are established and can handle much drier conditions. In fact, established lambs ear can often survive on rainwater alone in many climates.
Managing Your New Groundcover
Once your propagated plants begin to spread, maintenance is minimal. Every spring, rake away the dead, withered leaves from the previous winter to make room for new growth. If you find the plant is spreading too aggressively, simply dig up the encroaching edges and—you guessed it—start the propagation process over again to gift the extras to your neighbors.
Frequently Asked Questions
- Can I propagate lambs ear in water?
While some plants thrive in water propagation, lambs ear is not a good candidate. The hairy, velvety leaves and stems are highly susceptible to rotting when exposed to high humidity and standing water. It is much more effective to use the soil-based stem cutting method or division.
- Why is the center of my lambs ear plant dying?
This is a natural occurrence as the plant ages. The central part of the clump becomes overcrowded and lacks sufficient airflow and light, causing the older rhizomes to die off while the plant continues to grow outward. When this happens, it is the perfect time to divide the plant and replant the healthy outer sections.
- What is the best temperature for growing lambs ear seedlings?
For indoor seed starting, aim for a consistent room temperature between 65 degrees Fahrenheit and 75 degrees Fahrenheit. Once the plants are established in the garden, they are very hardy and can withstand winter temperatures as low as 0 degrees Fahrenheit or even lower, depending on the specific variety and USDA zone.
- Do I need to fertilize my newly propagated lambs ears?
Generally, no. Lambs ear actually prefers “poor” soil. Over-fertilizing, especially with high-nitrogen products, can lead to leggy growth and make the plant more susceptible to disease. A light application of compost in the spring is more than enough to keep them healthy.
- How do I stop my lambs ear from spreading too much?
The best way to control the spread is through “deadheading“—cutting off the flower spikes before they drop seeds—and by manually removing the creeping rhizomes at the edge of the patch. Because they root so easily, any piece of root left behind may grow into a new plant, so be thorough when thinning them out.