Yes, but starting a lilac bush from a cutting has a low success rate and requires 6 to 8 weeks for roots to form; propagation from lilac suckers is far more reliable and faster.
Taking a cutting from a beloved lilac is a natural instinct—clip a piece of the old bush and grow a new one. For most gardeners, that instinct meets frustration. Lilacs are among the harder shrubs to root from stem cuttings, with success rates often below 50% even with careful technique. The right method, timing, and a bottle of rooting hormone can tip the odds in your favor. This guide covers when to take each cutting type, the exact step-by-step process, and why digging up a sucker from the base of the plant is almost always the better move.
When To Take Lilac Cuttings: Softwood vs. Hardwood
Lilac cuttings succeed or fail on timing alone. Softwood cuttings, taken from fresh green growth, are the standard route and root fastest. Hardwood cuttings, taken from leafless dormant wood, are slower but work when you missed the softwood window.
- Softwood cuttings: Late spring or early summer, after the bush finishes blooming but while stems are still bending easily and green. This is the window most guides target.
- Hardwood cuttings: Late fall or winter, after the leaves drop and the plant is fully dormant. Expect several months before roots appear.
Whichever type you choose, take cuttings in the morning when the plant is most hydrated. Snip 4 to 6 inches from the tip of a branch that grew this season—soft, green, and pencil-thin. Woody brown stems from older growth rarely root.
How To Start a Lilac Bush From a Cutting: Step by Step
Follow this exact sequence. Skipping a step—especially the pre-made hole for the stem—can wipe off the rooting hormone and drop your success rate near zero.
- Prepare the cutting. Strip off all the lower leaves so the bottom node is bare. Keep one to two pairs of leaves at the top. If those top leaves are large, trim them in half with scissors to reduce water loss.
- Score and dip. Use a clean knife to scrape a thin strip of bark off the bottom inch of the stem, exposing the green layer underneath. Dip that end into rooting hormone powder (Garden Safe Take Root or similar). Tap off the excess. Rooting hormone isn’t strictly required, but without it, the failure rate on lilac cuttings climbs sharply.
- Prepare the pot. Fill an 8-inch pot with moist, well-drained potting mix—a blend of peat, perlite, or standard potting soil works. Pre-make a hole in the soil with a pencil or chopstick.
- Insert the cutting. Place the cutting about 2 inches deep so that at least two nodes are buried. Do not push the stem directly into the soil—that scrapes the hormone off. Use the pre-made hole.
- Create a humidity dome. Cover the pot with a clear plastic bag, a cut soda bottle, or purpose-made dome. Poke a few small holes in it for airflow. Set the pot in bright, indirect light—a north-facing windowsill or shaded spot on a porch. Direct sun will cook an unrooted cutting within hours.
- Maintain moisture. Keep the soil damp but never soggy. Water when the top layer feels dry to the touch. A spray bottle works better than a watering can, which can flood the pot and wash out the hormone.
- Wait for roots. In 6 to 8 weeks, check for resistance when you gently tug the cutting. If it holds firm, roots have formed. Remove the plastic dome, move the pot to brighter light, and let the soil dry more between waterings.
- Transplant. Transplant the new lilac to the garden in fall or early spring after the roots have filled the pot.
New leaf growth at the top of the cutting within 1–3 weeks is a good sign—it means the stem is alive and energy is flowing. Once you feel resistance on a gentle tug, the root system is established enough to move to the next stage.
How To Start a Lilac Bush From a Cutting: Key Failure Points
Even experienced gardeners lose cuttings. These are the most common reasons a cutting fails, and what to do instead.
| Mistake | Why It Kills the Cutting | Fix |
|---|---|---|
| Using woody or brown stems | Woody stems lack the active growth cells needed to form roots | Only take green, flexible tip growth from the current season |
| Cutting too early or too late | Softwood cuttings taken before bloom or after growth hardens seldom root | Wait until flowering ends; take softwood cuttings while stems are still tender |
| Forcing stem into soil | Scrapes off rooting hormone, reducing root formation | Pre-make a hole with a pencil, then insert the cutting gently |
| Direct sunlight before rooting | Causes leaves to dry and the cutting to wilt before roots form | Keep in bright, indirect light only until the plant is established |
| Soil too wet | Stem rots before roots can grow | Water when the top layer is dry; mist rather than pour |
| Taking only one or two cuttings | Low success rate means you may end up with nothing | Take at least four to six cuttings to improve your odds |
Propagating Lilacs From Suckers: The Faster, More Reliable Route
Lilacs naturally send up new shoots from the root system around the base of the main plant—these are called suckers. They already have roots. Separating and replanting a sucker has a near-perfect success rate in the right season, and the new shrub reaches blooming size years faster than a cutting ever will.
To propagate from a sucker: In early spring before growth starts, or in fall after leaf drop, dig around the base of a sucker that stands at least 6 to 12 inches tall. Cut the connecting root with a sharp spade, lift the sucker with as much of its own root ball as possible, and replant it immediately in a prepared hole. Water it in well. That’s the whole process—no hormone, no humidity dome, no two-month wait to find out if it took. Flower Patch Farmhouse’s trial on lilac sucker propagation reported consistent success with this method, and for the home gardener it is the practical choice every time a sucker is available.
Avoiding Rot and Disease With Lilac Cuttings
The high humidity that helps a cutting root is also what rots it if conditions aren’t right. The plastic dome traps moisture, but stale, wet air promotes fungal growth. Open the dome or bag daily for five minutes to let fresh air move through. If you see mold forming on the soil surface or on the leaves, remove the affected material immediately and reduce watering. A small fan in the room, set to low, can improve air circulation without drying the cutting out.
Use clean, sharp pruners and a sterile potting mix. Dirty tools transfer disease from the parent plant, and old soil can harbor damping-off fungus that kills cuttings before they root.
Which Lilac Varieties Root Best?
Not all lilacs are equally easy to root. Standard common lilacs (Syringa vulgaris) are the classic choice and can be propagated from cuttings with patience. Smaller varieties such as little leaf lilacs (Syringa microphylla) are often reported to root more readily than their larger cousins. If you have access to both, the smaller-leafed type gives a beginner a better chance on a first attempt.
Lilac Cutting vs. Sucker Propagation: Which Should You Choose?
| Method | Time to Roots | Success Rate | Ease |
|---|---|---|---|
| Softwood cutting | 6–8 weeks | Low to moderate | Moderate: requires hormone, humidity dome, daily care |
| Hardwood cutting | 2–6 months | Low | Easy setup, long wait, high chance of failure |
| Sucker division | Immediate (already rooted) | Near 100% | Easy: dig, separate, replant, water |
The cutting method makes sense if you are taking a piece from a friend’s bush and have no access to suckers, or if you want to try it for the learning experience. If the parent plant has suckers at its base, dig one of those instead—you will have a new lilac bush in the ground this season, not next year.
References & Sources
- Plant Addicts. “Propagating Lilac.” Step-by-step guide for softwood and hardwood cuttings.
- Gardening Know How. “How To Propagate Lilacs: Easiest & Most Effective Methods.” Best timing and instructions for propagating lilac bushes.
- Flower Patch Farmhouse. “Lilac Propagation: Grow Stunning Shrubs from Suckers!” Detailed comparison showing near-perfect success rates for sucker propagation.