For an established lavender with a woody base, taking cuttings is the more straightforward starting point. Do not assume you can chop the plant into sections as you would a spreading, herbaceous perennial.
That recommendation needs a qualification: horticultural sources do not give identical advice. Clemson Extension advises against dividing lavender’s woody shrub, while an archived University of California guide lists division among propagation methods. Clemson Extension, UC IPM archived guide.
The useful distinction is what you intend to separate: the main woody plant, a branch that has already rooted, or a cutting that still needs to grow roots.
A rooted branch is different from a split crown
Clemson explains that these small woody shrubs can develop rooted layers: branches that form roots where they touch the soil. Such a branch can be detached and replanted. That is different from cutting the main shrub into pieces. Clemson’s guidance.
Before doing anything destructive, look at the plant’s structure. Several stems coming from one woody base are not, by themselves, evidence of several independently rooted plants.
| What you have | A sensible next step |
|---|---|
| One established woody shrub | Leave its main base intact and consider cuttings |
| A branch with roots of its own where it meets the soil | Investigate separating that rooted layer |
| An old, straggly plant | Consider replacement rather than treating division as a guaranteed rejuvenation method |
These choices follow Clemson’s distinction between woody shrubs and rooted layers, together with the RHS recommendation to replace older lavender that has become badly misshapen. RHS lavender guide.
How to start with cuttings
The RHS recommends softwood or semi-ripe cuttings for propagating lavender. Cuttings preserve the parent plant’s characteristics; plants raised from collected cultivar seed may vary. RHS propagation advice.
For a basic semi-ripe cutting:
- Select healthy growth from the current season, using clean, sharp tools.
- Prepare a cutting about 4–6 inches long, trimming just below a leaf node.
- Remove the lowest leaves and soft tip.
- Insert it into a free-draining cutting medium, water and let it drain.
- Keep it in bright light out of direct sun, with the medium damp and excess moisture controlled.
These steps summarize the RHS semi-ripe cutting method. Match the method to the growth you have and your local conditions; a calendar date alone does not establish that a stem is suitable.
Do not confuse propagation with hard pruning
Cutting a woody lavender back severely is not the same as making new plants. The RHS notes that lavender does not readily produce fresh growth from old wood. Avoid treating a bare woody base as if it were a clump that will reliably regrow after being chopped. RHS pruning guidance.
