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To divide English lavender, you essentially dig up the plant and split its root ball into smaller sections, each with its own roots and stems, then replant them.
It’s a straightforward way to rejuvenate an old, woody plant or to multiply your lavender for free.
If you’ve been wondering how to divide English lavender without killing it, you’re in the right place.
Dividing English lavender isn’t quite as simple as splitting a hosta, but it’s absolutely doable with a little care and the right timing.
In this post, we’ll walk through when to divide English lavender, how to do it step by step, and how to care for your new plants so they thrive.
Let’s dig in.
Why Divide English Lavender?
Dividing English lavender is worth the effort for a few key reasons.
Here’s why you might want to split your plant.
1. It Rejuvenates Old, Woody Plants
English lavender tends to get woody and leggy after a few years.
The center of the plant dies out, and you’re left with a ring of growth around a bare middle.
Dividing English lavender lets you discard the dead center and replant the healthy outer sections.
This gives the plant a fresh start and encourages vigorous new growth.
2. It Multiplies Your Plants for Free
If you love lavender, you probably want more of it.
Dividing English lavender is one of the easiest ways to get new plants without spending a dime.
One healthy clump can turn into two, three, or even four new lavender plants.
You can fill gaps in your garden or share divisions with friends.
3. It Improves Airflow and Health
Overcrowded lavender is more prone to fungal issues like root rot.
When you divide English lavender, you open up the plant and improve airflow around the stems.
This reduces the risk of disease and helps each division grow stronger.
When to Divide English Lavender
Timing is everything when you divide English lavender.
Get it wrong, and you could stress the plant beyond recovery.
The best time to divide English lavender is in early spring or early fall.
In spring, aim for when new growth is just starting to emerge but before the plant flowers.
In fall, wait until the heat of summer has passed but give the divisions enough time to root before winter.
Avoid dividing English lavender in the middle of summer when the plant is flowering and heat stress is high.
Also, skip dividing during freezing weather, as the roots won’t establish properly.
Signs Your English Lavender Needs Dividing
Not sure if it’s time to divide English lavender?
Look for these signs that your plant is ready for a split.
The center of the plant is woody and bare, with growth only around the edges.
The plant has become sprawling and floppy instead of compact and bushy.
Flowering has decreased compared to previous years.
The clump is so large it’s crowding neighboring plants.
If you notice any of these, it’s a good time to divide English lavender.
How to Divide English Lavender Step by Step
Now for the main event: how to actually divide English lavender.
Follow these steps for the best results.
1. Water the Plant the Day Before
A well-hydrated plant handles the stress of division much better.
Give your English lavender a deep watering the day before you plan to divide it.
This makes the root ball easier to dig up and helps the plant recover faster.
2. Dig Up the Entire Clump
Use a sharp spade or garden fork to dig around the drip line of the plant.
Go deep enough to get under the root ball without slicing through it.
Lift the entire clump out of the ground and set it on a tarp or in a wheelbarrow.
Be gentle, but don’t worry if you lose a few roots in the process.
3. Shake Off Excess Soil
Once the clump is out, shake it gently to remove loose soil.
You want to see the structure of the roots so you can find natural division points.
If the soil is heavy clay, you may need to rinse it away with a hose.
This makes it much easier to divide English lavender cleanly.
4. Split the Root Ball
This is the part where you actually divide English lavender.
Look for natural separations in the root ball where the plant has already started to split.
Use your hands to pull sections apart, or use a sharp knife or garden saw for tougher clumps.
Each division should have a good chunk of roots and several healthy stems.
Aim for divisions that are at least the size of your fist.
Smaller pieces may struggle to survive.
5. Discard the Woody Center
The center of an old English lavender plant is usually dead and woody.
Don’t bother replanting it.
Toss it on the compost pile or discard it.
Only keep the outer sections that have healthy roots and green growth.
This is the key to successfully dividing English lavender that will actually thrive.
6. Replant Immediately
Don’t let the divisions dry out.
Replant them as soon as possible in well-draining soil and full sun.
Dig a hole slightly larger than the root ball and place the division at the same depth it was growing before.
Water thoroughly to settle the soil around the roots.
Space plants 18 to 24 inches apart to give them room to grow.
Caring for Newly Divided English Lavender
Your newly divided English lavender needs a little TLC to get established.
Here’s how to help them settle in.
1. Water Regularly but Don’t Overdo It
Keep the soil evenly moist for the first few weeks after dividing English lavender.
But don’t drown them.
Lavender hates soggy roots, so let the top inch of soil dry out between waterings.
Once you see new growth, you can cut back to a normal watering schedule.
2. Skip the Fertilizer
Newly divided plants don’t need fertilizer right away.
In fact, too much nitrogen can burn the tender roots and encourage weak, floppy growth.
Wait until the following spring to feed your English lavender lightly.
3. Mulch with Gravel or Sand
Lavender loves gritty, well-draining soil.
Top-dress around your divisions with a layer of gravel or coarse sand.
This keeps the soil surface dry and prevents moisture from sitting against the stems.
It also helps suppress weeds without trapping too much moisture.
4. Prune Lightly After a Few Weeks
Once your divisions show signs of new growth, give them a light trim.
Snip off any dead or damaged stems and shape the plant lightly.
Don’t cut into the woody parts, just tidy up the soft green growth.
This encourages the plant to branch out and become bushier.
So, How Do You Divide English Lavender?
To divide English lavender, you dig up the plant in early spring or fall, split the root ball into sections with healthy roots and stems, discard the woody center, and replant immediately.
It rejuvenates old plants, multiplies your lavender for free, and improves airflow to keep your garden healthy.
Just remember to water before digging, replant right away, and give the new divisions a little time to settle in.
So, now you know exactly how to divide English lavender and keep your garden full of these fragrant beauties for years to come.