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How to divide a lavender bush is simple: you dig it up or take cuttings and split the plant into smaller sections, each with its own roots and stems.
Dividing a lavender bush is one of the best ways to refresh an old, woody plant and get more of it for free.
You can divide a lavender bush in early spring or early fall when the plant is not in full bloom.
This gives the new divisions time to settle in before extreme heat or cold stresses them.
If you’ve been wondering how to divide a lavender bush without killing it, don’t worry, it’s easier than it looks.
In this post, we’ll walk through when to divide a lavender bush, the tools you need, and the exact steps to split it successfully.
Let’s get into it.
Why You Should Divide a Lavender Bush
You should divide a lavender bush for a few good reasons, and they all help the plant in the long run.
1. It Rejuvenates an Old Plant
Lavender tends to get woody and leggy after a few years, and dividing it can breathe new life into the plant.
When you divide a lavender bush, you remove the dead center and give the healthy outer growth a chance to thrive again.
2. It Gives You Free New Plants
Every time you divide a lavender bush, you end up with several new starts you can replant elsewhere.
That means more lavender for your garden beds, borders, or containers without spending a dime.
3. It Improves Airflow and Health
A crowded lavender bush can trap moisture and invite root rot, so dividing it opens up the plant.
Better airflow around the stems keeps your lavender healthier and less prone to fungal issues.
When to Divide a Lavender Bush
Timing matters a lot when you divide a lavender bush, so pick the right window.
1. Early Spring Is Ideal
Early spring, just as new growth starts to show, is the best time to divide a lavender bush.
The plant is waking up, the soil is workable, and the roots can establish quickly.
2. Early Fall Works Too
Early fall is another good window to divide a lavender bush, as long as the heat has passed.
This gives roots time to settle before the first frost arrives.
3. Avoid Dividing During Bloom
Never divide a lavender bush while it’s in full flower, because the plant is using all its energy on blooms.
Dividing then stresses the plant and can set it back for months.
How to Divide a Lavender Bush Step by Step
Here’s how to divide a lavender bush so the new sections actually survive.
1. Water the Plant a Day Before
Give the lavender a deep watering the day before you divide a lavender bush, so the soil is soft and roots are hydrated.
2. Dig Around the Root Ball
Use a sharp spade to dig a wide circle around the base, then lift the whole plant out gently.
3. Shake Off Excess Soil
Once the plant is out, shake off loose dirt so you can see the roots clearly before you divide a lavender bush.
4. Split the Root Ball
Use a clean knife, pruners, or two forks to pull the root ball apart into two or three sections, each with roots and stems.
5. Trim Dead Roots and Stems
Cut away any brown, mushy roots and woody dead stems so each division is healthy.
6. Replant Immediately
Plant each division in well-draining soil at the same depth it was growing before, then water thoroughly.
Tips for Success When You Divide a Lavender Bush
A few extra tips will help every time you divide a lavender bush.
1. Choose Well-Draining Soil
Lavender hates wet feet, so plant your divisions in sandy or gravelly soil.
2. Don’t Overwater New Divisions
Water once after planting, then let the soil dry out a bit before watering again.
3. Give Them Full Sun
Lavender needs at least six hours of sun, so pick a bright spot for each new plant.
So, How Do You Divide a Lavender Bush?
You divide a lavender bush by digging it up in early spring or early fall, splitting the root ball into sections with roots and stems, and replanting each one in well-draining soil.
It’s a simple job that rejuvenates an old plant and multiplies your lavender for free.
Just remember to time it right, keep the roots healthy, and give the new divisions plenty of sun.
With a little patience, you’ll have a garden full of happy, thriving lavender.