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You can divide a lavender plant by digging up the entire root ball and splitting it into smaller sections, each with its own roots and stems.
This is one of the easiest ways to propagate lavender and keep your garden smelling amazing.
If you’ve been wondering how to divide a lavender plant, you’re in the right place because it’s a simple process once you know the right timing and technique.
It’s also a fantastic way to rejuvenate older plants that have become woody and sprawling.
In this post, we’ll walk through exactly how to divide a lavender plant step by step, the best time to do it, and how to care for your new divisions so they thrive.
Let’s get right into it.
How to Divide a Lavender Plant: The Step-by-Step Process
Learning how to divide a lavender plant starts with understanding the plant’s root system and preparing ahead of time.
Here’s the full breakdown of how to divide a lavender plant correctly.
1. Choose the Right Time of Year
The best time to divide a lavender plant is in early spring or early autumn when the plant is not in full bloom.
Dividing during these cooler, milder seasons gives the roots time to settle before extreme heat or cold sets in.
Avoid dividing lavender in the middle of summer when the plant is stressed by heat, and avoid winter when growth is dormant.
2. Water the Plant a Day Before Dividing
A day before you divide a lavender plant, give it a deep watering.
Moist soil holds together better and makes it easier to lift the root ball without tearing too many roots.
Dry soil crumbles away quickly, which can leave the roots exposed and vulnerable during the division process.
3. Dig Around the Root Ball Carefully
Use a sharp spade or garden fork to dig a circle around the drip line of the lavender plant.
Go slowly and work the tool underneath the root ball to lift it out of the ground.
Try to keep as many roots intact as possible when you divide a lavender plant, since healthy roots mean faster establishment.
4. Split the Root Ball Into Sections
Once the plant is out of the ground, place it on a tarp or sturdy surface.
Use a sharp knife, pruning saw, or even two garden forks back-to-back to pry the root ball apart.
Each section you divide should have a good mix of roots and healthy stems.
Aim for divisions that are at least the size of your fist so they have enough energy to survive.
5. Replant the Divisions Right Away
When you divide a lavender plant, the new sections need to go back into the ground quickly.
Plant them at the same depth they were growing before, in well-draining soil and full sun.
Water each division thoroughly after planting to help settle the soil around the roots.
Why You Should Divide a Lavender Plant
There are several great reasons to divide a lavender plant beyond just making more plants.
Understanding these benefits will help you decide if division is the right move for your garden.
1. It Rejuvenates Older Plants
Lavender plants tend to get woody and leggy after a few years.
When you divide a lavender plant, you essentially give it a fresh start by removing old, tired growth and encouraging new shoots.
This can bring an aging plant back to life and extend its productive years in your garden.
2. It Prevents Overcrowding
Lavender needs good air circulation to stay healthy and avoid fungal issues.
When plants grow too close together, they compete for nutrients, water, and sunlight.
If you divide a lavender plant every few years, you keep it from choking out its neighbors and creating a humid microclimate that invites disease.
3. It’s a Free Way to Get More Plants
Why buy new lavender starts when you can divide a lavender plant you already own?
Each division is a brand new plant that will grow and bloom just like the parent.
This makes division one of the most budget-friendly ways to expand your lavender collection or share plants with friends.
4. It Improves Bloom Production
A lavender plant that’s crowded or root-bound often produces fewer flowers.
When you divide a lavender plant, you give the roots more room to spread and access nutrients.
The result is usually more vigorous growth and a bigger, more fragrant bloom the following season.
Tips for Success When You Divide a Lavender Plant
A few smart habits will make the whole process smoother and give your divisions the best shot at thriving.
1. Keep the Roots Moist
Never let the roots dry out while you’re working.
Mist them with water or cover them with a damp cloth if you need to pause before replanting.
2. Trim Back Top Growth
After you divide a lavender plant, cut back about a third of the top growth.
This reduces the demand on the roots while they’re re-establishing themselves in their new spot.
3. Avoid Dividing Sick Plants
If your lavender is struggling with root rot or disease, don’t divide it.
Focus on fixing the underlying problem first, then divide a lavender plant once it’s healthy again.
4. Mulch, But Keep It Away From the Stems
A light layer of gravel or coarse mulch helps with drainage, but keep it a few inches away from the stems.
Lavender hates sitting in moisture, so good airflow around the base is key.
So, How Do You Divide a Lavender Plant?
You divide a lavender plant by digging up the root ball, splitting it into sections with roots and stems, and replanting each piece right away.
It’s best done in early spring or early autumn when the plant isn’t in full bloom.
With proper timing and a little care, you can divide a lavender plant to rejuvenate your garden and multiply your lavender for free.
Give it a try this season, and you’ll be rewarded with healthier plants and more of that beautiful fragrance.