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Yes, English lavender can be divided, and doing so is a fantastic way to keep your plants healthy while multiplying your garden stock for free.
If you have a mature lavender bush that’s looking a bit woody or sparse in the middle, you might be wondering exactly how to go about it.
The good news is that dividing English lavender is a straightforward process, but it does require a slightly different approach than dividing many other perennials.
In this post, we’ll explore when you can divide English lavender, the best techniques to ensure success, and the common mistakes that could harm your fragrant plants.
Let’s dig into everything you need to know about dividing this beloved herb.
Why You Can Divide English Lavender Successfully
English lavender can be divided because of its unique growth habit, which offers you a real opportunity to rejuvenate older specimens.
Unlike some plants that have a single central crown, English lavender develops multiple woody stems that sprout from a base, giving you natural sections to work with.
These separate stems often have their own root systems, making the division process more viable than you might think.
So if you’ve been asking yourself, “Can English lavender be divided?” the answer is a confident yes, provided you follow the right timing and method.
Let’s look at the reasons why this works so well for gardeners.
1. The Plant’s Natural Structure Supports Division
English lavender grows in a clumping form, with multiple stems emerging from a shared woody base over several years.
As the plant matures, it often produces new shoots from the edges while the center becomes older and woodier.
This outward growth means you can often find younger, vigorous sections that have their own roots, perfect for dividing.
So when you divide English lavender, you’re essentially separating these naturally occurring independent sections.
2. Division Rejuvenates Tired Plants
If your English lavender is looking tired, with lots of dead wood and fewer blooms, division can breathe new life into it.
When you divide English lavender, you remove the old, unproductive center and keep the healthy outer growth.
This encourages fresh root development and vigorous new shoots, leading to a healthier, more floriferous plant.
It’s an excellent way to extend the lifespan of a lavender that might otherwise decline.
3. It’s Cost-Effective Propagation
Dividing English lavender gives you new plants for free, which is always a win for any gardener.
Instead of buying new lavender from a nursery, you can simply divide your existing plant to fill other spots in your garden.
Furthermore, you can share these divisions with friends and family, spreading the joy of this aromatic herb.
This makes the question of whether English lavender can be divided even more appealing when you consider the savings.
When Is The Best Time To Divide English Lavender?
Timing is critical when you decide to divide English lavender, and getting it right will dramatically increase your success rate.
The ideal window for dividing English lavender is in early spring, just as new growth begins to emerge.
Alternatively, you can also divide in early autumn, giving the plant time to establish roots before winter frosts arrive.
Avoid dividing during the hot summer months, as the stress of transplanting combined with heat can be fatal.
The Early Spring Window
In early spring, usually around March or April depending on your zone, the plant is waking up and full of energy.
This is the perfect time to divide English lavender because the cooler weather and regular spring rains help new divisions settle in.
The plant’s energy is directed towards root and shoot growth, which is exactly what you need after division.
The Early Autumn Option
Dividing in early autumn, around September, is another viable time to divide English lavender.
The soil is still warm from summer, which encourages root growth, while the air is cooler, reducing moisture loss.
This gives your divided plants a head start before they go dormant for the winter.
Just make sure they have at least a few weeks to establish before the first hard frost.
Step-by-Step Guide: How To Divide English Lavender
Now for the practical part; here’s a clear, step-by-step method for how to divide English lavender without damaging your plant.
You’ll need a sharp spade, a pruning saw for tough roots, and some good quality potting soil or compost.
1. Prepare the Parent Plant
Begin by watering your English lavender thoroughly a day before you plan to divide it.
This ensures the roots are hydrated and more flexible, making the division process less stressful.
Next, cut back the top growth by about one-third to reduce the strain on the roots.
This rebalancing is key because the reduced root system won’t have to support as much foliage.
2. Lift the Entire Clump
Carefully dig around the entire plant with your spade, staying about six to eight inches away from the base.
Gently pry the whole clump out of the ground, trying to keep the root ball as intact as possible.
Once lifted, place it on a tarp or a flat surface where you can work on it comfortably.
3. Separate the Sections
Look for natural divisions in the root ball where stems and roots seem to separate.
You can often pull these sections apart with your hands, but for tougher, woodier clumps, you’ll need your pruning saw.
Make sure each division has a good amount of roots attached to several healthy stems.
When you divide English lavender this way, you’re ensuring each new plant has the best chance to survive.
4. Plant Your New Divisions
Immediately replant your divisions at the same depth they were originally growing.
Water them in well and keep the soil consistently moist for the first few weeks as they establish.
Adding a layer of gravel or mulch around the base can help with drainage, which lavender absolutely loves.
Common Mistakes To Avoid When You Divide English Lavender
Even though you can divide English lavender, there are a few pitfalls that can cause your efforts to fail.
Avoiding these will make the process far more rewarding.
1. Dividing Old, Woodiest Centers
The oldest, woodiest part of the lavender plant rarely roots well after division.
It’s often dead or dying in the middle and won’t produce new growth.
When you divide English lavender, focus on the younger, greener outer sections which have more vitality.
Don’t waste time on the ancient, woody core.
2. Overwatering After Division
Lavender hates wet feet, and this is especially true after you divide English lavender.
While they need consistent moisture to establish, they should never sit in soggy soil.
Overwatering is the number one cause of failure, leading to root rot and a quick demise.
Water deeply but infrequently, allowing the soil to dry out slightly between waterings.
3. Dividing When The Plant Is Dormant
Dividing lavender during the dead of winter is a bad idea, as the roots are inactive and can easily rot.
Also, avoid dividing during the peak of summer heat because the plant will struggle to cope with water loss.
Stick to the recommended times of early spring or early autumn for the best results.
So, Can English Lavender Be Divided?
Yes, English lavender can be divided, and it’s a highly rewarding task when done correctly.
By understanding the plant’s natural structure and following the proper timing, you can successfully divide English lavender to rejuvenate old plants and create new ones.
Remember that while it shares similarities with other perennials, it requires a gentler touch and sharp tools to deal with its woody nature.
I hope this guide has given you the confidence to head out to your garden and try it for yourself.
Now go ahead and give your lavender a fresh start by dividing it this season.