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Yes, you can absolutely split up a lavender plant, and it’s one of the best ways to keep your garden thriving for years.
If you’ve noticed your lavender getting woody, overcrowded, or just not blooming as vigorously as it used to, splitting it up is a fantastic solution.
Can you split up a lavender plant without killing it?
You certainly can, but it all comes down to timing and technique, because lavender isn’t quite as forgiving as some other perennials.
In this post, we’ll dig into exactly how to split up a lavender plant, when to do it, and the steps that give you the best chance of success.
We’ll also cover common mistakes so you can avoid turning a simple division into a garden tragedy.
Let’s get our hands dirty and figure out the smartest way to split up a lavender plant.
Why You Can Split Up A Lavender Plant
Splitting up a lavender plant is totally doable, but you need to understand the plant’s nature first.
Lavender is a woody perennial, and unlike soft-stemmed flowers, it doesn’t always respond well to being torn apart.
However, when done correctly, splitting up a lavender plant can rejuvenate an older specimen and give you new plants for free.
The trick is knowing which lavender plants are good candidates for splitting and which ones are simply too old and woody to survive the process.
1. Young And Vigorous Plants Split Best
If you’re wondering can you split up a lavender plant that’s only a couple years old, the answer is a confident yes.
Younger lavender plants have plenty of fresh growth near the base, and that’s exactly where new roots will form after division.
When you split up a lavender plant that’s still in its prime, each divided section has enough energy to establish itself in a new spot.
Older plants, especially those that are five years or more, tend to have a large woody center with very little active growth.
And that woody center won’t root well at all, so splitting those is risky.
2. Splitting Encourages Better Airflow
Another reason you might want to split up a lavender plant is to improve airflow around the stems.
Lavender hates humidity and stagnant air, and an overcrowded clump can quickly develop fungal issues.
By splitting up a lavender plant, you open up the center so sunlight can reach the lower leaves and air can circulate freely.
This simple act can prevent rot and keep your lavender looking fresh and healthy all season long.
3. It’s Great For Propagation
When you split up a lavender plant, you’re essentially making new lavender plants without spending a dime.
Each division, if it has roots attached, can be replanted and grown into a full-size lavender bush.
This is especially useful if you want to create a lavender hedge or fill in a border with multiple plants.
So if you’ve been asking can you split up a lavender plant to multiply your stock, the answer is absolutely yes.
When Is The Best Time To Split Up A Lavender Plant
Timing is everything when you decide to split up a lavender plant.
If you do it at the wrong time of year, the plant may go into shock and struggle to recover.
The ideal window is early spring, just as new growth begins to emerge.
This gives the divided sections the entire growing season to establish strong roots before winter arrives.
You can also split up a lavender plant in early autumn, but only if you live in a mild climate.
Splitting too late in the fall leaves the new divisions vulnerable to frost damage before they’ve had time to settle in.
1. Spring Is The Sweet Spot
In early spring, the lavender plant is waking up from its winter dormancy.
The soil is warming, and the plant is full of stored energy ready to push out new shoots.
When you split up a lavender plant during this active growth phase, the roots recover much faster.
Aim for a mild, overcast day so the sun doesn’t stress the freshly divided roots while you work.
2. Avoid Splitting In Summer Heat
You should never split up a lavender plant during a blazing hot summer afternoon.
High temperatures cause rapid water loss, and your new divisions will likely wilt before they can root.
If you absolutely must split in summer, do it in the early morning and keep the divisions shaded and watered.
But trust me, waiting for spring is a much safer bet when you want to split up a lavender plant successfully.
How To Split Up A Lavender Plant Step By Step
Now that you know you can split up a lavender plant, let’s talk about the actual process.
It’s not complicated, but it does require a gentle touch and a sharp tool.
Here’s a simple, foolproof method for splitting lavender.
1. Prepare The New Planting Spot
Before you lift the lavender, dig holes for the divisions in their new location.
Lavender loves well-draining, sandy soil with a slightly alkaline pH.
Mix in a little grit or perlite if your soil is heavy clay to improve drainage.
Having the holes ready means you can replant immediately after you split up a lavender plant.
2. Lift The Entire Plant Carefully
Use a garden fork or spade to loosen the soil all around the lavender clump.
Start about six to eight inches away from the stems to avoid slicing through too many roots.
Gently pry the whole plant out of the ground, keeping as much of the root ball intact as possible.
Once it’s out, shake off excess soil so you can actually see the root structure.
3. Divide The Root Ball
Now comes the moment where you physically split up a lavender plant.
Look for natural divisions in the crown where separate rosettes of growth meet the roots.
Use a sharp, clean knife or a spade to cut through the root ball, ensuring each section has both roots and green shoots.
Try to make divisions that are at least the size of a fist, as smaller pieces will struggle to survive.
If the center of the plant is woody and dead, discard it and only keep the vigorous outer sections.
4. Replant And Water Thoroughly
Place each division in its prepared hole at the same depth it was growing before.
Firm the soil around the roots gently to remove air pockets.
Water deeply right after planting to help settle the soil and encourage root-to-soil contact.
But don’t overwater afterward, lavender hates soggy feet, so let the soil dry out between waterings.
Common Mistakes When You Split Up A Lavender Plant
Even though you can split up a lavender plant, there are a few pitfalls that can ruin the whole project.
Let’s make sure you steer clear of these common blunders.
1. Splitting Old Woody Lavender
The biggest mistake is trying to split up a lavender plant that’s ancient and woody.
If there’s no soft green growth near the base, division won’t work because there are no active buds to form new shoots.
In that case, your best bet is to take softwood cuttings instead of trying to split the whole plant.
2. Planting Divisions Too Deep
When you replant your lavender divisions, don’t bury them deeper than they were originally.
Lavender stems are prone to rot if they’re covered with soil or mulch.
Keep the base of the stems exposed to the air, just like you see in the original planting.
3. Overwatering After Splitting
It’s tempting to give your fresh divisions lots of water to help them settle in.
But lavender actually prefers to be on the drier side, even when establishing new roots.
Water once thoroughly after planting, then wait until the soil is completely dry before watering again.
This prevents root rot and encourages the roots to grow deeper in search of moisture.
So, Can You Split Up A Lavender Plant?
Yes, you can split up a lavender plant, and it’s a rewarding way to refresh your garden and create new plants.
The key is to start with a younger, vigorous plant and split it in early spring when growth is just beginning.
Use a sharp tool to divide the root ball into sections with both roots and green shoots, then replant them in well-draining soil.
Avoid splitting old woody specimens, and never overwater your new divisions.
Following these simple steps ensures you can split up a lavender plant without losing any of your precious lavender to shock or rot.
So grab your spade, pick a mild spring morning, and give your lavender the fresh start it deserves.