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Yes, you can split up a lavender plant, and it’s one of the best ways to multiply your garden favorites.
If you’ve been wondering whether you can split up a lavender plant without harming it, the answer is yes, but timing and technique matter a lot.
You can split up a lavender plant to create new plants, rejuvenate an older woody one, or simply keep your lavender patch looking tidy.
In this post, we’ll dig into exactly how to split up a lavender plant successfully, when to do it, and the common mistakes that can turn a good division into a sad, wilting mess.
Let’s get our hands dirty and talk lavender splitting.
You Can Split Up a Lavender Plant: Here’s Why It Works
Lavender is a hardy perennial, and like many perennials, it responds well to division when done correctly.
However, you can’t split up a lavender plant the same way you’d split a hosta or a daylily, because lavender has a woody base that doesn’t always root back easily from every chunk.
But yes, you can split up a lavender plant if you focus on the younger, greener outer growth rather than the old, woody center.
The key is understanding that lavender roots are fibrous, and they’ll regrow from sections that have both healthy roots and fresh shoots.
1. Lavender’s Growth Habit Makes Division Possible
Lavender grows from a central crown that sends out new stems each year.
When you split up a lavender plant, you’re essentially separating those newer stems with their own root systems from the mother plant.
If you look closely at a mature lavender shrub, you’ll often see that the base has naturally layered itself, meaning some stems have already started to form their own roots where they touch the soil.
Those rooted sections are perfect candidates for splitting.
So yes, you can split up a lavender plant as long as each division has a decent root ball attached.
2. Splitting Rejuvenates Older Lavender Plants
Over time, lavender plants can become woody at the base, with lots of bare stems and less foliage.
When that happens, you can split up a lavender plant to give it a fresh start and encourage new, vigorous growth from the younger sections.
The old woody center often won’t regrow after division, so you’ll discard that part and keep the lively outer portions.
This is a great way to extend the life of a lavender plant that’s losing its charm.
3. It Gives You Free New Plants
If you love the scent and look of your specific lavender variety, you can split up a lavender plant to clone it essentially.
Each successful division becomes an independent plant with the same flower color, fragrance, and growth habit as the parent.
This is much faster than growing lavender from seed, which can take a full season just to sprout.
So while you can split up a lavender plant for practical reasons like space, you’re also getting free plants for your garden or to share with friends.
When Is the Best Time to Split Up a Lavender Plant?
Timing is everything when you decide to split up a lavender plant.
You can’t just dig up lavender in the middle of a heatwave and expect it to thrive.
The best window is early spring, just as new growth begins to show at the base, or in early autumn after the plant has finished its main bloom.
Splitting in spring gives the divisions a full growing season to establish roots before winter.
Splitting in early fall works too, as long as you give the plant at least six weeks to settle in before the first hard frost.
Avoid splitting in the heat of summer because the stress of transplanting combined with high temperatures can kill your lavender divisions quickly.
1. Prepare the Plant a Few Days Before Splitting
A day or two before you split up a lavender plant, water it thoroughly.
Hydrated roots are more flexible and less likely to break during the division process.
You might also trim back the top growth by about a third, which reduces the amount of foliage the roots need to support after transplanting.
This simple prep step makes a big difference in survival rates.
2. Use the Right Tools for Clean Cuts
To split up a lavender plant properly, you’ll need a sharp spade, a sturdy knife, or even a hori-hori garden tool.
Dull tools can crush the stems and roots, leaving them vulnerable to rot and disease.
Sterilize your cutting tools with rubbing alcohol before you start to prevent spreading any pathogens.
Clean cuts heal faster and give each split the best chance to establish itself.
Step-by-Step: How to Split Up a Lavender Plant
If you’re ready to try it, here’s a simple process to follow when you split up a lavender plant.
1. Dig Around the Plant Wide and Deep
Start by digging a circle around the lavender plant, about six to eight inches away from the base of the stems.
Go deep, at least eight inches, to capture as many roots as possible.
Lavender roots can spread wide, so don’t be timid about digging a generous area.
Lift the entire root ball out of the ground and gently shake off excess soil so you can see the root structure clearly.
2. Identify Natural Division Points
Once the root ball is out, look for natural seams where stems and roots naturally separate.
These are often found around the outer edges of the root ball rather than the center.
You can split up a lavender plant by pulling apart these sections with your hands if they’re loose, or by cutting them with your knife.
Each division should have at least three to five healthy stems and a good cluster of roots.
If a section breaks off without adequate roots, it likely won’t survive, so just discard it.
3. Trim the Divisions Before Planting
Trim the roots of each division slightly to encourage new growth, and cut back the top foliage by half.
This rebalances the plant so the reduced root system doesn’t have to feed too many leaves.
You can split up a lavender plant into as many divisions as you have rooted sections, but don’t make divisions too tiny, as they’ll struggle to establish.
4. Plant Immediately and Water Well
Plant each lavender division in well-draining soil, at the same depth it was growing before.
Water them in thoroughly right after planting to remove air pockets around the roots.
After that first deep watering, let the soil dry out between waterings, as lavender hates wet feet.
Mulch lightly with gravel or sand to keep the base dry and prevent moisture from sitting against the stems.
Common Mistakes When You Split Up a Lavender Plant
Even experienced gardeners mess up when they split up a lavender plant, so here are the pitfalls to avoid.
1. Dividing in the Wrong Season
If you try to split up a lavender plant in hot, dry summer weather, the divisions will likely fail.
The roots can’t take up water fast enough to replace what the leaves lose through transpiration.
Stick to early spring or early autumn for the best results.
2. Keeping the Woody Center
The old woody center of a lavender plant rarely produces new roots after division.
When you split up a lavender plant, focus on the soft, green, actively growing outer stems.
If a division is mostly brown and woody with little green growth, it’s probably not worth planting.
3. Overwatering After Splitting
It’s tempting to baby your new lavender divisions with lots of water, but that’s a deadly mistake.
Lavender is a Mediterranean plant that thrives in dry, rocky, alkaline soil.
When you split up a lavender plant, keep the soil slightly moist for the first week, then gradually reduce watering.
Too much water encourages root rot, which will kill your divisions faster than anything else.
4. Expecting 100% Success
Even when you do everything right, some divisions simply won’t make it.
Think of splitting as a numbers game.
If you create five divisions from your lavender plant and four of them establish, that’s a fantastic success rate.
Don’t get discouraged by one or two failures, because you’ve still multiplied your lavender.
So, Can You Split Up a Lavender Plant?
Yes, you can split up a lavender plant, and it’s a rewarding gardening project when done with care.
You can split up a lavender plant to rejuvenate old growth, expand your garden, or share with friends.
The trick is to time your division for spring or autumn, always include healthy roots with each split, and never let the new plants sit in soggy soil.
We hope this guide answered your question about whether you can split up a lavender plant and gave you the confidence to try it in your own yard.
Happy gardening, and enjoy your new lavender plants.