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Yes, you can separate a lavender plant, and it’s one of the best ways to keep your lavender thriving for years.
If you’ve been wondering whether you can separate a lavender plant to make more of them or just to keep an overgrown bush healthy, the answer is a confident yes.
You can separate a lavender plant successfully, but there are a few important rules to follow so you don’t shock the roots or lose the whole plant.
In this post, we’ll cover when you can separate a lavender plant, how to do it step by step, and what to do after you’ve separated your lavender to ensure it grows strong.
Let’s dig in and get your lavender splitting project started on the right foot.
Why You Can Separate A Lavender Plant And When To Do It
You can separate a lavender plant for many reasons, but timing is everything when you split lavender.
Lavender plants are woody perennials, which means their older stems become hard and less flexible over time.
When you separate a lavender plant, you’re essentially dividing the root ball into smaller sections, each with its own share of roots and shoots.
The best time to separate a lavender plant is in early spring or early fall when the weather is cool and the plant isn’t focused on blooming.
Splitting lavender during a heatwave or while it’s flowering puts way too much stress on the plant, so always aim for a mild, overcast day.
1. The Age Of Your Lavender Matters For Separation
Young lavender plants, under two or three years old, are usually not ready to be divided.
When you try to separate a lavender plant that’s too young, you often end up with weak, tiny divisions that struggle to survive.
Older lavender plants, especially ones that have become woody and bare in the center, can actually benefit from being separated.
So if your lavender is at least three years old and looking a bit tired, you can separate a lavender plant to rejuvenate it.
2. Why You Can Separate A Lavender Plant Instead Of Buying New Ones
If you love the scent and look of your current lavender variety, you can separate a lavender plant to create exact clones of that same variety.
This is a huge advantage over growing lavender from seed because seedlings might not look or smell like the parent plant.
By dividing, every new section you get will share the same genetics, meaning the same flower color, fragrance, and growth habits.
You can separate a lavender plant to fill a whole new garden bed without spending a single penny on new plants.
3. Signs That You Should Separate A Lavender Plant
How do you know if your lavender really needs dividing in the first place?
If the center of your lavender looks dead and woody while only the outer edges have green growth, that’s a major sign.
Also, if your lavender has become so large that it’s crowding out neighboring plants, you can separate a lavender plant to give everyone more breathing room.
Poor flowering even though the plant gets plenty of sun and well-drained soil can also mean it’s time to split it.
How To Separate A Lavender Plant Step By Step
Once you’ve decided the time is right, you need to know exactly how to separate a lavender plant without damaging the roots.
This process is straightforward, but you do need a sharp spade or a sturdy garden knife and a gentle hand.
1. Water The Lavender Before You Split It
A day before you plan to separate a lavender plant, give it a good, deep watering.
Moist soil makes the roots more flexible and helps them hold onto the soil better during the division process.
Dry, dusty soil will crumble away from the roots, which increases the risk of root damage when you dig.
So don’t skip this step because hydrated lavender is much easier to separate successfully.
2. Dig Around The Entire Root Ball
Using your spade, dig a circle around the lavender plant, staying about six to eight inches away from the main stems.
This ensures you’re capturing a good amount of the root system so you can separate a lavender plant with plenty of roots attached to each section.
Once you’ve loosened the soil all around the plant, gently lift the whole root ball out of the ground.
Shake off some of the loose soil so you can clearly see where the natural divisions are in the roots.
3. Split The Root Ball Into Sections
Now comes the main event, so look closely at the root ball to find existing gaps or natural points where you can separate a lavender plant into smaller pieces.
If the roots are tangled and you can’t pull them apart by hand, use your sharp knife or spade to cut cleanly through the root ball.
Each section you cut should have at least a few healthy stems and a decent cluster of roots attached.
You can separate a lavender plant into two, three, or even four sections depending on the original size of the plant.
4. Trim The Woody Stems
Before replanting, take a look at each new lavender section and trim back any dead, woody, or overly long stems.
Cutting the stems back by about a third helps balance the top growth with the reduced root system.
When you separate a lavender plant, the roots can’t support as much foliage initially, so a light trim reduces water loss.
This simple step greatly increases the chances that each separated lavender section will survive the transplant shock.
Best Practices After You Separate A Lavender Plant
Your work isn’t done just because you’ve made the cuts, because proper aftercare is what really determines success.
1. Replant Immediately In Well-Drained Soil
After you separate a lavender plant, the roots should not be left sitting in the open air for a long time.
Replant each section right away in fresh, well-draining soil, preferably mixed with a little grit or sand.
Lavender hates wet feet, so make sure your planting holes aren’t in a spot that collects standing water.
2. Water Gently But Don’t Overwater
Right after you separate a lavender plant, give each new section a nice drink of water to settle the soil around the roots.
After that initial watering, let the soil dry out slightly before watering again.
Too much water after separating lavender can cause root rot, which is one of the most common reasons divided plants fail.
3. Provide Some Shade For The First Week
If you separate a lavender plant during a sunny spell, try to shield the new divisions from harsh afternoon sun for about a week.
You could use a shade cloth, or even a temporary umbrella, to cut down the stress while the roots establish.
Once new growth appears, you can remove the shade just like you would for any new transplant.
4. Skip The Fertilizer For Now
Lavender thrives in lean soil, so you don’t need rich compost or fertilizer right after division.
When you separate a lavender plant, the roots are sensitive and fertilizer can actually burn them.
Wait at least a month before giving your lavender any kind of feed, and even then, only use a low-nitrogen organic option.
Too much nitrogen will give you lush leaves but very few of those fragrant flowers you’re after.
So, Can You Separate A Lavender Plant Successfully?
Yes, you can separate a lavender plant successfully as long as you divide the right plant at the right time and you handle the roots with care.
You can separate a lavender plant that’s mature, healthy, and actively growing, and you’ll greatly boost your chances by splitting in early spring or early fall.
You can also separate a lavender plant that’s become too woody or too big, which is a great way to refresh its vigor.
Just remember to keep the soil well-drained, avoid overwatering, and resist the urge to fertilize too soon after splitting.
Keep those new lavender divisions in a sunny spot, and before you know it, you’ll have a whole new row of fragrant lavender all from one original bush.