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A lavender plant can be split, and doing so is one of the best ways to keep it healthy and thriving.
Splitting lavender, also known as division, is a simple gardening technique that helps manage its size while giving you brand new plants for free.
If you have a lavender plant that’s looking woody in the center, struggling to bloom, or just taking over your garden bed, you can absolutely split it to solve those problems.
In this post, we’ll explore why you can split a lavender plant, when you should do it, and the step-by-step process to make sure your divisions survive.
Let’s dig in and get your lavender split the right way.
Why You Can Split A Lavender Plant
You can split a lavender plant because it responds well to root division when done at the right time and with proper care.
Splitting lavender isn’t quite as easy as splitting some other perennials like hostas, but it’s definitely possible with the right approach.
The key is understanding that lavender plants develop a woody base over time, and splitting lavender helps rejuvenate that growth.
Here’s what you need to know about why splitting a lavender plant works so well.
1. It Encourages Fresh, Healthy Growth
When you split a lavender plant, you’re essentially forcing it to regenerate new roots and shoots from each divided section.
Older lavender plants often become woody and sparse at the center, but splitting lavender stimulates the outer portions to grow more vigorously.
Each new plant you create from a lavender split has more energy to focus on producing lush foliage and fragrant flowers.
That’s because a smaller root system is easier for the plant to sustain, so it puts more effort into top growth.
So yes, you can split a lavender plant to breathe new life into an aging specimen.
2. It Controls the Size of Your Lavender
A lavender plant can be split to keep it from outgrowing its designated spot in your garden.
Lavender can spread quite wide, sometimes reaching three feet across, and that can crowd out neighboring plants.
When you split lavender, you reduce the overall footprint of the original plant while creating new plants to place elsewhere.
This is especially helpful if you’re growing lavender in a border, along a walkway, or in a container that’s become too tight.
Splitting a lavender plant gives you more control over your garden layout without losing any of your favorite plants.
3. You Can Multiply Your Lavender Collection
The most exciting reason to split a lavender plant is that you get more plants from one.
Instead of buying new lavender at the nursery, you can split your existing plant into several healthy divisions and expand your herb garden for free.
This is a cost-effective way to fill in gaps, create a lavender hedge, or share plants with friends and neighbors.
Each lavender split, if done correctly, will grow into a full-sized plant over the next season or two.
So splitting lavender isn’t just maintenance, it’s propagation in its simplest form.
When Should You Split A Lavender Plant?
You should split a lavender plant during its active growing season, typically in early spring or early fall.
These cooler periods give the divided roots time to establish before extreme heat or frost sets in.
If you split lavender in the heat of summer, the stress might be too much for the divisions to handle.
Here’s a closer look at the best timing for splitting lavender.
1. Early Spring Is Prime Time
As soon as new growth begins to appear at the base of your lavender plant in early spring, that’s your signal to split.
The soil is warming up, but the air is still cool, which helps prevent the divided lavender from losing too much moisture.
Splitting a lavender plant in spring gives the new divisions a full growing season to develop strong root systems.
This is the most reliable window for success when you split lavender.
2. Early Fall Works Too
You can also split a lavender plant in early fall after the hottest part of summer has passed.
This gives the divisions a few weeks to root in before winter dormancy arrives.
If you split lavender in fall, make sure to mulch around the new plants to protect them from freezing temperatures.
Fall splitting works best in mild climates where winters aren’t too brutal.
Avoid splitting lavender during its flowering period, as that’s when it’s using all its energy on blooms.
3. Signs Your Lavender Needs Splitting
If your lavender plant is looking tired, with lots of dead wood in the middle and fewer flowers each year, it’s time to split.
Another sign is when the plant has obviously outgrown its space, with branches sprawling over paths or nearby plants.
You can split a lavender plant every three to four years to maintain its vigor and appearance.
Don’t wait too long, because an extremely woody lavender plant may not split well at all.
Step-by-Step Guide to Splitting Lavender
Here’s how to split a lavender plant successfully, step by step, so you avoid damaging the roots.
The process is straightforward, but it does require a sharp tool and a gentle touch.
Follow these steps and you’ll be well on your way to more lavender.
1. Prepare the New Planting Spots
Before you split lavender, dig holes for each division in well-draining soil with plenty of sunlight.
Lavender hates wet feet, so amend heavy soil with sand or grit to improve drainage.
Space the new holes about 18 to 24 inches apart to give each lavender split room to grow.
2. Lift the Entire Plant Carefully
Water the lavender plant thoroughly a day before you plan to split it, as this softens the soil.
Using a garden fork, gently loosen the soil all around the plant, staying about six inches away from the base.
Lift the whole root ball out of the ground, trying to keep as many roots intact as possible.
Once it’s out, shake off the excess soil so you can see the root structure clearly.
3. Divide the Root Ball Into Sections
Look for natural divisions in the root ball where the lavender plant has separate stems or crowns.
Use a sharp, clean knife or spade to cut through the root ball, ensuring each section has both roots and foliage.
Each lavender split should be about the size of a fist, with at least a few healthy stems attached.
Trim away any dead or woody growth from the center to encourage the new roots to focus on fresh shoots.
4. Plant the Divisions Immediately
Place each lavender split into its prepared hole at the same depth it was growing originally.
Backfill with soil, firm it gently, and water well to settle the roots.
Keep the new divisions consistently moist for the first few weeks while they establish.
After that, you can treat them like any other lavender plant, with minimal watering and lots of sun.
Common Mistakes When You Split A Lavender Plant
Even though you can split a lavender plant successfully, there are a few pitfalls to watch out for.
Avoid these mistakes and your lavender split will thrive.
Here’s what not to do.
1. Splitting Old Woody Lavender
If your lavender plant is very old with a huge, woody center, splitting lavender might not work.
Woody lavender often fails to produce new roots from the old wood, so the divisions may just die.
In that case, it’s better to take softwood cuttings instead of trying to split the plant.
For best results, split lavender plants that are still relatively young, around two to three years old.
2. Splitting During the Wrong Season
Splitting a lavender plant in the middle of summer or during a hard freeze is asking for trouble.
The stress of division combined with extreme weather will likely kill the new plants.
Stick to early spring or early fall when temperatures are moderate and rainfall is more reliable.
3. Overwatering After You Split Lavender
After you split a lavender plant, you might be tempted to water it frequently, but that’s a mistake.
Lavender is drought-tolerant by nature, and too much water can cause root rot in your new divisions.
Water deeply once right after planting, then let the soil dry out between waterings.
Once the lavender split shows new growth, you can reduce watering significantly.
So, Can A Lavender Plant Be Split?
Yes, a lavender plant can be split, and it’s a rewarding way to rejuvenate your garden.
When you split lavender properly, you get healthier plants, better blooms, and more lavender to enjoy.
Just remember to split lavender in early spring or early fall, use a sharp tool, and plant each division in sunny, well-draining soil.
Avoid splitting older woody lavender plants, as they won’t recover well from a lavender split.
With the right timing and care, you can successfully split a lavender plant and watch your new divisions flourish.
So grab your garden fork, pick the right day, and give your lavender plant a fresh start by splitting it today.