Pruning your lavender is the secret to a bushy plant and a spectacular floral display. By cutting back your lavender at the right time and in the right way, you prevent woody, leggy growth and encourage fresh, healthy shoots. Follow these simple steps to learn how to prune a lavender plant successfully year after year.
Key Takeaways
- Timing is everything: Prune lavender in early spring or right after the first bloom for the best results.
- Avoid the wood: Never cut into the bare, brown woody stems, as they will not regrow.
- Shape matters: Trim the plant into a neat mound to promote airflow and bushy growth.
- Spring vs. Fall: Spring pruning shapes the plant, while fall pruning should only be a light tidy-up.
- Use sharp tools: Always use clean, sharp shears to prevent disease and jagged cuts.
- Regular pruning is key: Pruning every year prevents the plant from becoming too woody and dying out.
📑 Table of Contents
Introduction
Is your lavender plant looking a bit leggy and woody? Do you miss those tight, bushy mounds of fragrant green leaves and vibrant purple flowers? If so, it is time to give your plant a good haircut. Learning how to prune a lavender plant is the single most important skill you can learn to keep it healthy and blooming.
Many gardeners are scared to cut back their herbs. But lavender loves a hard trim! If you ignore it, the stems will turn into bare sticks, and the plant will split open in the middle. Pruning encourages fresh growth, keeps a nice shape, and prevents the plant from dying out.
In this guide, we will walk you through exactly how to prune a lavender plant for bushy growth and blooms. Grab your gardening gloves and your shears, and let us get started!
Why You Must Prune Lavender
Preventing Woody Growth
Lavender is a semi-shrub. This means it grows soft, green leaves on top, but the stems at the bottom become hard and woody over time. If you do not prune it every year, all the green leaves will end up on the tips of long, bare sticks. The plant will look ugly and fall apart.
Encouraging Bushy Growth
When you trim the soft green tips, the plant wakes up. It pushes out new side shoots from the base. This makes the plant much fuller and bushier. A bushy plant also has better airflow, which stops fungal diseases from taking hold.
Boosting Flower Production
Want more of those fragrant blooms? Pruning does the trick! Lavender flowers on new growth. If you trim the plant, you get more stems, and more stems mean more flowers. It is that simple. To learn more about the blooms themselves, check out our guide on the flower lavender plant.
When to Prune Lavender
The Main Spring Pruning
The best time to do your main pruning is early spring. Wait until you see tiny green shoots appearing at the base of the plant. This means the plant is waking up from winter dormancy. A spring trim sets the stage for summer blooms. If you want to prune a lavender plant successfully, spring is your moment.
The Summer Deadheading
After the first big flush of flowers fades, usually in late summer, you can give the plant a light trim. This is called deadheading. You simply cut off the spent flower stems. This often encourages a second, smaller bloom in the fall.
Why You Should Avoid Fall Pruning
Never do a heavy prune in the late fall. Cutting back into the wood right before winter leaves the plant vulnerable. The cold weather can damage the fresh cuts, and the plant might not survive the frost. Just tidy up any dead bits in the fall, and save the big cut for spring.
Tools You Need to Prune a Lavender Plant
Bypass Pruners or Shears
You need a sharp, clean pair of bypass pruners. Bypass blades make clean cuts without crushing the stems. Avoid anvil pruners, as they can crush the soft green stems and cause damage.
Hedge Shears for Big Bushes
If you have a massive lavender hedge, using hand pruners will take forever. Hedge shears let you shape the whole plant quickly. Just be careful not to cut too deep into the wood when using them.
Gloves and Safety Glasses
Lavender stems can be tough and scratchy. Wear thick gardening gloves to protect your hands. Safety glasses are also a good idea to keep tiny wood chips out of your eyes.
Step-by-Step Guide to Pruning
Step 1: Clean Your Tools
Always wipe your blades with rubbing alcohol before you start. This stops you from spreading diseases between your plants.
Step 2: Gather the Stems
Gently gather the stems into a loose bundle. This makes it much easier to cut the plant into a nice, even shape.
Step 3: Find the Green Growth
Look closely at the stem. You will see brown, woody growth at the bottom, and soft, green growth at the top. You must keep some of that green growth on the plant.
Step 4: Make Your Cuts
Cut about one to two inches into the soft green part of the stems. This usually means you are cutting off about a third of the plant. Never cut down into the bare brown wood. If you do, that stem will not grow back.
Step 5: Shape the Mound
Your goal is a nice, rounded mound shape. Round tops shed rain and snow easily, which keeps the plant healthy. Flat tops can collect water and cause the wood to rot. If your plant is in a pot and needs more space, this is also a great time to learn how to repot a plant.
Pruning Different Types of Lavender
English Lavender
English lavender is the most common type. It has long stems and a lovely fragrance. It responds very well to pruning. You can cut it back by a third without any issues.
French Lavender
French lavender has little butterfly-like petals on top of the spike. It is a bit more tender and does not get as woody. Give it a light trim after blooming to keep its shape.
Spanish Lavender
Spanish lavender has distinctive rabbit-ear bracts at the top. It is the most sensitive to heavy pruning. Only trim it lightly to remove the spent flowers and keep the mound shape.
Common Pruning Mistakes to Avoid
Cutting Into the Old Wood
This is the biggest mistake gardeners make. If you cut into the brown, leafless wood, it will stay bare. Always leave a nice cushion of green leaves on the plant.
Waiting Too Long
Letting a lavender plant go unpruned for three or four years is a death sentence. The wood takes over, and the plant dies. Prune every single year without fail.
Using Dull Blades
Dull blades crush the stems, leaving them open to disease. Keep your shears sharp and clean.
Conclusion
Learning how to prune a lavender plant is easier than you think. By trimming your plant every spring, you will keep it looking young, bushy, and full of flowers. Remember to always leave some green growth, never cut into the old wood, and keep your tools sharp. With a little bit of effort, your lavender will reward you with stunning blooms and that classic, relaxing scent all summer long. For more tips on keeping your plant happy, check out our lavender plant care guide. Happy pruning!
Frequently Asked Questions
Can I prune lavender in the winter?
You should avoid heavy pruning in the winter. Cold weather can damage the fresh cuts and kill the plant. Just tidy up any dead stems in late winter, and wait for spring for the main trim.
What happens if I never prune my lavender?
If you never prune your lavender, it will become very woody and leggy. The plant will split open in the middle, produce fewer flowers, and eventually die out because the old wood cannot support new growth.
How far back can I cut my lavender?
You should only cut back into the soft, green growth, usually about a third of the plant. Never cut into the bare, brown woody stems because they will not produce new leaves or shoots.
Can I use regular scissors to prune lavender?
It is best to use bypass pruners or hedge shears. Regular scissors can crush the stems, which makes the plant vulnerable to disease. Always make sure your tools are sharp and clean.
Should I prune lavender after it blooms?
Yes, you should do a light trim after the first bloom fades in late summer. This removes the spent flowers and often encourages a second, smaller bloom in the early fall.
Why is my lavender plant dying after pruning?
Your plant might be dying because you cut too far into the old wood, or you pruned too late in the season. Always leave plenty of green growth and do your main pruning in the early spring.