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You can grow lavender in a mason jar, but it’s not as simple as dropping a seed in and hoping for the best.
Growing lavender in a mason jar is absolutely possible, yet it requires a bit of know-how because lavender is a plant that loves tough conditions.
If you have been wondering whether you can grow lavender in a mason jar, the short answer is yes, but you’ll need to mimic its natural Mediterranean environment.
In this post, we’ll dive into the details of growing lavender in a mason jar, including the best varieties, soil mixes, watering tricks, and common pitfalls to avoid.
Let’s explore how to make your mason jar lavender project a success.
Why You Can Grow Lavender in a Mason Jar
The key to growing lavender in a mason jar lies in understanding what this herb needs to thrive.
Lavender doesn’t want rich, moist soil like many other houseplants.
Instead, lavender craves sharp drainage, lots of sunlight, and airy roots.
A mason jar can actually be a great home for lavender if you set it up right, because it allows you to control the soil and water precisely.
1. The Right Lavender Varieties for Mason Jars
Not all lavender types are equal when you want to grow lavender in a mason jar.
English lavender (Lavandula angustifolia) is the best choice for container growing because it stays compact and handles life indoors well.
Spanish lavender and French lavender are more tender and often resent the confined root space of a mason jar.
Look for dwarf varieties like ‘Munstead’ or ‘Hidcote’ if you plan on growing lavender in a mason jar for the long haul.
These types stay smaller, which means they won’t outgrow your jar’s limited space as quickly.
2. Drainage Is Everything
When you grow lavender in a mason jar, the biggest mistake is ignoring drainage holes.
Mason jars are made of thick glass, so drilling holes is risky and often cracks the jar.
Instead, you can create a false bottom using a layer of pebbles or gravel, but honestly, that’s not enough for true drainage.
A better workaround is to grow lavender in a small nursery pot that fits inside the mason jar, allowing you to pull the pot out for watering.
This way, you can grow lavender in a mason jar visually, but the plant’s roots stay in a pot with drainage holes that prevents waterlogging.
Remember, lavender roots that sit in wet soil will rot within days.
3. The Perfect Soil Mix for Mason Jar Lavender
To grow lavender in a mason jar successfully, you need a gritty, alkaline soil mix.
Regular potting soil is too heavy and holds too much moisture for lavender.
Instead, mix one part potting soil with one part coarse sand or perlite, and add a handful of small gravel.
This mix mimics the rocky, sandy slopes where lavender naturally grows in the wild.
Also, lavender prefers a slightly alkaline pH, so you can add a tiny pinch of lime to the soil before planting.
If you’re growing lavender in a mason jar as a long-term project, refreshing this top layer each spring helps keep the soil structure loose.
How to Care for Lavender Growing in a Mason Jar
Once you’ve planted your lavender in a mason jar, the real work begins with consistent, careful care.
Lavender doesn’t need much fertilizer, and overfeeding will actually reduce the aromatic oils that make it smell so wonderful.
Here’s what you need to know to keep your mason jar lavender happy.
1. Watering Rules for Mason Jar Lavender
When you grow lavender in a mason jar, you must water deeply but infrequently.
Let the soil dry out completely between waterings, and then give it a thorough soak until water runs out of the nursery pot’s drainage holes.
In a mason jar without drainage, you’ll need to be extra cautious because excess water has nowhere to go.
A good rule of thumb is to check the soil with your finger; if it’s dry two inches down, it’s time to water.
During winter, when lavender is semi-dormant, cut watering back even further to prevent root rot.
2. Sunlight Needs for Indoor Lavender
Lavender is a sun worshipper and needs at least six to eight hours of direct sunlight daily.
If you’re growing lavender in a mason jar indoors, place it on a south-facing windowsill where it gets maximum light.
Without enough sun, your lavender will become leggy, pale, and stop producing those fragrant purple flowers.
If you don’t have a sunny window, you can supplement with a grow light placed just a few inches above the plant for about ten hours per day.
Remember that lavender in a mason jar will lean toward the light, so rotate the jar a quarter turn every week.
3. Pruning and Harvesting Lavender in a Jar
Regular pruning keeps your lavender in a mason jar bushy and prevents woody, bare stems.
After the first bloom in early summer, trim back the green growth by about one-third, but never cut into the old wood.
Harvest the flower stems when the buds first show color but before they fully open, that’s when the essential oil content is highest.
If you grow lavender in a mason jar for multiple seasons, you’ll need to repot every couple of years into a fresh soil mix and a slightly larger jar or pot.
Pruning not only keeps the plant healthy but also encourages a second flush of flowers in late summer.
Common Challenges When Growing Lavender in a Mason Jar
Even with the best intentions, growing lavender in a mason jar comes with a few frustrating hurdles.
Knowing what to expect can save you from losing your plant to common lavender killers.
1. Root Rot from Overwatering
Root rot is the number one reason people fail when they try to grow lavender in a mason jar.
Symptoms include yellowing leaves, a musty smell from the soil, and stems that turn black and mushy at the base.
Once root rot sets in, it’s usually fatal because lavender doesn’t recover well from damaged roots.
To avoid this, always err on the side of underwatering, as lavender is drought-tolerant and prefers a dry spell over a soggy one.
If you notice early signs, stop watering immediately and move the jar to a warmer, brighter spot to help the soil dry out faster.
2. Leggy Growth and Lack of Flowers
If your lavender in a mason jar looks stretched out and never blooms, it’s likely not getting enough sunlight.
Similarly, too much nitrogen fertilizer causes lush green leaves but zero flowers.
Switch to a low-nitrogen fertilizer or skip feeding altogether, as lavender thrives in poor soil.
Also, ensure your mason jar isn’t placed near a drafty window that keeps the soil too cool for root activity.
3. Humidity and Air Circulation Issues
Indoor air can be too humid or too still for lavender to thrive in a mason jar.
High humidity encourages fungal diseases like powdery mildew, which shows up as white spots on the leaves.
Place your jar in a room with good air movement, and avoid misting the foliage, as lavender hates wet leaves.
If your home is very humid, consider using a small fan to create gentle airflow around the plant.
So, Can You Grow Lavender in a Mason Jar?
Yes, you can grow lavender in a mason jar, but it requires patience and a strict routine.
Growing lavender in a mason jar works best when you prioritize drainage, sunlight, and infrequent watering above all else.
By choosing the right dwarf variety, using a gritty soil mix, and placing the jar in a sunny spot, you’ll have a better chance of success.
Remember that a mason jar lacks drainage holes, so using an inner pot is your safest bet to grow lavender in a mason jar without killing it.
Lavender may not be the easiest herb to keep in a glass jar, but the reward of fresh lavender blooms on your windowsill is worth the extra care.
So if you’re ready to give it a try, gather your supplies and start growing lavender in a mason jar today.
Your home will smell amazing, and you’ll have a beautiful, fragrant conversation piece to enjoy all season long.