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Yes, lavender and citronella can absolutely be planted together, and they make a surprisingly effective pairing in your garden.
If you’ve been wondering whether lavender and citronella can be planted together without one overshadowing the other, the answer is a confident yes.
These two aromatic plants share similar growing needs, and when you plant lavender and citronella together, you get a dual-purpose border that repels pests while adding beauty and fragrance.
In this post, we’ll explore why you can plant lavender and citronella together, the best conditions for them, potential challenges, and how to maximize their benefits in your outdoor space.
Let’s dig into the details of growing these two wonderful plants side by side.
Why Lavender and Citronella Can Be Planted Together
The main reason lavender and citronella can be planted together boils down to their compatible cultural preferences.
Both plants thrive in full sun, need well-draining soil, and prefer similar watering routines, which makes them easy companions in the same bed or container.
When you decide to plant lavender and citronella together, you’re also creating a natural pest-repelling zone because both release strong scents that mosquitoes and other insects dislike.
Here’s a deeper look at why this combination works so well.
1. Shared Sunlight and Heat Requirements
Lavender and citronella both crave at least six to eight hours of direct sunlight each day.
If you plant lavender and citronella together in a sunny spot, neither will compete for light because their needs are nearly identical.
Citronella, whether you’re growing true citronella grass or scented geraniums, loves warm conditions, and so does lavender.
This shared preference means you can plant lavender and citronella together in the same sunny border without worrying about one getting shaded out by the other.
Heat helps both release their essential oils, so the more sun they get, the stronger their fragrances and pest-deterring properties become.
2. Both Prefer Well-Drained Soil
One of the biggest mistakes gardeners make is overwatering, but when you plant lavender and citronella together, you can avoid that easily.
Lavender hates soggy roots and needs gritty, sandy soil that dries out quickly between waterings.
Citronella also dislikes standing water, though it’s a bit more tolerant of moisture than lavender.
To make sure lavender and citronella can be planted together successfully, amend your soil with coarse sand or perlite to improve drainage.
Raised beds or containers with drainage holes are perfect if your native soil is heavy clay.
When both plants sit in well-aerated soil, their root systems stay healthy and they won’t compete for the same water pockets.
3. Complementary Growth Habits
Lavender grows as a compact, woody shrub that stays low and bushy, usually reaching one to three feet tall.
Citronella, depending on the variety, can grow taller and more upright, with true citronella grass reaching four to six feet in warm climates.
Because of this height difference, you can plant lavender and citronella together without them crowding each other.
Place lavender at the front or edges of the bed, and let citronella rise behind it for a layered, lush look.
This spacing allows air to circulate around both plants, reducing the risk of fungal diseases that thrive in damp, still conditions.
4. Enhanced Pest-Repelling Power
While lavender is famous for repelling moths, fleas, and flies, citronella is the classic mosquito deterrent.
When you plant lavender and citronella together, you combine these scents into a powerful natural barrier around patios, seating areas, or garden entrances.
The fragrance of lavender contains linalool and camphor, while citronella contains citronellal and geraniol.
Together, these compounds confuse pests’ olfactory senses, making it harder for them to locate you or your plants.
So planting lavender and citronella together isn’t just about aesthetics; it’s a smart, chemical-free pest management strategy.
Best Conditions for Planting Lavender and Citronella Together
To give your lavender and citronella the best chance to flourish when planted together, pay attention to a few key environmental factors.
Even though they’re compatible, slight differences in their needs can be managed with a little planning.
Here’s what you need to prepare.
1. Soil pH and Fertility Levels
Lavender prefers slightly alkaline soil with a pH between 6.5 and 7.5.
Citronella is more flexible and tolerates neutral to slightly acidic soils, so you can aim for a pH around 6.8 to 7.0 to satisfy both.
Test your soil before planting lavender and citronella together so you can adjust it with lime if needed.
Avoid rich, heavily composted soil because lavender actually prefers lean conditions with low fertility.
Excess nitrogen will make lavender grow floppy with weak stems, while citronella will tolerate it better but won’t need it either.
Stick to a balanced, slow-release fertilizer at planting time, then skip feeding for the rest of the season.
2. Watering Schedules for Both Plants
When you plant lavender and citronella together, water them deeply but infrequently to encourage deep root growth.
Lavender needs the soil to dry out completely between waterings, so wait until the top inch feels dry before adding more.
Citronella likes slightly more consistent moisture, but it can handle short dry spells once established.
A good compromise is to water every seven to ten days, depending on rainfall and temperature.
Use drip irrigation or water at the base of the plants, avoiding the leaves to prevent mildew and rot.
Mulching with gravel or fine stones around lavender helps keep its roots dry, but keep mulch away from citronella’s stem to prevent collar rot.
3. Climate and Hardiness Zones
Lavender is a hardy perennial that thrives in USDA zones 5 through 9, enduring cold winters with good drainage.
Citronella, especially true Cymbopogon nardus, is tropical and only hardy in zones 10 through 12.
If you live in a cooler region, you can still plant lavender and citronella together by growing citronella in a large pot.
This way, you can move the citronella indoors during winter frosts while keeping lavender in the ground outdoors.
Alternatively, use lemon-scented geraniums as your citronella substitute, as these are hardy in zones 9 through 11 and can be overwintered indoors as well.
Just remember that the mosquito-repelling power of scented geraniums is lower than true citronella grass, but they still work when planted with lavender.
Potential Challenges When Planting Lavender and Citronella Together
No plant pairing is without a few hiccups, and lavender and citronella are no exception.
Here are the most common issues you might face and how to solve them.
1. Overwatering Risks from Citronella’s Thirst
Because citronella naturally wants more water than lavender, you might accidentally drown your lavender if you cater too much to citronella.
To avoid this, always check the soil’s dryness before watering, and err on the side of letting it dry out a bit more.
You can plant lavender and citronella together in separate containers side by side, which lets you water each according to its own needs.
If they’re in the same bed, place lavender slightly higher on a small mound or slope where water drains away faster.
2. Shading Issues as Citronella Grows Taller
Over time, citronella can grow tall and cast shade over your lavender, which will reduce flowering and oil production.
Prune citronella regularly to keep it bushy and under control, cutting it back by about one-third in early summer.
Position citronella on the north side of the lavender so it doesn’t block the afternoon sun from the lower-growing plants.
This simple orientation trick ensures that when you plant lavender and citronella together, both get adequate light throughout the day.
3. Different Cold Hardiness Needs
As mentioned earlier, lavender is far more cold-hardy than citronella, so winter care will differ significantly.
If you plant lavender and citronella together in the ground in a temperate zone, citronella will likely die back in winter.
Plan for this by treating citronella as an annual, or lift it and pot it up for indoor overwintering.
Lavender, on the other hand, can stay outside with a light mulch of straw or evergreen boughs for protection.
Knowing these differences upfront will save you the disappointment of finding a dead citronella come spring.
So, Can Lavender and Citronella Be Planted Together?
Yes, lavender and citronella can be planted together with great success under the right conditions.
You can plant lavender and citronella together because they share similar sunlight and drainage needs, and their differing heights create a beautiful, functional display.
By managing water carefully, providing full sun, and accounting for citronella’s lower cold hardiness, you’ll enjoy a fragrant, pest-repelling pairing all season long.
Whether you’re looking to protect your patio from mosquitoes or simply love the look of silvery lavender beside bright green citronella, this duo delivers on all fronts.
So go ahead and plant lavender and citronella together, and you’ll be rewarded with a healthier, more aromatic garden that works as hard as it looks.
Happy planting.