How To Keep Lavender Purple

To keep lavender purple, you need to focus on three main things: sunlight, soil, and pruning.
 
Lavender is famous for its soothing purple blooms and silvery-green foliage.
 
But if you’ve ever noticed your lavender turning gray, brown, or even reverting to green, you’re not alone.
 
Many gardeners ask, “How do I keep my lavender purple?” and the answer is simpler than you might think.
 
The key to keeping lavender purple is understanding what the plant needs to thrive and produce those vibrant flower spikes.
 
In this post, we’ll explore the best ways to keep lavender purple, from choosing the right variety to caring for it season after season.
 
Let’s dive in.
 

Why Lavender Turns Brown or Green (And How to Keep It Purple)

Lavender turns brown or green when it’s stressed, and stressed lavender won’t stay purple.
 
Here are the main reasons your lavender might lose its purple color, and what you can do to keep lavender purple instead.
 

1. Too Much Water or Poor Drainage

Lavender is a Mediterranean plant that hates wet feet.
 
If the soil stays soggy, the roots rot, and the plant turns brown or gray instead of purple.
 
To keep lavender purple, plant it in well-draining soil, ideally on a slope or in a raised bed.
 
Water deeply but infrequently, and let the soil dry out between waterings.
 

2. Not Enough Sunlight

Lavender needs at least six to eight hours of direct sun daily to produce those rich purple blooms.
 
Without enough sun, the plant becomes leggy, the flowers fade, and you’ll struggle to keep lavender purple.
 
So pick the sunniest spot in your garden, and avoid shady areas.
 

3. The Wrong Soil pH

Lavender prefers slightly alkaline soil with a pH between 6.7 and 7.3.
 
If your soil is too acidic, the plant can’t absorb nutrients properly, and the blooms lose their color.
 
Add a little lime to raise the pH, and you’ll be well on your way to keep lavender purple.
 

4. Overcrowding and Poor Airflow

When lavender is crowded, it’s more prone to fungal diseases that turn the flowers brown.
 
Space your plants about two to three feet apart, and prune nearby foliage to improve airflow.
 
Good airflow helps keep lavender purple by reducing moisture on the leaves and flowers.
 

Best Practices to Keep Lavender Purple All Season

Once you’ve fixed the basics, these habits will help you keep lavender purple from spring through fall.
 

1. Prune Regularly (But Not Too Late)

Pruning encourages fresh growth and more blooms.
 
Cut back about one-third of the plant after the first flush of flowers fades.
 
But don’t prune in late fall, as new growth may not survive the winter, and that can ruin your chances to keep lavender purple next year.
 

2. Deadhead Spent Blooms

Removing faded flowers redirects energy into new buds.
 
Simply snip off the old flower spikes, and the plant will reward you with more purple blooms.
 
This simple step is one of the easiest ways to keep lavender purple.
 

3. Fertilize Lightly

Lavender doesn’t need much food.
 
Too much nitrogen makes it grow leafy and green, sacrificing the purple flowers.
 
Use a light application of compost or a low-nitrogen fertilizer in early spring to keep lavender purple without overdoing it.
 

4. Choose the Right Variety

Some lavender varieties hold their color better than others.
 
English lavender (Lavandula angustifolia) is known for its deep purple blooms and strong fragrance.
 
French and Spanish lavenders are beautiful, but they may need extra care to keep lavender purple in cooler climates.
 

5. Protect from Extreme Cold

Freezing temperatures can turn lavender brown and kill the roots.
 
If you live in a cold region, mulch around the base in winter, but keep the mulch away from the crown to prevent rot.
 
Potted lavender should be brought indoors or into a sheltered spot to keep lavender purple year after year.
 

Common Mistakes That Turn Lavender Brown

Even careful gardeners make mistakes that ruin the purple color.
 
Here are a few to avoid if you want to keep lavender purple.
 

1. Watering from Above

Overhead watering wets the foliage and flowers, which encourages mold and turns blooms brown.
 
Water at the base of the plant instead, and you’ll keep lavender purple much more easily.
 

2. Using Rich, Heavy Mulch

Heavy mulches like wood chips hold moisture against the stems and can cause rot.
 
Use gravel or sand as a mulch instead, which reflects heat and keeps the plant dry.
 
This is a small change that makes a big difference when you want to keep lavender purple.
 

3. Harvesting Too Late

If you wait too long to harvest the flowers, they’ll start to fade on the plant.
 
Cut them when the buds are just opening, and you’ll preserve the brightest purple color.
 
Regular harvesting actually encourages more blooms, so you can keep lavender purple all season long.
 

So, How Do You Keep Lavender Purple?

You keep lavender purple by giving it plenty of sun, well-draining soil, and careful pruning.
 
Avoid overwatering, overcrowding, and too much fertilizer, and your lavender will reward you with vibrant purple blooms.
 
Remember, the key to keep lavender purple is to mimic its natural Mediterranean habitat: dry, sunny, and lean.
 
With these tips, you’ll enjoy that gorgeous purple color from early summer right through to fall.
 
Happy gardening!