How To Overwinter Lavender Indoors

You can overwinter lavender indoors successfully by bringing potted plants inside before the first frost and giving them a cool, sunny spot with very little water.
 
Lavender is a Mediterranean plant that hates wet feet and warm, stuffy rooms, so the trick to overwintering lavender indoors is to mimic its natural winter conditions as closely as possible.
 
If you’ve been wondering how to overwinter lavender indoors without killing your plant, you’re in the right place.
 
In this post, we’ll walk through when to bring lavender inside, what conditions it needs to overwinter lavender indoors, and the common mistakes that turn a healthy plant into a crispy stick by February.
 
Let’s get into it.
 

How to Overwinter Lavender Indoors

Overwintering lavender indoors comes down to three things: light, temperature, and water.
 
Get those right and your lavender will cruise through winter and burst back into growth in spring.
 

1. Start With the Right Plant

Not every lavender plant is a good candidate for overwintering lavender indoors.
 
English lavender (Lavandula angustifolia) handles cold and indoor conditions far better than tender varieties like Spanish or French lavender.
 
If your lavender is growing in the ground, you’ll need to dig it up carefully and pot it in well-draining soil before the first frost.
 
If it’s already in a container, you’re ahead of the game.
 

2. Bring It In at the Right Time

Timing matters when you overwinter lavender indoors.
 
You want to bring your lavender inside before the first hard freeze, but not so early that it never experiences the cool fall weather that signals winter is coming.
 
A light frost or two actually helps trigger dormancy, which is exactly what you want.
 
Just don’t wait until a deep freeze hits because cold damage plus the shock of moving indoors can be too much for the plant.
 

3. Give It Strong Light

Lavender needs at least six hours of direct sunlight a day, even in winter.
 
A south-facing window is your best bet when you overwinter lavender indoors.
 
If your windows are dim, a grow light is worth the investment.
 
Without enough light, lavender gets leggy, pale, and weak, and weak plants are the first to rot.
 

4. Keep It Cool

This is where most people go wrong when they overwinter lavender indoors.
 
Lavender doesn’t want a warm, cozy living room.
 
It wants cool temperatures between 40 and 50°F (4–10°C) during winter.
 
An unheated porch, a cool garage with a window, or a chilly spare bedroom works beautifully.
 
Warm indoor air dries the plant out, encourages pests, and stresses the roots.
 

Watering and Care When You Overwinter Lavender Indoors

Once your lavender is settled in, the care routine changes dramatically compared to summer.
 

1. Water Sparingly

Lavender is drought-tolerant, and when you overwinter lavender indoors, less is definitely more.
 
Let the soil dry out almost completely between waterings.
 
In a cool room, that might mean watering only once every two to three weeks.
 
Overwatering is the number one killer of indoor lavender in winter.
 

2. Skip the Fertilizer

Don’t feed lavender in winter.
 
Fertilizing encourages soft new growth that can’t survive low light and cool temps.
 
Hold off on fertilizer until you see fresh growth in early spring.
 

3. Watch for Pests and Humidity

Indoor air is often dry, but lavender still hates sitting in stagnant, humid conditions.
 
Good airflow around the plant keeps fungal issues like root rot and powdery mildew away.
 
Keep an eye out for spider mites and whiteflies, which love indoor plants in winter.
 

4. Prune Lightly, Not Hard

A light trim before bringing lavender inside helps it keep its shape.
 
But don’t cut into the woody stems because lavender doesn’t regrow from old wood.
 
Save the heavy pruning for spring after the danger of frost has passed.
 

Common Mistakes to Avoid When You Overwinter Lavender Indoors

A few habits will sabotage your efforts to overwinter lavender indoors.
 

1. Keeping It Too Warm

A warm room pushes lavender to grow when it should be resting.
 
That weak growth attracts pests and leads to a sad, spindly plant by spring.
 

2. Overwatering

Soggy soil plus cool temperatures equals root rot, and root rot is usually fatal.
 
When in doubt, don’t water.
 

3. Using a Pot Without Drainage

Lavender needs a container with drainage holes and a gritty, sandy potting mix.
 
Standing water at the bottom of a pot is a death sentence for the roots.
 

So, How Do You Overwinter Lavender Indoors?

You overwinter lavender indoors by bringing it in before a hard freeze, placing it in a cool, sunny spot, and watering it sparingly all winter long.
 
Lavender doesn’t need much from you during the colder months.
 
It just needs light, cool air, and dry soil.
 
Get those three right and you’ll be able to overwinter lavender indoors year after year without losing a single plant.
 
Your lavender will thank you with a strong, fragrant comeback in spring.