Lavender grows best outdoors, but you can also keep these aromatic gems alive over the winter. Plus, lavender is not only pretty, but also brings a sense of calm to every room. Here are some lovely lavender varieties and advice on how to overwinter lavender.
Meet the Lavenders
A fragrant and colorful plant native to Europe and Western Asia, lavender is a sun-loving flower best grown outdoors. Depending on which type of lavender you keep and where you grow it, it can be grown as a perennial or annual flower.
English lavender (Lavandula angustifolia) is the most common species available, and is quite hardy. We grow a variety called ‘Hidcote’ that has dark purple flowers. Despite its name, this plant is not native to England; it stems from the warm, Mediterranean coast of Europe.
English lavender is hardy in Zones 5 and warmer, usually overwintering in the ground outside just fine without any added protection. In an open winter with no snow cover, we may pile a thin layer (1 to 2 inches) of straw or shredded leaves over them for added cover.
Spanish lavender (L. stoechas) and fringed or French lavender (L. dentata) are much more tender—hardy outdoors only in Zone 8 and warmer. They have to be moved indoors to survive the winter in colder zones. The good news is that lavenders are fairly compact plants that grow well in containers, which makes moving them between indoors and outdoors quite easy.
If you are re-potting them, don’t use too large a pot. Only give them an extra inch of soil around the root ball. Too much extra soil will just stay soggy, which these plants won’t tolerate. The soil does not have to be rich, either. Two parts potting soil with one part perlite or coarse sand will give them the quick draining conditions they need. To mimic the alkaline soil of the Mediterranean, add 1 teaspoon of lime to the bag of potting mix before using it in the lavenders’ pots.
Spanish lavender is sometimes called “rabbit ears” for its unusual blossom.
How to Overwinter Lavender Indoors & Outdoors
As mentioned above, English lavender is winter-hardy to Zone 5 and may only need a bit of help in the form of a thin layer of straw. Otherwise, lavender shouldn’t need any extra care outdoors. Spanish and French lavenders, on the other hand, are only hardy to Zone 8, and will need to be brought indoors in colder areas.
During winter, the plants want to rest and will not produce much, if any, new growth. They are basically dormant from September until April.
While your lavender is indoors for winter, follow these practices:
- Watering: They need less water in winter, too; wait until the top inch of soil feels dry before giving them a drink. Overwatering will rot the roots and means sure death.
- Lighting: Although they won’t be actively growing, these plants will still need a lot of light. If you lack a spot on a cool, bright windowsill, try using a grow-light to supplement the natural light.
- Temperature: During winter, lavenders like it cool but not drafty; the temperature can drop to as low as 40°F (5°C) at night and shouldn’t be warmer than 65°F (18°C) during the day. This means that you ought to keep them away from heaters that will dry them out and drafty windows that could chill them too much.
- Fertilizing: The plants may look a little sad, but do not fertilize them until new growth starts in the spring. Unused nutrients can build up in the soil and become toxic.
The leaves of fringed (French) lavender (Lavandula dentata) have toothed edges.
Even though your plant is resting, the foliage is still fragrant and will smell lovely when you brush against it. The relaxing, anti-depressant qualities of its aroma will be a welcome reminder of summer and help to get you through the long winter ahead.
Come spring, wait until your last spring frost has passed and nighttime temperatures remain above 50°F (10°C) to plant lavender outdoors again. Also don’t forget to harden them off before exposing them to full sun and cool spring temperatures!
Lavender is more than a pretty plant. See lavender’s uses for health and home.
Reader Comments
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Snow covered lavender
We have had a higher than normal snowfall this year, my lavender plants have been covered in 3 feet of snow for all of February. Will they survive? In past years, small amounts of snow have not impacted.
Wintering Potted Lavender
My potted lavender has been brought indoors for the winter. It has a lot of new growth on it. Will it still be viable in the spring?
Thanks.
If your lavender has not
If your lavender has not decided that it is time for a rest then by all means keep it growing. It might throw off its blossoming time but I don’t think I would try to force it into hibernation.
wintering lavendar
Thank you for this blog! This may be a novice question, but when you suggest 2 inches of straw or leaves, I am guessing you mean over the ground and roots, and not the full plant? Sorry it this should be obvious! I have had a lavendar plant outside for close to 6 years, but it seems to die back just about every year and start anew each spring. Last winter was unusually mild with no snow, and this summer I had a thriving lavendar with flowers a plenty! So I'm hoping to keep that up this winter!
Another question - is Nov a good time to plant the seeds from my lavendar? I would like to try to grow more in the same raised bed, and thought I might spread the seeds nearby and see if they take. thanks again!
Hi Peggy, You are correct in
Hi Peggy, You are correct in assuming that the mulch goes on the ground around the plant, preferably after the ground has frozen. This will help prevent the freeze/thaw cycle which can damage the roots. Sorry not to have seen your post sooner. If you went ahead and scattered your seeds, keep an eye out in the spring for those seedlings. If not, you can sow them in the house and move them outside this spring. I prefer to start the seeds indoors because it gives me more control over their environment.
wintering lavender
Is it best to cut the English lavender back in fall to over winter the plant here in southwest IA?
It is thought to be best not
It is thought to be best not to cut the plants back in the fall. Wait until new growth starts in the spring before pruning and then remove only dead tips without cutting into the old wood.This will stimulate new growth and more flowers. If you want to reshape the plant you can cut it back by up to a third after flowering, when you deadhead.
Lavender
Don't bring it indoors if you have cats it is toxic to them and don't make lavender oil either.
Good Info
Thanks for letting me know. I have 3 cats inside. Wouldn't want anything to happen to my furry friends! : )