Not enough light. It is an outdoor plant that loves full sun. It also hates regular potting soil -- which by the way looks overly dry. Needs a lean, well-draining container mix if that is where you are going to keep it.

FataMorgana

Thank you Fatamorgana!
My appartment is facing north west... I keep it on my west facing windowsill. Would that be enough?
Yah, the soil is a tid bid dry atm... I forgot to water them the last few days. These plants seems to drink a lot! :)

Baby plants do drink a lot. Lavender, like other arid herbs need to have well drained soil, but a young plant does need consistent watering too. It's a very fine balance between enough water, and too much leading to root rot, which your pic may indicate. One of the more difficult plants for pot culture, but it can be done. What is your purpose for the plant? Do you just like lavender for the plant, or are you trying to have for harvest, etc.

Your window will probably not provide enough light for the plant to really thrive--may be enough for wintering over though. You don't list where you're at--how strong is your winter sunlight. Also, lavender is really a small woody shrub, and if you do get it to thrive, that pot looks much too small.

Hi Balloonflower, I'm in Toronto Canada. Our winter would be mostly overcast type of weather. I like to have my lavender plant used for cooking, baking or making pot pouri. I know the container it's in might be too small when it grows bigger. When that time comes, I do plant to re-pot it to a larger pot.

IMO the time has already come to repot although it's probably best to wait until spring. Have you no outdoors space at all to put it in mild weather? Not even a window sill? It will always be sickly inside.

Since you are in Toronto, I believe your hardiness zone is a 5 or a 6. If that is the case, next spring/summer get a hardy english lavender like "Munstead" and plant it in a sunny, very well-draining location. I'm your neighbor just to the south (Western NY State) in a similar hardiness zone and munstead does wonderful for me year after year. While you can have something indoors for the winter, in the long run you'll be happier with a plant grown outside.

FataMorgana

You may want to consider getting a small plant light to supplement if there's not a better light source for it. It can be pot grown, (and mine live all winter in my basement with lights). Just watch the watering--that's what will get you. Don't give up! I love using lav leaf in cooking for a nice flavor without the overpowering that the buds can provide.

Thanks guys for your advice!

I have a balcony that faces North... So, it doesn't get much direct sun light (if at all...) like the south or east facing units. And I'm on 24th floor and it gets very windy some days. I'm afraid the wind will constantly knock the pot down or something.

I'll definitely consider repotting it to a bigger pot. Either spring or until it gets to a healthier/stronger state... (Fingers crossed...)

I'll also consider the Munstead. Hope I can find it in local nursery. One thing I find it tough is, most places they don't specify the specific "breed?" of the plant. Maybe I'll have better chance finding that specific breed at a nursery.

If my plant's condition doesn't improve much, I guess I have no choice but to use plant light on it. I'll definitely keep that option in mind.

Be sure to visit near by (for you) Richters! It is in Goodwood, Ontario. It is a favorite herb seed and plant nursery for many - including myself. They have many named varieties of lavender available.

FataMorgana

Here is a link that might be useful: Richters