How to Grow Lemongrass-Indoors or Out

If you are reading this, then you probably already know about the myriad uses for lemongrass, both in your own kitchen and in the kitchens of the best chefs. You also no doubt know that the lemon-grass herb plant is used widely in the perfume industry, but also as a natural mosquito repellent and as a calming, medicinal herb. It can, of course, be used dried or powdered, but it is when lemongrass is fresh that that lemony essence is most pronounced.

But finding it in your local grocery store can be a challenge, if not an impossible feat, not to mention the expense and the waste from having to purchase so much at one time when only a small amount is necessary.

The solution? Grow it yourself!

lemongrass herb plant growing outside

Lemon Grass is actually really easy to grow! First of all, it is a perennial, which means that it will come back year after year in many climates, growing all year long in the warmest ones. It also lends itself well to both growing outside and inside, so where it is the coldest or when you want to have fresh lemongrass year round, you can move it indoors or outside as needed.

Growing Lemongrass Outside

Lemongrass is actually a tropical plant, so those of you who have warm weather year round can easily grow lemon-grass plants as part of your landscape. In ideal conditions lemon grass will reach 3 to 6-foot high and do double-duty as a decorative ornamental grass. Lemon grass forms a rhizome, or bulb, but does not aggressively spread, so normal harvesting and occasionally cutting back of the longest top growth will satisfy the more formal gardener, though most people will just let it grow au’naturalle to wave in the breezes.

Lemongrass prefers sandy, well-drained and fertile soil, though it will grow well in all but the heaviest or constantly wet soils. Sun, on the other hand, is a must. Plant it in the sunniest location, unless you live in the desert, where lemongrass will prefer partially shaded afternoons. Most herbs (lemongrass is no exception) prefer to have constant moisture, so don’t allow it to dry out completely between waterings. In the desert, your lemongrass plants will benefit from heavy misting in the morning.

Your lemon grass plant will also thrive beautifully with regular feeding, once monthly or so, of a nitrogen-based fertilizer, such as High-Yield Garden Fertilizer 8-10-8, though this may not be necessary if you plant your lemongrass in beds that you compost or add organic materials to regularly. If however, you grow your lemongrass in a pot, fertilizing will be needed. As always, mulching will retard weed growth while maintaining moisture around your lemon grass plants.

Growing Lemongrass Indoors

Lemongrass growing indoors

Lemongrass is very adaptable to growing indoors, though it will do its best when allowed to breathe outside during the warm seasons. Due to its potential size, you should plant it in a pot equal to or close to five gallons and in the sunniest location possible, preferably in a south or southwest facing unobstructed window. Lemon grass plants can be kept under control and grown in a smaller pot by harvesting more often, which means removing the stalks, bulb and all, along the outside of the plant. You can always pass these along to friends or even take them to your local farmer’s market if you have an abundance. Lemongrass plants that are kept exclusively indoors have been known to adapt their size to smaller pots, though the harvest potential, of course, won’t be as large. You should also regularly feed your indoor plants, being even more diligent when they are in smaller pots. The potted lemongrass plants will quickly deplete nutrients, as do any potted plants, and rely upon you for their sustenance. Soil condition also deteriorates over time, so amending your potted plants’ soil with Earthworm Castings on a regular basis will prevent you from having to re-pot again and again. And watering will usually be more frequent. Depending upon the size of the pot and the size of the plant, you may have to water 2 to 3 times a week to maintain a good moisture level for healthy growth. If this sounds like too much work or you are contemplating a vacation, then work Terra Sorb into your soil.

And Finally You Harvest!

First, be aware that most insects will turn their nose up at this pleasant lemony scent, but that cats seem to find it most attractive. Lemongrass plants are naturally pest resistant, but other methods may need to be utilized to fend off the neighborhood feline prowlers.

Now, you can start trimming leaves (for tea and soups) once the plant is at least one foot tall; if you like a clipped and uniform appearance, you can keep the top cut and dry what you don’t use right away. The snipping also releases more of the lemony essence, so cutting before a get together can be beneficial. You can start harvesting the stalks when they are at least 1/2-inch in diameter. You should always use a sharp knife to cut them off at the level of the soil, rather than trying to break them off or pulling them up, as you can inadvertently damage the rest  of the plant.

Lemongrass stalks after being harvested

The outside leaves are usually tough and may have to be removed before use, though bruising them and adding them to recipes, and then removing them before serving, is common practice. The lemony essence is quite strong, so start with very small amounts before adding more. Entire stalks can be kept in the fridge for several days by keeping them in a plastic bag with a damp paper towel. Some people also chop pieces of the stalks and freeze it for later use. The leaves preserve best when dried.

If you have further questions about growing lemongrass or any other gardening questions, you are welcome to Ask Our Master Gardener, a service that is completely free and always helpful.

Happy Gardening!

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40 Comments

  • Reply
    J.P.I.
    March 13, 2013 at 3:42 pm

    Hello, I’m looking for information on how to grow lemongrass here in South Carolina. I can also grow it indoors, if it will grow there. I’ve got the space. But where do I locate the lemongrass seeds? Thanks, J.P.I.

  • Reply
    Karen
    March 15, 2013 at 3:28 pm

    J.P., you can grow lemongrass outdoors and according to your Zip Code you are in Hardiness Zone 8a, which means it should most likely remain as a perennial plant, although if you have the threat of a severe winter you might want to protect it with some extra mulch around the root system, or dig it up and bring inside. If you want to grow it indoors it would need a sunny and warm location away from drafts and heating/air conditioning vents. Soil and water conditions would be the same as outside.

    Lemongrass prefers full sun and some room. A mature plant can reach 6 feet in height and be up to 40 inches wide. It wants a well-drained, loamy soil, so make sure you don’t have heavy clay, or that water does not stand in the area you’re planting. If you can check the pH it should range between 5.1 and 8.5. It doesn’t like to dry out, either, so it will need to receive even moisture throughout the summer growing season. You could also grow it in a pot, which would keep it at a slightly smaller size.

    We do not carry the seeds but we do sell the East Indian Lemongrass (cymbopogon flexuosus) variety plant on our website. They are beautiful, healthy starts that will get you harvesting sooner.

    Happy Gardening,
    Karen

  • Reply
    Justina
    January 23, 2014 at 4:13 pm

    I have a lemongrass plant that is full grown and has seed. I am trying to figure out what I can do with the seeds, how to dry them and prepare for seed or tea. Do you have any recommendations or videos?

    Thanks

    • Reply
      Karen
      January 28, 2014 at 4:27 pm

      Saving the seed from lemongrass would be like saving any other seed. Make sure it has matured and then save it in a cool, dry location. While it can be sown from seed, it is usually easier and more successfully propagated from cuttings or culms that are sold in a grocery store. Seed germination is a bit erratic and it require sowing in early spring in small pots and in a 55-65 degree temperature range.

      You would use the long leaves to make tea, sorbets or infusions for bathing. The peeled, lower stem is the portion you use for cooking.

      Here is one video: http://www.youtube.com/watch?v=0YsQXmN5voc

      Happy Gardening!
      Karen

  • Reply
    joanne
    March 27, 2014 at 8:05 am

    i live in zone 6 and would love to have lemon grass in pots on my patio..would i be able to cut them down in fall and leave them outside like i do other ornamental grasses. will they return the next year on their own?

    • Reply
      jstutzman
      March 28, 2014 at 9:04 am

      Hello Joanne. Lemon Grass would not survive the winter in zone 6. However you could bring it inside for the winter and replant it each spring. You would have to live in zone 8 for it to come back in the spring. Happy gardening!

  • Reply
    YingDonaldson
    April 19, 2014 at 12:33 pm

    Well, I planted Lemongrass last year and they were died this Winter. I am in South Carolina, Zone 7. If I moved them inside in Winter, what should I do with them? How to storage it? Please advise? Thank you!

    • Reply
      Karen
      April 25, 2014 at 7:53 am

      Lemongrass is only hardy to Zone 9, so if you are in a Zone 7 area of South Carolina you will need to bring the plant indoors in the winter. You could try growing it in a container so you can easily move it indoors as temps drop, or dig and pot up before the first frost. Lemongrass needs full sun, up to 6 hours of sun per day, and it should be fertilized every month with a general purpose, higher nitrogen fertilizer. If you grow it in a pot, use a well-drained potting mix. If you plant outdoors in the summer and it becomes too large, try taking cuttings late summer to bring inside for next year’s outdoor plantings.

      Happy Gardening,
      Karen

  • Reply
    Will
    June 1, 2014 at 8:49 am

    Hello Karen! I am wondering how long it would take lemongrass seeds to grown as we are now in June. We live in New York and have a rooftop with plenty of sunshine. If I plant seeds, how many should I plant and how long would it take to grow? If I wanted to buy a small 4” plant that is already on its way, can you point me in the right direction to a product? Thank you!!

    • Reply
      Karen
      June 5, 2014 at 9:51 am

      Will, starting the seeds indoors, use a 2-3 inch layer of seed soil, or equal parts coarse sand, peat and compost. Plant seeds approximately 1 inch apart and 1/4-inch deep. Cover the seeds with thin layer of compost or vermiculite and gently dampen the soil. Cover the seed tray with provided cover or clear plastic wrap and place in warm location, 70 to 75 degrees until sproutednot in the sun. Once sprouted, remove the plastic wrap and place in full sun until the sprouts become stable seedlings, usually in two to four weeks.

      If you want to get a head start with growing the lemongrass, we have plants available for sale here, http://www.gardenharvestsupply.com/productcart/pc/lemon-grass-herb-plant-p804.htm. Enjoy your fragrant new herb!

  • Reply
    Overhaul Your Medicine Cabniet: Medicinal Tea
    June 11, 2014 at 2:33 pm

    […] is another really easy to grow herb. You can even grow it inside (find out more here). Lemongrass has many great properties it is antibacterial, anti-fungal, anti-inflammatory, and […]

  • Reply
    Moonblue54
    June 26, 2014 at 11:05 am

    I live in coastal Alabama. I’ve been growing lemongrass for years. I bought 4 or 5 stalks at an Asian market for $1 and they’ve been the best plant investment ever! My original plant had grown huge. I thought the unusual harsh cold snap we had last year reduced had killed it. I was getting ready to throw it out, but the pot was so large and heavy I never got around to it. Glad I didn’t! It started regrowing and now the leaves are over 3 feet tall and it’s a beauty!

  • Reply
    Sulj
    July 30, 2014 at 10:18 am

    Hi,
    I stay in zone 7b and I have a patio where I would like to grow lemongrass plant. Can I cut them short and leave them out over winter? OR would it die? Can I just grow a small pot and not repot it (so if it dies in winter, I can get a new one in spring?)

    • Reply
      Karen
      July 31, 2014 at 7:22 am

      Lemongrass is only hardy to Zone 9, so you would not be able to leave it outside over the winter. It will freeze and die. If you plant it in a pot, you can bring it indoors and place it in front of a sunny, draft-free window and overwinter it, or let it die and buy a new plant in the spring.

      Happy growing~
      Karen

  • Reply
    Quid
    October 2, 2014 at 11:57 am

    Hi, I live in zone 8b. Is there any way that I can get my lemon grass to live outside during the winter? I hear that lemon grass is fine in zone 8 but I also hear that it only grows in zone 9? Its very confusing.

    • Reply
      jstutzman
      October 2, 2014 at 3:40 pm

      Hello Quid. Lemongrass is hardy down to zone 8, so with some good mulching, your plant should be just fine.

  • Reply
    Kati Olson
    April 1, 2015 at 9:45 pm

    will lemongrass grow well in West Virginia, eastern panhandle?

    • Reply
      jstutzman
      April 2, 2015 at 9:51 am

      Yes Lemongrass will grow in your area. Without knowing your zip code, we can’t determine if it would grow as an annual or as a perennial. GHS

  • Reply
    Lindsey
    June 8, 2015 at 7:11 pm

    Hi, I live in Oklahoma. I’m using the lemon grass to help with Mosquitos. How do I help it bush out more to make it prettier and how do I harvest the stalks to make lemon grass?

    • Reply
      jstutzman
      June 9, 2015 at 3:47 pm

      Lindsey, Your plant will fill out better as it gets larger. For harvesting tips, read this article. Good luck with your lemon grass plant! GHS

  • Reply
    Barb
    January 1, 2016 at 8:01 pm

    I live in central Florida and have two lemongrass plants that have gotten HUGE! Probably 15+ feet tall and happy. One I trimmed down to about 5′ and it is back and taller than ever. From what I’ve read, they typically only grow to 6′. Suggestions? I don’t want the plants taller than my house! How often can I trim back? Thanks so much!

  • Reply
    Richard Clark
    March 15, 2016 at 1:06 pm

    I have a spot that get morning to noon sun on the East side of my house, will that be a good place to plant my lemon grass or do I need to find a spot that gets more sun? My zip is 77437.

    • Reply
      jstutzman
      March 18, 2016 at 1:02 pm

      Richard, that would be a fine spot for your Lemon Grass plant. GHS

  • Reply
    RxL
    March 30, 2016 at 5:10 pm

    Hi! I am looking at planting Lemongrass in containers, more for ornamental purposes, and placing them on my front lawn patio about 10′ away from the house. My house faces north and my zip is 92563. Any suggestions and tips? When and how do I prune so that it stays somewhat neat? Thanks!

    • Reply
      jstutzman
      April 28, 2016 at 2:22 pm

      Hello RxL. Prunning can be done totally as you see fit. You will need to make sure the lemongrass plant recieves full sun in that location. Otherwise you should be ready to plant. Good luck! GHS

  • Reply
    Karen
    April 19, 2016 at 9:23 am

    Can I plant lemongrass outside in zone 5 in late April?

  • Reply
    Justgh
    April 26, 2016 at 9:57 pm

    I live in Palm Beach County, Florida (33405), and I cannot get my lemongrass plants to flourish. They are in containers and get direct eastern sunlight from around 8am until around 1pm. I water them when the soil becomes dry. Still, however, They have not grown and tend to develop dry, dead leaves.

    I would greatly appreciate any suggestions!

    Many thanks,

    GHF

    • Reply
      jstutzman
      April 28, 2016 at 2:00 pm

      GHF, since lemongrass wants full sun, it might be that the morning sun is not bright enough for them. And, they probably need some fertilizer. You might try moving them to a place where they can get six to eight hours of midday sun, generally a southern exposure. They should grow very well outside. As long as they are in a well-drained soil and draining pot, it's OK to water them more frequently. Don't let them get fully dry between waterings. Since you are in a warmer climate, it wouldn't hurt to give them some water daily during the summer months. During the summer you need to feed lemongrass weekly with a water-soluble, high-nitrogen fertilizer. The rest of the year, a monthly feeding will suffice. Also make sure they are in a large enough pot, something close to a 16-inch diameter per plant. In the winter make sure they’re in a south-facing window to receive as much light as possible. Also watch for spider mites, one of lemongrass’s only pests. If you spot them, you will notice pale specks on the leaves. Give the plant a nice bath with a dilute dish soap (not the antibacterial kind) like basic Dawn, and a good blast with the hose.

      I hope this helps and that you get a great crop of lemongrass.

      Karen
      Master Gardener
      Garden Harvest Supply

  • Reply
    Cory olson
    August 14, 2016 at 7:10 pm

    I live in North Dakota, depending on the year winters can be harsh. Can lemongrass make it? I would hate to have to dig it up and bring it in every year

    • Reply
      jstutzman
      September 1, 2016 at 5:42 pm

      Cory, lemongrass will not survive your winters in North Dakota. You will either have to dig them up or start with fresh plants in the spring. Happy gardening!

  • Reply
    Ceejay
    August 16, 2016 at 5:57 pm

    Hi!
    I live in New Orleans (zone 9?) and have a lemongrass plant growing in my backyard. It was planted last July and is now 5-6ft tall. I do absolutely nothing to it. It gets sun from the east and south, and is shaded from the western sun exposure. I ripped out my lawn a few years ago, and the plants I planted are suffering in the intense heat we have this summer. Since the lemongrass is doing so well in the backyard I would like to dig up my current plants and grow lemon grass. If I do that, the lemongrass would be in FULL burning hot sun all day, with no shade at all. I’ve read that they love full sun, but would that be too much? Physical and financial limitations would make this an ideal plant for that area. I LOVE it and would plant it everywhere if I could! I also read that it repels snakes, and i believe it because there are snakes in the woods nearby but I have never seen one in the area of my yard where my lemongrass is growing. Thanks in advance!!

    • Reply
      jstutzman
      September 1, 2016 at 5:41 pm

      Ceejay, congrats on your growing lemongrass plants! You have read correctly, lemongrass loves the heat. You just don’t want them to dry out, so make sure they have a source of moisture. Here is more reading info on growing these plants; growing lemongrass in the south.

  • Reply
    Ida
    August 29, 2016 at 6:01 am

    I have two lemongrass plants and would like to plant them in the ground. They are growing fine on the patio and winter is coming. We live in Minnesota south of the Twin Cities and 55122 zip. can I plant them and maybe trim them down some?

    • Reply
      jstutzman
      September 1, 2016 at 5:37 pm

      Ida, lemongrass will not survive outside in your area. You will have to bring them inside or start with new plants in the spring.

  • Reply
    Susan
    November 16, 2016 at 4:59 pm

    I bought a 4″ pot of a clump of lemongrass. Seems like there are about 50 tiny 8″ seedlings (?) in this clump. Is this correct? Should I separate them? Leave them? I’m growing them indoors for now (zone 5). Thanks.

    • Reply
      jstutzman
      November 17, 2016 at 3:18 pm

      Susan, that sounds about right, and no you do not need to separate the plant. However, you certainly are able to do so without harming it. Good luck, Joe

  • Reply
    Joni
    April 18, 2017 at 4:58 pm

    I live in Yuma,Arizona. Could I plant Lemon Grass on South side of my house? How would it do during the hot summer?

  • Reply
    Carol
    April 19, 2017 at 12:47 pm

    My lemongrass plants were inside for the winter in Zone 6B. They are dried and brown even though I watered them. Will they come back or should I throw them in the trash?

    • Reply
      jstutzman
      August 10, 2017 at 8:00 am

      Carol, they should be thrown away.

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