Amorphophallus konjac - 9 Care Tips for Voodoo Lily

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Amorphophallus konjac, a species of plant commonly known as voodoo lily, is a bizarre, easy to grow oddity that is sure spark a lot of conversation. From the unusual growth habit, to the inflorescence that smells like rotten meat, this post will teach you all about this unusual plant, as well as how to care for it. And it is easy to care for, whether you plant it in the ground (it is hardier than you'd think) or as a potted plant.

amorphophallus-konjac-care

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SOME INTERESTING AMORPHOPHALLUS KONJAC FACTS

Sometimes known as Amorphophallus rivierei, the accepted name for this plant is Amorphophallus konjac.

This tuberous plant is native to China and grows in wet, tropical ecosystems.

It is widely cultivated in both Japan and China for its edible tuber. Although the corm is edible, it can not be eaten raw because of the calcium oxalate crystals that are present which would sting your tongue and throat, and probably why the plant also earns the name Devil's Tongue.

The calcium oxalate is broken down by either cooking the tuber, or drying it.

The tubers are commonly used to make into flour, jelly, cake, noodles, and more.

Other common names for the plant include Voodoo Lily, Konjaku, Konnyaku Potato, Snake Palm, and Elephant Yam.

Amorphophallus konjac is a similar species to the Corpse Plant (Amorphophallus titanum), except that konjac is much smaller, easier to grow and flower, and produces an inflorescence that is far less stinky.

GROWTH HABIT & LIFE CYCLE

This plant grows from a tuber, and as new leaves grow, the tuber will shrink in size. As the growing seasons continues, a new tuber will start to grow and take the place of the old one.

The stalk is actually the petiole, and has a beautiful mottled pattern. The leaf is actually huge and composed of numerous leaflets.

amorphophallus-konjac-petiole
The mottled petiole of Amorphophallus konjac

At the end of the growing season, the plant will go dormant (see the Dormancy section near the end of this post), and the plant will lose all of its foliage.

After the dormancy period, if the plant is mature enough, it will flower. The inflorescence smells like a dead animal, and this scent serves to attract its pollinators. After flowering occurs, it will start to grow a new leaf and start the cycle all over again.

These plants are hardy down to about zone 6, and I can attest to this from a friend that has grown this plant in Ohio. It comes back every year. The leaves are not tolerant of frost, but the corm should be hardy down to zone 6 as long as you avoid clay soils which will spell death for this plant in cold-winter regions.

amorphophallus-konjac-ohio
An Amorphophallus konjac growing in Ohio and comes back yearly.

AMORPHOPHALLUS KONJAC CARE

LIGHT

If you are growing this plant indoors, a good location would be either an eastern or western facing window, or even your sunniest window (south exposure if you're in the northern hemisphere, or north exposure if you're in the southern hemisphere), especially in the winter time.

If you choose to grow these in the ground (they are hardy down to zone 6 or so), place them in part sun and try and avoid any locations with hot, mid-day sun. A half day of sun should work well, or dappled sun throughout the day.

WATERING

These are definitely moisture loving plants and appreciate being kept consistently moist while in active growth. Mine is in a pot and I water when the surface of the potting mix feels dry to the touch.

It can even tolerate standing in water while actively growing. In the Fall, when the plant starts to go dormant on its own (see the dormancy section later on in this post), you should stop watering.

FERTILIZER

This plant is a heavy feeder, so be sure to feed throughout the growing season, but halt fertilization when dormancy starts and the foliage starts to yellow and die off.

The International Aroid Society recommends a fertilizer that is high in phosphate in order to stimulate healthy tuber growth.

TEMPERATURE

These plants like to stay warm, so try and keep them at a minimum of 60°F (16°C), but prefers warmer temperatures over 70°F (21°C) during the day and at least 66°F (19°C) during the night, with a range of 20-25°C (68-77°F) being an ideal growing range according to the International Aroid Society.

HUMIDITY

This plant does appreciate higher humidity, so aim to keep it at least at 60%, but it should tolerate lower as long as you keep the plant well watered.

POTTING MIX AND SOIL

Amorphophallus loves a potting mix or soil that is well-drained, fertile and moist. If you plant them in the ground, they will not tolerate heavy clay soils, especially if you live in an area where they are marginally hardy because they can rot in cold, wet winters.

In a pot, it's much easier to control the potting mix. I have mine planted in an all-purpose potting mix to which I've added some perlite.

PROPAGATION

Amorphophallus konjac readily produces offsets and new tubers. It is recommended to wait until Spring time to separate any small tubers.

amorphophallus-konjac-tuber-corm

An unusual thing about Amorphophallus is that the roots grow from the top of the tuber, so the top of the tuber must be placed deep enough under the soil surface.

If planting in a pot, choose a pot that is at least twice the diameter of the widest part of the Amorphophallus tuber.

As far as planting depth of the tuber, plant it so that it is at least twice as deep as the tuber is high. So if your tuber is about 2 inches high, plant the tuber so that it's about 4 inches deep (from the top of the tuber to the top of the soil line).

DORMANCY

Dormancy will start on its own. In fact, for my own plant, within a matter of days, the foliage started to yellow and collapse. Mine started to do this about a month into the Autumn.

My Amorphophallus konjac going dormant

Wait until the leaves are fully browned before removing them. You can see one more leaf in the photo above, and it's still somewhat green. Leave the foliage until it has turned brown before removing it.

Once your plant starts to go dormant, stop watering your plant completely.

During dormancy, either leave the tuber in its pot, or you can take it out and store it in dry peat moss. If you want to propagate, wait until the Spring time before separating any tubers.

As far as storage during dormancy, store your tubers in a cool, dark location that is around 40-50°F (approximately 5-10°C).

If you've kept your tubers in its original pot, wait until you see signs of new growth poking out of the potting mix before starting to water again. At this time, be sure to place your plant back in appropriate lighting.

If you've dug the tubers up and stored them in peat moss, inspect the periodically until you start to new new, pinkish growth coming from the top of the tuber. Then plant them as directed in the Propagation section of this post.

FLOWERING

After the dormancy period, if your plant is mature, it will flower. If it still isn't mature, it will start growing new foliage instead. Typically, your plant will flower when it is 3-4 years old, and the inflorescence is a gorgeous burgundy color.

amorphophallus-konjac-flower

Flowering will typically occur in late Spring to early Summer, and the inflorescence will be 3-4 feet tall.

But beware! The inflorescence smells like rotting flesh, and this is intended to attract carrion flies, its natural pollinators. So be careful where you have the plant when it is bloom!

When the inflorescence is ready to be pollinated, the foul stench starts, and this attracts its pollinators. Once the pollination has occured, the odor disappears.

The inflorescence has the typical aroid structure consisting of a spadix (the spike in the middle that contains numerous, tiny, male and female flowers), and the surrounding spathe (the maroon sheath).

The interesting part is that the plant will actually heat up the spadix once the pollen is ready for fertilization, and this helps to increase the foul odor which is released by the plant in order to attract pollinating insects.

amorphophallus-konjac-smelly-flower
The Amorphorphophallus konjac inflorescence.

After blooming, the plant will start to throw out foliage growth, which can reach up to 4-5 feet tall under good conditions.

Do you have an Amorphophallus konjac? Comment below. I'd love to hear!

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29 Comments

  1. Hello! Thank you for the excellent article! It clarified many things for me. I live in Córdoba, Argentina. A friend gave me two Amorphophallus konjac bulbs about six years ago, and just this spring (September 2025) one of them is flowering for the first time in a pot.

    One of my questions is whether, after the flower, the plant that used to sprout every year will still grow, or if this year it will only produce the flower. My other question is whether it will bloom every year from now on, because I had understood that it only flowers once every 8–10 years.

    Many thanks!
    Gerardo

    1. Glad you enjoyed the article! After flowering occurs, the inflorescence will die, and there is a period of dormancy (a month or so, but can it depend), and then you should start seeing a leaf start to grow. For the species that blooms every 8-10 years, you're probably thinking of another species, Amorphophallus titanum. For konjac, it will bloom more often, but probably not yearly, and the frequency can depend a lot on how hot it is where you're growing it. Hope this helps!

  2. My plant bloomed 2-years ago, followed by a tall stalk. It bloomed again this year followed by the leaf-stalk (?). The stalk died back, but was followed by several small stalks. Perhaps 7 different plants? What is happening? It is in a pot.

  3. As the bulb matures it forms a dimple on the top of the bulb that collects water. I realized after finding rotting bulbs in the ground why. I read an article that the dimple that forms on on top of mature bulbs collects water and freezes in the winter. This will make the bulb rot. If you plant your bulbs on their sides, no more rotting bulbs! Also, it states the top of the bulb should be 4 to 6 inches deep. Also, if you have a good amount of bulb left, cut off the rotting part, brush wound with fungicide powder (Rootone F). Let scab form on wound for a few days and your bulb will be ready to plant again!

  4. I want to buy these plants. Now i am in Canada and they can be sent dormant or do you know of a Canadian outlet. I have three different kinds of them and i love them. Gerald Brickman.

    1. Hi Gerald! I'm not certain of who sells them in Canada. I'm sure if you did a search online, you can find it for sale somewhere. Good luck!

  5. Hello!
    Thanks for this Information, I got the bulb in fall 2022 as a birthday gift. I planted it in a container and Overwintered in a cool basement and put it out during the summer 2023 where it grew beautifully, Dying back in the fall. I am happy to report it is putting out a flowering stock here in Boston in April 2024 inside our south facing plant room. Curious, when i s the best time to repot the plant. I attached a photo if that were possible.
    Cheers,
    R.

  6. Hi! I got one of these last year and it did well, died back during the autumn, and I kept the tuber in the pot and left it alone while I waited for it to sprout again this year. It's now autumn already and it didn't come out of dormancy. Anything I did wrong or can do to get it to sprout next year? Is it dead...? I haven't watered it and left it by a growlight before moving it to the windowsill in the early summer, but there didn't seem to be any signs of growth.

    1. Sorry to hear that! It may have either dehydrated, or even rotted. It's hard to say without some more details of your conditions. Did you do anything differently from what I described in my post?

  7. Hello all,
    Need some advice. I've got an Amorph. Konjac ...well, I might have if it doesn't die on me. The past two years have been pretty rough on it. I thought I had a very satisfactory soil mix - very well draining with a little mulch and humus mixed in. It has bloomed for me the past several years. It went from practically a volleyball sized corm to a softball sized corm these past two years. I've saved it from rot twice because our weather. It will rain daily for a solid week - which I'm sure is partially to blame for the rot. I have it growing in a pot to make it easier to remove for winter "storage". Last week we encountered a strait line wind and hail. It didn't damage the canopy that much, but it snapped the trunk at soil level. It was still partially attached so I left it alone to see what would happen. Well, the area where it snapped became mushy to the touch (slick as snot). Then I saw that it had severed completely from the corm. So I pulled the corm out of the pot and saw that several spots on it had rot. I've taken a hose and a soft toothbrush and cleaned the areas of rot. Now I'm letting it dry out. The top of the corm has new growth ready for next year. Typically when the cold weather sets in, the foliage starts to die back and the corm starts taking back nutrients from the leaves and trunk as it withers. That's not going to happen this go round. So do I just dust it with some sulfur powder (keep it from any further rot) and store it for next year? Can I keep it from blooming and expending its remaining energy this winter? Is there a better soil mix I could use that will ensure it from rotting no matter how much it rains during the growing season? Any advice would be appreciated!!

    1. Hi James! Sorry about all the trouble with your plant! I can share your frustration about nonstop rain. I think your comments were spot on. It likely won't bloom at this point, so I wouldn't worry too much about that as far as wasting energy...I think it will probably just grow foliage and not bloom next year, until it gains enough energy again. You may want to store it at this point like you mentioned. However, I would maybe start it back up to grow a little earlier than normal since the corms are much smaller now...As far as potting mix, you may want to add a bunch of pumice. This will increase the drainage and the soil should dry out more (and also introduce more air and help to minimize "overwatering" and rot). I hope this helps a bit!

    2. @James, Take the bulb out and look at it. Don't be afraid to handle the bulbs, their pretty tough. I left comments about rotting bulbs. Clean off the rotten part, brush fungicide powder on the open wounds, let scab over a few days and replant 4 to 6 Inches deep from the top of the bulb. Mature bulbs form a deep dimple on the top of the bulb. PLANT THEM ON THEIR SIDES SO THEY DON'T COLLECT WATER AND FREEZE OVER THE WINTER. If you still have problems with rot, your location may be too wet.

    3. @James, Clean your bulbs, put your bulbs in a paper sac, in the garage, in a dark place, worry about it next spring. I'm in tulsa,ok. Mine are planted outside, very late to break dormancy (early summer, about crept myrtle time). Large one is already started to die back (late summer) Depends on how hot the summer is. Can't take 100 deg temps for very long. Once you get these growing, they mutiply fast, you will have so many bulbs you will be throwing them away.

  8. I'm late to the party but found this post on a google search. I planted some
    mystery corms and they appear to be konjac. I appreciate your photos and info... I can't wait to see mine grow!

  9. Oh hello, I love these plants, I had several but unfortunately had to give them away. I can now replace them if you could tell me where I can finally start over again. I do know it takes awhile to grow but so worth the wait. Hope I can get some information. Thanks have a great day and be safe.

    1. Hi Judy! I received mine from a friend that sent it to me in the mail, but I would just do a quick google search and I'm sure you can mail order one very easily.

  10. I bought my first baby bulb ( size of a nickel ) in 2017 from a farmers market. From that one bulb, I currently have 44 potted up in separate pots. Last fall I collect around 300 babies from the 44 adults. My first one bloomed every late winter for the past 3 years and is the size of a soccer ball. I've given away dozens of babies since I started . I will say fertilizing every 2 weeks with a liquid tomato fertilizer has really made a huge difference. The plants get like 5 feet tall and the bloom a few months ago was 7 feet tall. This plant is crazy and awesome. I love it!! Upstate NY here, so the bulbs get stored in my basement in November and I just potted them up outside today. May 14.

  11. Heller. I bought my Konjac three years ago off Ebay and it is now beginning to flower. It grows in a 21cm pot and last year produced 15 tiny bulbs. We live in the north of Sweden, so I hope it gets warm enough outside so I can put it out before it starts to smell. I am very excited to see it flower.
    Happy growing,
    Peter.

  12. Hey,
    Amazing article and read! Thanks for the info.
    I'm in the UK and growing it in a pot. Finally mine is putting out a flower.
    Do you know how long they normally take to grow and develop before they open?
    Thanks.

    1. Glad you enjoyed the post Alex! It can vary a lot depending on your conditions. Mine is still dormant and I need to check on it and notice how long it takes for me. Sorry I couldn't provide a more concrete answer!

  13. Hello & Happy Tuesday!
    I have a 20 year old konjac that's currently in a pot, however it hasn't always been. I was searching for why it might be sending up two tubers when I found your site. I picked your site because I was born and raised in Cincinnati, Ohio and moved away in 2008. I purchased my Momma Voodo bulb at the time smaller than my fist, from the Krohn Conservatory during a butterfly show in 2004. She grew and populated two different yards (6" deep in good soil, surviving winters) in Cincinnati. I then moved to D.C. for three years where she stayed potted but next to a huge west facing window. In Nashville, she was in the ground for 3 years and potted for 3 years. In the ground she grew huge with over a four foot spread and 8" bulb. She shrank to about 6" whilst in a pot. Now, Here in Albuquerque, New Mexico she's been in a 2' pot for the past 5 years. She really can't be in direct sunlight at all here, the sun is insane, so she usually breaks ground indoors (like she is now with two tubers and 4 kids) and then I put her underneath a big tree with daily watering when it's warm enough. She's bloomed several times, once in Nashville and once here in ABQ two years ago. She bloomed indoors two years ago... wow was that hard to handle! Thankfully it was getting warm outside so I was able to take her out when she got really putrid. They're really beautiful plants & this girl will continue to go with me if I ever move away from here. But anyway sorry for the story but I thought you'd find it fun. Now my question is, you may have guessed, do you have any ideas why now, at 20 years old she decided to grow two tubers which are neither flowers but both leaf? There hasn't been any tubers growing that close to Momma (within a 6-8" radius) ever before so I don't believe it to be a child. Whilst googling I have seen pictures of a konjac with two tubers, but with one a leaf and one a flower. Any ideas? Thank you very much in advance, may your day be awesome!
    Namaste,
    Sean

    1. Hi Sean! I love that story! Thanks for sharing! I'm actually not sure of the answer to your question. But when I received my plant, it was sent to me by one of my readers and it did have multiple tubers in a cluster all together. It sounds like you're doing a great job with your plant so just keep doing what you're doing 🙂

    2. @Sean Murphy, I am in Tulsa,Ok. I have been growing these tubers for many years now. I have konjac, leo's song and night stick. Mine do what ever they want. Last year I had 3 huge plants. This year I have one konjac that is 5' tall with 4 new shoots around it, the rest are 4 to 5 3' shoots around the bulbs. One of these posts mentioned fertilizing these bulbs for larger plants. I have these growing everywhere, they are very cool plants but once you get them growing they become almost invasive. You will be giving bulbs away.

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