• 69 Comments

This symptom checker will help you to quickly identify marijuana plant problems and easily diagnose sick marijuana plants!

Learn more about nutrients, diseases, stresses, pests, and bugs. Click on any picture for detailed information about a particular marijuana problem, deficiency or symptom and find out what’s wrong with your plant.

Nutrient Problems

boron deficiencies in cannabis plantsBoron deficiency

copper deficiencies in cannabis plantsCopper deficiency

calcium deficiencies in cannabis plantsCalcium deficiency

iron deficiencies in cannabis plantsIron deficiency

magnesium deficiencies in cannabis plantsMagnesium deficiency

manganese deficiencies in cannabis plantsManganese deficiency

molybdenum deficiencies in cannabis plantsMolybdenum deficiency

nitrogen deficiencies in cannabis plantsNitrogen deficiency

phosphorus deficiencies in cannabis plants

Phosphorus deficiency

potassium deficiencies in cannabis plantsPotassium deficiency

sulfur deficiencies in cannabis plantsSulfur deficiency

zinc deficiencies in cannabis plants 

Zinc deficiency

pH fluctuations in cannabis

pH Fluctuations

nutrient burn in cannabis

Nutrient burn

 

Diseases

algae on cannabisAlgae

bud rot on cannabisBud rot

leaf septoria on cannabisLeaf septoria

powdery mildew on cannabis plantsPowdery mildew

fusarium on cannabisFusarium

verticillium wilt on cannabisVerticillium wilt

root rot on cannabisRoot rot

damping off on cannabisDamping off

 

Pests

ants on cannabis plantsAnts

aphids on cannabis plants

Aphids

caterpillars on cannabis plantsCaterpillars

cutworms on cannabis plantsCutworms

crickets and grasshoppers on cannabis plantsCrickets and grasshoppers

birds on cannabis plantsBirds

cats and dogs on cannabis plantsCats and dogs

deer on cannabis plantsDeer

gophers and moles on canabis plantsGophers and moles

rats and mice on cannabis plantsRats and mice

fungus gnats on cannabis plantsFungus gnats

leaf miners on cannabisLeaf miners

snails and slugs on cannabis plantsSnails and slugs

spider mites on cannabis plants

Spider mites

thrips on cannabis plants

Thrips

whiteflies on cannabis plants

Whiteflies

Stresses

cannabis heath stressHeat stress

humidity and temperature in your cannabis grow roomHumidity and temperature

pruning marijuana plantsPruning cannabis

airy and loose marijuana budsAiry and loose buds

marijuana clones won’t rootClones won’t root

stretching marijuana plantsStretching plants

hermaphrodite marijuana plantsHermaphrodites

cannabis seeds won’t germinateSeeds won’t germinate

dark cycle interruptions cannabis plantsPlants won’t Flower

marijuana plant knocked downKnocked down plant

hard or soft water for cannabis plantsHard or soft water

cannabis and weatherWeather

overwatering and underwatering marijuana plantsOver- and underwatering

marijuana soil problemsSoil problems

Our Plant Protector Sets will help you prevent a lot of these issues. Read comments from these happy customers and see for yourself!

The founder of I Love Growing Marijuana, Robert Bergman, is a marijuana growing expert that enjoys sharing his knowledge with the world. He combines years of experience, ranging from small-scale grows to massive operations, with a passion for growing. His articles include tutorials on growing... [read more]

68 Comments

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  1. By Rich

    ,05 Jun 2015
    Hi.My seedlings have brite yellow spots on them.I did not see any like this in your examples.Can you please tell me what you think I might be going on?Thank you very much.
  2. By steve

    ,06 Jun 2015
    Best marijuana plant problems chart to date !!!!!
  3. By Rob

    ,06 Jun 2015
    I had to move plants out of grow box and put it back about an hour.
  4. By John Cox

    ,09 Jun 2015
    Thanks for the advice it will come in handy .I have done copied it down .Thank you again Robert .
  5. By lee stanton

    ,11 Jun 2015
    what is nutrient burn and how can i stop it.
    1. By dickie fickl e

      ,12 Aug 2015
      dont add too much nutes ,, if you do flush with three times as much water as media
  6. By TxGrowman

    ,11 Jun 2015
    This article works equally well for my tomatoes and other veggies! Used it during my winter grow to prevent infestation in my ladies, my WW and AK-47 came out good! Considering the trials and tribulations I put them through, your […]Read More
  7. By jo

    ,11 Jun 2015
    what is nutrient burn and how can i stop it.
  8. By latewood

    ,11 Jun 2015
    Rich. Best way for you to get answers is to join the forum, and fill out a support ticket, copy/paste that into your own support topic, and add a couple pivtures. We will be glad to look in and advise […]Read More
  9. By latewood

    ,11 Jun 2015
    Lee and Jo, I advise you all to download and read our free grow bible. Nutrinet burn is when the solution or soil mix is too hot fore the roots, and burns the plant down.
  10. By jo

    ,12 Jun 2015
    thanks latewood. but what can we do to stop it ?,
  11. By latewood

    ,15 Jun 2015
    You should always flush your plants if you are sure it is Nutrient toxidity, (nute nurn). I advise you all to join the support forum. This will get you faster response to your questions; Especially in an emergency! In order […]Read More
  12. By Jordan

    ,17 Jun 2015
    Such an in depth look at the problems plants can get! This is a great guide for people starting out growing their own. Thanks for sharing!
  13. By Abo Adam

    ,30 Jun 2015
    My one month old plant suddenly has white dots on the leaves, I've recently added Epsom salt to my bubbleponics, because of magnesium diffeciency
    1. By latewood

      ,02 Sep 2015
      White dots generally indicate spider mites or aphids; Or; If you spray the plants with water...This can cause spots. We always invite growers to join our support forum for a more in depth support system
  14. By snickerdoodle

    ,25 Jul 2015
    Love the article, is the main top picture of a grow room in bloom considered normal? I see several yellow/brown curling fan leaves. Thanks
  15. By Increase Your Marijuana Yield – 5 Tips

    ,27 Jul 2015
    […] plants have sudden leaf discoloration, curling of the leaves, death of the leaves or other strange symptoms, the cause could easily be from too little (or too much) of one nutrient. There is the common […]
  16. By How to Increase Your Marijuana Yield | Daily Dank Deals

    ,09 Aug 2015
    […] plants have sudden leaf discoloration, curling of the leaves, death of the leaves or other strange symptoms, the cause could easily be from too little (or too much) of one nutrient. There is the common […]
  17. By mowerman

    ,29 Aug 2015
    i am on my first grow mw babys are 11 days old and the leaves on a couple of them are getting leaf curl and look a litte deformed im using hps 1000 mh bulbs that are aprox 18 -20 […]Read More
    1. By mowerman

      ,29 Aug 2015
      i asked about my plants so i can learn about some of the problems and learn to fix them before i put my very expensive seeds in the pots so ive got everything as close as i can ahead of […]Read More
    2. By latewood

      ,02 Sep 2015
      mowerman, 2 immediate serious issues come to mind. 1. 1000 watt lamps are too powerful for seedlings. They can be used by expert growers at a safe distance. 32-36". Maybe higher for seedlings. Temps, and humidity play a factor. 2. […]Read More
  18. By vern

    ,30 Aug 2015
    Hello to all growers and future growers, just one comment and one question: The price for your seeds is NOT as important as customer satisfaction and support from a company that stands by there product and guarantees your shipment like […]Read More
  19. By latewood

    ,02 Sep 2015
    No. Sorry brother, but you cannot flower and veg in the same room. I also believe I answered this question on another page. You never want to keep plants awake for 24 hours. 16018 hours of light is best for […]Read More
  20. By bryce

    ,05 Oct 2015
    you have this huge picture for the link and at the top of the page showing all these problems with answers except for the one that is at the top!!!!! Im super interested in what caused that!!!!!!
  21. By Marijuana Seedling Problems

    ,06 Oct 2015
    […] Symptoms of underwatering include wilting, improper growth, and a lack of moisture in the soil. Although it happens less often than overwatering, it is still a serious problem that could negatively impact your seedling. It happens especially with beginners […]Read More
  22. By Albert420

    ,07 Oct 2015
    I saw this recently on one of my plants, the tips of the leaves looks like they are dying, why is this? How can I prevent this from spreading? The plant is outdoors. https://www.dropbox.com/s/qtk9us3ny1tzo08/IMG-20151007-WA0000.jpg?dl=0 Many thanks
  23. By latewoodl

    ,10 Oct 2015
    Albert420 Looks like your nutrients or fertilizer is too hot. This can also be caused by PH being off. I suggest you join our Support Forum, and fill out a "Support Ticket".
  24. By Mammels And Rodents Damaging Your Marijuana Plants?

    ,12 Nov 2015
    […] as it wants to get more sun exposure throughout its life to perform photosynthesis. Check this Marijuana symptom checker and see what kind of pest or disease is affecting your marijuana […]
  25. By Panos

    ,27 May 2016
    Hey everyone. Awesome symptom checker btw. Unfortunately I cant find anywhere what is wrong w my plant. I have 2 Northern light trees, same everything, simple potting soil and no food added yet. So one of them suddenly has black […]Read More
  26. By latewood.ILGM

    ,12 Jun 2016
    panos, I advise you to join our support forum. We have many knowledgeable members and experts always willing to help. :)
  27. By bojax

    ,03 Jul 2016
    I have 4 week old plants of various types growing indoors under a solar storm 440. They sprouted fine, grew to about one inch and a half and then quit growing. They are still alive putting on new leaves but […]Read More
  28. By Niraj Thakur

    ,29 Sep 2016
    Please help me out.. I had grown 13 plants in a space of nearly 200 cm2 by planting them in last week of August where they were good and GREEN. Till September 20 they were flourishing well but one day […]Read More
    1. By Roy ILGM

      ,30 Sep 2016
      Hi Niraj, I'll have one of our expert growers look at your question but if you want to put up more information, the best place to go is our grow support forum :D
    2. By Kevin

      ,27 Feb 2017
      Sounds like it could be fungus gnat larvae. I had 3 of 7 ww die because of these little bastards. The larvae eat fungus and other like material in the pot and when all gone, they start to work on […]Read More
  29. By latewood.ILGM

    ,30 Sep 2016
    Niraj, You can join our forum at www;ilovegrowingmarijuana.com Here after making some posts and a little reading time you can post images of your grow. I am sorry to hear about this serious issue but, we can help you out […]Read More
  30. By BikerBud

    ,18 Feb 2017
    my leave's have yellow spots on the veins what causes this?
    1. By latewood_ILGM

      ,20 Feb 2017
      HUe Bud, It is very hard to identify leaf issues without a picture. I usffect you study the pictures in this article and determine what issue you have. Another option is to join our support forum, and we can help […]Read More
  31. By rip

    ,20 Feb 2017
    hey my plants are like 4 weeks into flower and about 3 weeks ago i transplanted from pot to ground and on the 4th week they are starting to yellow any help tips on what the problem could be
    1. By latewood_ILGM

      ,20 Feb 2017
      rip, Again; It is hard to say without pictures. Repotting and replanting outdoors after you start the flower period is not recommended. Thewy could be getting too wet, or not have enough nutrients available to them. Best if you join […]Read More
  32. By nick

    ,28 Apr 2017
    hi! one question..!i saw some brown lines on some leaves one have a little very small hole make....as i see maybe its a magnesium deficieny just sprayed with calcium/magniseum/natrum solution.last feding was a bit light because i think i overfed […]Read More
    1. By Roy ILGM

      ,01 May 2017
      Hi Nick, I advise you to hop onto the support forum and put up a picture of your plant. Our experts there can help you identify the problem and its solution. – I❤️GM
  33. By grmd420

    ,08 Feb 2018
    How you ever come across lack of dankness? Grew 4 different strains together from 3 different seed breeders. All 4 had very little smell if any. Literally zero dank, just a very mild citrus in 1 and a mild vanilla(ish) […]Read More
  34. By Nick

    ,14 Mar 2018
    Hi , hello , my plants all have yellowy browny big leaves. Can I send you a photo of them ? They are autos growing outside in Southern Hemisphere
    1. By Stacy ILGM

      ,15 Mar 2018
      You can post pictures on our support forum, our expert growers can take a look there and help you out! https://support.ilovegrowingmarijuana.com/
  35. By chuck

    ,30 Oct 2018
    I have tried to send pictures and they don't go to you chuck
  36. By Barry

    ,20 Apr 2019
    I consiider myself a pretty good grower, but just ran into an interesting situation. I planted 7 Purple skunk seeds, 6 of them came up. However, one sprouted 2 plants from 1 seed, almost like siamese twins. Ever seen this?
  37. By Glenn

    ,05 May 2019
    My plants look beautiful but the leaves are really small. I'm in 3rd week of flower and the heads are there and the are looking like normal but the leaves are really small
  38. By Bobby

    ,30 May 2019
    Hi, ive been growing weed outside for about a month now and everything has been fine up until now. I see darkening on The edges of the leaves and tiny orange spots and Throughout. Please email me back so i […]Read More
  39. By Rick

    ,18 Jun 2019
    My 15 seeds didn't Hatch and I put my Faith by sending you 159.00 that I was getting quality seeds because I love growing Marijuana too I wake up to sit next to my little green dudes now it's like […]Read More
  40. By Steve

    ,23 Jun 2019
    Started noticing small brown spots on a number of leaves on my plants. Just the spots, no yellowing. What's going on?
  41. By ESTin76

    ,28 Jun 2019
    Please I need help. I'm on Week 7 Flowering and I'm fighting this brown mold on lower part of stem. Haven't went to find anything for it. I've been blasting fan on it and a 100 watts seperate light with […]Read More
  42. By Bris

    ,02 Jul 2019
    So.... I had 2 plants I put then outside and my dog got ahold of the pots and ran around with them I thought they were dead but I found one of them looking pretty ok... suffering bug bites small […]Read More
  43. By Marc

    ,10 Jul 2019
    Got some agea on my medium from water level too High Will it hirr plant Snowman
  44. By Brad

    ,10 Jul 2019
    Is boreworms the end of my crop?
  45. By John

    ,10 Jul 2019
    Help! One plant started forming buds, the buds seemed to open up and blow white powder everywhere. What did I do wrong?
  46. By latewood ILGM

    ,26 Jul 2019
    Steve, You need to join our forum where we can address you issue and share info. support.ilovegrowingmarijuana.com
  47. By latewood ILGM

    ,26 Jul 2019
    ESTin76, Please go here support.ilovegrowingmarijuana.com where you can establish an account and we can help you with your issues. We are not set up to do grow support here in the blog. Thanks :)
  48. By latewood ILGM

    ,26 Jul 2019
    Re-pot the plant and nurture it. Go here for more help. support.ilovegrowingmarijuana.com
  49. By latewood ILGM

    ,26 Jul 2019
    Bris, Post above is meant to you. sorry
  50. By latewood ILGM

    ,26 Jul 2019
    Marc, Not sure what you mean... go here: support.ilovegrowingmarijuana.com and you might be able to search for info, or have members abd staff help you out.
  51. By latewood ILGM

    ,26 Jul 2019
    Brad and John, You both should go here, establish an account and allow our staff and members to help you. Peace, lw support.ilovegrowingmarijuana.com
  52. By David

    ,16 Aug 2019
    I'm growing a single Grandpa Larry plant , 17 days into flowering the small leaves on the flowers starting to form on the upper shoots are beginning to curl like a claw not the large Sun leaves.. I flushed the […]Read More

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