Symptom Checker - Identify Marijuana Plant Problems

71 Comments

Robert Bergman

Symptom Checker – Identify Marijuana Plant Problems

In this article we will discuss:

Nutrient problems
Diseases
Pests and bugs
Environmental stresses

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.

Boron deficiency

copper deficiencies in cannabis plants Copper deficiency

Calcium deficiency

Iron deficiency

Magnesium deficiency

Manganese deficiency

Molybdenum deficiency

Nitrogen deficiency

Phosphorus deficiency

Potassium deficiency

Sulfur deficiency

Zinc deficiency

pH Fluctuations

Verticillium wilt

Crickets and grasshoppers

Gophers and moles

Snails and slugs

Humidity and temperature

Pruning cannabis

Airy and loose buds

Clones won’t root

Stretching plants

Seeds won’t germinate

Plants won’t Flower

Knocked down plant

Hard or soft water

Over- and underwatering

49 Comments

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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.

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. Less Content

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By dickie fickl e
,12 Aug 2015

overwatering ! for sure

overwatering ! for sure Less Content

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By steve
,06 Jun 2015

Best marijuana plant problems chart to date !!!!!

Best marijuana plant problems chart to date !!!!! Less Content

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By Rob
,06 Jun 2015

I had to move plants out of grow box and put it back about an hour.

I had to move plants out of grow box and put it back about an hour. Less Content

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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 .

Thanks for the advice it will come in handy .I have done copied it down .Thank you again Robert . Less Content

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By lee stanton
,11 Jun 2015

what is nutrient burn and how can i stop it.

what is nutrient burn and how can i stop it. Less Content

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By dickie fickl e
,12 Aug 2015

dont add too much nutes ,, if you do flush with three times as much water as media

dont add too much nutes ,, if you do flush with three times as much water as media Less Content

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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

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 seeds produced plants that managed an exceptional harvest. Thanks Robert for all you and your staff do for us growers! Less Content

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By jo
,11 Jun 2015

what is nutrient burn and how can i stop it.

what is nutrient burn and how can i stop it. Less Content

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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

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 you. :) Less Content

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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.

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. Less Content

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By jo
,12 Jun 2015

thanks latewood. but what can we do to stop it ?,

thanks latewood. but what can we do to stop it ?, Less Content

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By Allen W
,12 Jun 2015

Back off nutes

Back off nutes Less Content

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By Allen W
,12 Jun 2015

flush plant

flush plant Less Content

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By jo
,12 Jun 2015

thanks allen. stopped feeding.

thanks allen. stopped feeding. Less Content

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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

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 to not cause a "toxic" event in your grow; Make sure to supply yourself with the proper PH, and EC/TDS meters in order to control the grow environment of you plant. Less Content

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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!

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! Less Content

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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

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 Less Content

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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

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 Less Content

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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

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 Less Content

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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 […]

[…] 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 […] Less Content

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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 […]

[…] 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 […] Less Content

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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

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 inches over plants and they are set on the lowest setting im watering once to twice a day in coco and perlite vermiculite at 25 p 25 v and 50 coco im using gh flora grow and gh micro at 1/4 tsp per gallon so can anyone tellme if im over nuting or over watering tips very end of tips are turning brown on a few leaves but not all oh they are bag seeds so may not all be the same they seem very heaalthy other than the few leaves that are deforming tuning round at ends and they have a grey look on the undersides ive dedicated a lot into my grow room hoping now that its legal in oregon to become a grower for some of the shops that will soon be around any help or suggestions would be greatly appreciated thnx everyone MOWERMAN Less Content

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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

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 time oh ill be growing serious six and lsd when i feel good enough at this to start them but first i need help figuring out the little nuances of indoor growing im doing 10 starts and have room for 10 plants in my flower room not doing sog so 10 is all that will fit comforably5 ft x10 ft with 8 ft ceilling Less Content

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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

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. Never apply nutrients to a seedlings. There must be 4-5 alternating nodes; Or, 4-5 trues sets of leaves; Proof of an established root zone. I question your idea to use Flora grow, and Micro alone. I have never seen this, and I used GH flora 3-part for 5 years. In early stages of development, plants develop stronger root zones with the application of potassium. So; Bloom would be better than Grow and Micro... Feel free to join our support forum for more in depth grow info. :) Less Content

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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

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 these folks do !! look around at the competitors guarantee and you will see what i am talking about. my first order got snagged by the authorities. these guys re-shipped asap with no question. i was so impressed that i don’t even bother looking elsewhere ! do your self a favor and spent a few extra bucks and get the feminized seeds and no worries about male plants. even if you only got ONE OUNCE from a plant…that alone would be about a $300.00 value right there and you better get more than that or go back and read growing for Dummies…LOL. every seed i use has germinated so far without any problem. I have just one question to ask please. i live in an RV and had enough room for one 2×4 grow tent. i would like to be able to have some vegging while others are flowering. cant do that in the same tent obviously. can i veg my plants outside of the tent in normal day and night lighting as long as i provide the plants with high intensity 24 hours a day lighting closely above the plants and then move them into the 12 12 flowering tent when i harvest the ones that were in the tent ? secrecy is not an issue for me where i live and not afraid to have plants vegging outside of the flowering tent. PLEASE…i need the answer from a reliable source before i do something stupid and wasteful. Thanks in advance for any advice that you might have and good luck to you other new guys like me. Thanks again…Vern Less Content

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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

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 vegetative cycle, and 12/12 for bloom. Plants need rest just like human beings. Want proof. Read the ingredients on your multi-vitamins. Now; Read the ingredients on your high quality nutrients. You will find them surprisingly similar. :) Less Content

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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!!!!!!

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!!!!!! Less Content

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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

[…] 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 who have been warned – ‘never overwater your plants,’ so they overcompensate in the opposite direction. […] Less Content

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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

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 Less Content

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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”.

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". Less Content

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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 […]

[…] 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 […] Less Content

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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

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 coloration in the center of the growing flowers and slightly purple leaf stems. Hope someone has seen this before. Thank you and have a great day. Less Content

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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. 🙂

panos, I advise you to join our support forum. We have many knowledgeable members and experts always willing to help. :) Less Content

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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

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 they haven't grown any taller and the leaves are tiny. I'm thinking that it might be bad genetics. I need some help. Less Content

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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

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 suddenly 2 plants were like dying after being 40cms tall. I got panicked and went to see ..when I slowly pulled they easily came out.. My god I saw the stem and the skin was detached from the main root by some insects who ate it inside the soil... It thought a while and applied some neem leaves crushed water with salt for hopeful result. obserbed but same happened again.plants are sloely dying.. From 13 now 6 plants only survive presently. I am so desperate. Please help me out. I would like to send the video and pic of the situation.how can I do that.. I am in South India in AP where red sandy soil exists and the tclimate now is humid rainy and Lil sunshine.. Please someone respond asap.. With best wishes Niraj Less Content

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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 😀

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 Less Content

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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

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 the roots. Stop wasting. Let the soil dry completely( May take a week or more) and sprinkle a later of salt free sand on top of your soil. This creates a barrier that the larvae cannot escape from. Trapped and with nothing left to eat,they will die. Good luck. Don't use bonide. Unless you wanna taste it with every hit. Less Content

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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

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 for the future. damp and little sunshine is not a good climate for cannabis plants. There are so many reasons this could be happening. I look forward to seeing you at the forum. Just post @latewood to let me know you are in the community. I will try to help from there. Less Content

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By BikerBud
,18 Feb 2017

my leave’s have yellow spots on the veins what causes this?

my leave's have yellow spots on the veins what causes this? Less Content

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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

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 you out aftyer you post a couple pictures. :) Less Content

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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

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 Less Content

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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

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 our support community and tell us exactly what you have done. Too many variables in your case to give you an informed answer. Sorry :) When you join ILGM, fill out a support ticket Less Content

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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

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 her last time?plant is only 22 days with light cycle 18/6 with the 8 hours per day out to the sun and artificial 50w cfl for a bit while longer and then going out for the rest of her life.all these changes you think shocked her and need magnesium for fotosynthesis as see is young until now thats why can be magnesium? thank you very much!!! Less Content

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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

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 Less Content

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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

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) in another. Other 2 just smelled of a generic garden plant (not 420). 3 of the 4 smoked fine, just no taste/smell. Couldn't be just bad luck with all of them, could it? Less Content

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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

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 Less Content

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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/

You can post pictures on our support forum, our expert growers can take a look there and help you out! https://support.ilovegrowingmarijuana.com/ Less Content

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By chuck
,30 Oct 2018

I have tried to send pictures and they don’t go to you chuck

I have tried to send pictures and they don't go to you chuck Less Content

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