Guide for Diagnosing Plant Problems

ROCKO123 · Jul 29, 2020

shenagen said:
OK here is a start of some links........
THE MARIJUANA GROWER'S GUIDE..........by Mel Frank & Ed Rosenthal
This is some of Ed Rosenthals book...good read

International Cannagraphic Magazine Forums - The Complete guide to Sick Plants,pH, and Pest troubles!
One of the better sick plant guides I've come across

Cannabis Nutrient and Deficiency Table

https://www.rollitup.org/general-marijuana-growing/1469-marijuana-plant-problems-cures.html
This one is definately in the wrong area...I was on this site for over a month before I used it.

http://www.ganjaguerrilla.net/index.htm

I'll update this list as I find more usefull info

HELP!!!!

Mars Hydro ts-1000. I’ve noticed the tips of the lower 1/2 are browning/yellowing. Only a couple up top barley have it. What’s wrong?? It’s starting to make its way up to the higher leaves.

I see pre flowers and switched to 1/4 bloom nutes. And tapering off on veg.

2ml tiger bloom
2ml bud
3ml cal mag
5ml My Weed Minerals

Pineapple Auto (growers choice)
Light: 18/6
ph:5.9
RH 52%
temp: 75f
Soil: fox farms ocean Forrest

Kyzersozay · Aug 2, 2020

Is this a cal/mag deficiency or something eles

FireBudzz420 · Aug 2, 2020

hey guys needs some advice, my plants are healthy for the most part in flowering atm ive noticed the leafs are starting to curl some im using foop organic biosciences alll organic nutes with promix HP soil i think it my by nitrogen toxicity or maybe lack of nitrogen. i also notice what to me looks like light nute burn on the leafs wdu think? thanks

FireBudzz420 · Aug 2, 2020

blackgolem · Aug 3, 2020

Kyzersozay said:
Is this a cal/mag deficiency or something elesView attachment 4642774 View attachment 4642775

blackgolem · Aug 3, 2020

FireBudzz420 said:
hey guys needs some advice, my plants are healthy for the most part in flowering atm ive noticed the leafs are starting to curl some im using foop organic biosciences alll organic nutes with promix HP soil i think it my by nitrogen toxicity or maybe lack of nitrogen. i also notice what to me looks like light nute burn on the leafs wdu think? thanks

reduce temps give a flush if you're in soil. reducing temps will produce more trichs i here but then some farmers don't worry about that little curl at this point in the grow maybe that's why no one has chimed in but that is only my 2 cents. good luck with the grow. I stuck a chart for plants in a post on this page check it hope it helps

Kyzersozay · Aug 3, 2020

Thanks, im using sensi cal/mag as a folier spray, hopefully in a couple days I should see some improvement

blackgolem · Aug 3, 2020

Kyzersozay said:
Thanks, im using sensi cal/mag as a folier spray, hopefully in a couple days I should see some improvement View attachment 4643602

3 weeks to harvest looks like you'll have to hang on. Those little white spots is that from lights being to strong? might need to add a mill more i think looking at the leaves lightening at outer edges a little more P somebody help am I right?

FireBudzz420 · Aug 3, 2020

blackgolem said:
reduce temps give a flush if you're in soil. reducing temps will produce more trichs i here but then some farmers don't worry about that little curl at this point in the grow maybe that's why no one has chimed in but that is only my 2 cents. good luck with the grow. I stuck a chart for plants in a post on this page check it hope it helps

thanks.

Kyzersozay · Aug 3, 2020

blackgolem said:
3 weeks to harvest looks like you'll have to hang on. Those little white spots is that from lights being to strong? might need to add a mill more i think looking at the leaves lightening at outer edges a little more P somebody help am I right?

It's only been 4 weeks of flower giver or take ...i switched them ton12/12 on June 29, and since about then I've been dealing with spider mites and this deficiency has only been the last 3 weeks or so, prior to the switchbibwas only using a pro mix root booster, since the switch im using big bud, and sensi cal/mag now, for the mires I used a homemade spray, of 10ndrops of neem oil to 5 drops of dish soap and 10 drops of lavender oil, first spray did a decent job on the mites but when I sprayed 5 days later it cooked 70% of the pistles..ias for the lights I havent had a problem before..there noah s 1000w x 2 so not sure if they'd be doing something now..they are about 24inchs from the tops

Kyzersozay · Aug 3, 2020

Kyzersozay said:
It's only been 4 weeks of flower giver or take ...i switched them ton12/12 on June 29, and since about then I've been dealing with spider mites and this deficiency has only been the last 3 weeks or so, prior to the switchbibwas only using a pro mix root booster, since the switch im using big bud, and sensi cal/mag now, for the mires I used a homemade spray, of 10ndrops of neem oil to 5 drops of dish soap and 10 drops of lavender oil, first spray did a decent job on the mites but when I sprayed 5 days later it cooked 70% of the pistles..ias for the lights I havent had a problem before..there noah s 1000w x 2 so not sure if they'd be doing something now..they are about 24inchs from the tops

Sorry the spray was also mixed to 1l of water

snekonomics · Aug 4, 2020

Is this minor discoloration of new shoots something to worry about? Few days after topping the plant on 3rd node, switched to more powerful grow light, should be about 500 umol ppfd. Coco with Flora series + CalMag + Fulvic + Si.

DR8699 · Aug 10, 2020

I need some help!! My girls are looking worse and worse everyday. The spotting/yellowing rotten banana look is spreading to more plants.

What is happening to my plants?

blackgolem · Aug 12, 2020

DR8699 said:
I need some help!! My girls are looking worse and worse everyday. The spotting/yellowing rotten banana look is spreading to more plants.

What is happening to my plants?

Not pretending like I know for a fact but looks like maganeese problem throw some epsom salts around the base and water being outside I hope you dug a big hole and filled with your made soil combined with time lapsed ferts? But any way I would try the Epsom Salt first but again this is just my opinion and doesn't have to be right. what have you tried? Outside growing I've never done. Understand it does take care with lots of bugs and other things though but good luck

blackgolem · Aug 12, 2020

snekonomics said:
Is this minor discoloration of new shoots something to worry about? Few days after topping the plant on 3rd node, switched to more powerful grow light, should be about 500 umol ppfd. Coco with Flora series + CalMag + Fulvic + Si.

View attachment 4643973

I think when new shoots show they have a lighter color and darken with age like lettuce I'd just keep an eye on the edge curl maybe cut back a little on the nutes other than that they look healthy

blackgolem · Aug 12, 2020

Kyzersozay said:
Sorry the spray was also mixed to 1l of water

I could be wrong but I wouldn't spray while in flower could cause mold. If your'e spraying for infestation only spray the backs of the leaves at lights out. if its a gnat problem cover the tops of your medium get a few fly strips maybe anything to keep those girls from suffering. She looks tasty already!!!!

BMWM5 · Aug 16, 2020

Greetings from London.
Can anyone identify my defiency.
Love u all

blackgolem · Aug 23, 2020

BMWM5 said:
Greetings from London.
Can anyone identify my defiency.
Love u allView attachment 4655095 View attachment 4655096 View attachment 4655097 View attachment 4655098

When I start to see edge curl like that I first think over watering and heat issues. Came to realize that root rot or damage causes problems like these. My temps were not right and at lights out I had no temp controls that was dumb after fixing buds have grown well try letting medium dry more get temps right during lights on and off and be careful with your nutes red stems generally are a sign of temp fluctuation. just my 2 pennies

Lyonsie · Aug 31, 2020

I still don't know what mine need. I'm starting to think I just got bum seeds

Lyonsie · Aug 31, 2020

Guide for Diagnosing Plant Problems

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