Guide for Diagnosing Plant Problems

budcacto

Member
Hello canabic friends, I'm new to the forum and new to cannabis cultivation, I read this topic I believe I should be having problems rotting roots, would that be right?
My substrate is 50% perlite 50% peat, I live in Brazil and my vegetation space is a pc grow with a fan cooler doing ventilation 1 LED 20w 1 led 8w 1 Fluor 20w
Plants are 3 weeks or so, in a light regime 18/6
In the first week I did watering with ph adjusted and ec 0.4
In the second week I did a watering with sensi grow A+B they had an improvement, but nothing that is normal for life time and size. I'm sorry if I'm posting in the wrong place, I'm new around here so I don't know how it works. I will post some pictures of how the plants were before the sensi grow and after.
 

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Pinky78

New Member
If be very surprised if the nutrients were there problem unless it's over concentrated. Sensi is cup winning organic nutrition. I always use Ancient Earth (also advanced nutrients) - it helps them absorb the nutrients more efficiently. I noticed a huge difference when I started
 

Pinky78

New Member
Also, you get Sensi grow for soil, or for coco. If you're using the coco mix for soil (or vice versa) it won't do as good a job as it should
 

richmoon16

New Member
Hi everyone! So I’ve been growing her for over a month or 2 now. And this is how she looks. Quite short I think for her age. But she started growing these little brown dots on some of her leaves. I’m not sure what the cause is. I hope you guys can help me. Thank you!
 

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budcacto

Member
Also, you get Sensi grow for soil, or for coco. If you're using the coco mix for soil (or vice versa) it won't do as good a job as it should
so, I'm using sensi grow in perlite +peat (sunshine mix), i did a watering with calmag and vaso transplanted. one was more recovered than the other. You think you think they're growing back normally now?
They're not even stretching looking for light, which may be a sign that lighting isn't the problem. I'm vegetating with 40w FLC and 23w LED bulb.

These photos are from today, at a time where I leave the girls in the sun, wet with 0.3ml Forth Rooter (to lower the ph of water, the initial ph of my house is between 7 and 8) + Sensi grow(a+b) 0.35ml for a total of 1L of water. The EC of the water was at 0.492, I'm without the PH meter I have no way of knowing if it is in the range, but I believe it stays because it is using perfect ph fertilizer
 

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Hi everyone! So I’ve been growing her for over a month or 2 now. And this is how she looks. Quite short I think for her age. But she started growing these little brown dots on some of her leaves. I’m not sure what the cause is. I hope you guys can help me. Thank you!
Look at the bottom side of leaves. May be spider mites. Use microscope
 

spek9

Well-Known Member
so, I'm using sensi grow in perlite +peat (sunshine mix), i did a watering with calmag and vaso transplanted. one was more recovered than the other. You think you think they're growing back normally now?
They're not even stretching looking for light, which may be a sign that lighting isn't the problem. I'm vegetating with 40w FLC and 23w LED bulb.

These photos are from today, at a time where I leave the girls in the sun, wet with 0.3ml Forth Rooter (to lower the ph of water, the initial ph of my house is between 7 and 8) + Sensi grow(a+b) 0.35ml for a total of 1L of water. The EC of the water was at 0.492, I'm without the PH meter I have no way of knowing if it is in the range, but I believe it stays because it is using perfect ph fertilizer
Looks like Nitrogen deficiency.

You really ought to get yourself a pH meter.
 
I don't see any white dots on the top of the leaves, nor any webbing in any of the pictures. Those are two first signs that appear with a mite infestation.
3.4. pictures i see dots, but yes it can be caused by led light. If its another problem, yes, I d let dry out soil and after that water with fertilizers
 

richmoon16

New Member
I don't see any white dots on the top of the leaves, nor any webbing in any of the pictures. Those are two first signs that appear with a mite infestation.
Hi thanks for your reply! I still really don’t know what’s up with my plant but she’s deteriorated quite a bit since my last post. I sprayed her with neem oil yesterday, and fed her nutrients as well. Here are her updated photos. Hope someone can help me. Thank you!
 

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spek9

Well-Known Member
What's this caused by
Very poor lighting for taking photographs in ;)

Turn off the grow lamps and either use your flash, or put the plants under normal lighting somewhere else in the house so we can actually get a proper visual.
 

blackgolem

Well-Known Member
What's this caused by
Very poor lighting for taking photographs in ;)

Turn off the grow lamps and either use your flash, or put the plants under normal lighting somewhere else in the house so we can actually get a proper visual.
Yep that could help... but what i can see is we may be in same boat. Don't know what he's growing in but my hempy buckets did this: first i thought to much water, then not enough water, then maybe its to hot down to 100w cob in 4 sq-ft when temps fall below 66 got a ceramic heater come on shielded down to floor. Wondering if heat caused it from heater but it would be first time. Any guesses?
 

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blackgolem

Well-Known Member
Yep that could help... but what i can see is we may be in same boat. Don't know what he's growing in but my hempy buckets did this: first i thought to much water, then not enough water, then maybe its to hot down to 100w cob in 4 sq-ft when temps fall below 66 got a ceramic heater come on shielded down to floor. Wondering if heat caused it from heater but it would be first time. Any guesses?
Sorry it took so long to get back to this post but my problem ended up being to much heat causing root damage. After pulling plant from medium(gently) I trimmed the slimy brown parts of the root system replanted and kept a close eye on how much water and nutes it got and kept the grow box temps better controlled and my plants revived. This info is for anyone visiting this thread that may have the same problems. this took about a week to show changes and another after trimming the dry brittle leaves offafter root rot damage was repaired.jpgStarting her comeback.jpgheat and root damage.jpgLeaves that need trimmed IMO.jpgSigns your plant is suffering.jpg
 

Kushash

Well-Known Member
Hi new to this and trying to figure out what is happening with my plants they looked great a few days ago but now growth has slowed down and are curling in and twisting was wondering if they are being overwatered
Welcome to RIU!
Looks like it's time to transplant to a bigger pot.
 

ROCKO123

Active Member
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
 

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