Guide for Diagnosing Plant Problems
- Thread starter shenagen
- Start date
Aahh got it. I was thinking I wasnt watering enough but thank you I will get on that.
WakeBake
Well-Known Member
You will be surprised how little water these guys actually need. I am growing outdoors and even at 42° Celsius I water them like once in 3 days.
Just make sure to water enough so that 10-20% drains out from the pot. This will make sure root tips have enough water and soil is moist all the way down. Water when top 2-3 inches of soil is dry. If top layer looks dry and an inch under is still moist, then refrain from watering.
Thank you I just screenshotted this to follow by now . I appreciate the advice!
WakeBake
Well-Known Member
Looks like a Iron deficiency. Yellowing is inside out and on new growth. Iron deficiency is immobile.
How to fix Cannabis Iron Deficiency (Fe) Pics & Symptoms
Problem: A cannabis iron deficiency causes bright yellow leaves on new growth. This deficiency is usually caused by problems with pH.
www.growweedeasy.com
Roger A. Shrubber
Well-Known Member
i'm guessing a serious iron deficiency, usually brought on by your ph being too high. don't ever go above 6.5 in soil or coco, or you get something that looks a whole lot like that
Roger A. Shrubber
Well-Known Member
if you're talking about the cotyledon leaves, thats what they do, they're packed full of nutrients, and feed the plant till it can get itself established and put out some roots, then they turn yellow and fall off, which should signal that you're plant is doing alright, if it looks healthy other wise, but you do have to start feeding now, if you aren't in soil
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gorillamotors
Member
I have a problem with leaf tips being yellow/brown. The top leaves are fine but the bottom half of the plant the eaves are as shown in the photo. Analysis please?
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Roger A. Shrubber
Well-Known Member
what kind of medium are you growing in?
what kind of lights are you using? what cycle?
what kind of nutes are you using? how much? how often?
looks like you're over whatever it is, the new growth is coming in much better.
that could be anything from light burn to a potassium deficiency that has since corrected itself...are the bottom leaves still effected, still showing new damage? or do they seem stabilized now?
gorillamotors
Member
My media is a combo of coco coir, compost, and vermiculite.
I am using Horticulture Groups 550 Red led panel with 16 on 8 off.
I am using the General Hydroponics 3 part Flora series. I was feeding about 1 cup fertilizer every other day then about 2 cups water every other day.
I read that it could be over nutrition. So I just used 2 cups water every day to flush it out. I also saw that I could be a lack of potassium. On the 5 day of just water I added a teaspoon of straight potassium to the water and fed it to them. So somewhere between over fertilizing and lack of potassium the problem got fixed.
I am using Horticulture Groups 550 Red led panel with 16 on 8 off.
I am using the General Hydroponics 3 part Flora series. I was feeding about 1 cup fertilizer every other day then about 2 cups water every other day.
I read that it could be over nutrition. So I just used 2 cups water every day to flush it out. I also saw that I could be a lack of potassium. On the 5 day of just water I added a teaspoon of straight potassium to the water and fed it to them. So somewhere between over fertilizing and lack of potassium the problem got fixed.
vancouverseedcanada
Member
WOW! the details about the diagnostics are easy to understand. Thanks! for this information. We can now find remedies for these diagnosis.
Hello please is this cal mag defficiency overfeeding or what ? I am growing in soil maybe 6week since switching to 12/12 feeding with around 15ml plagron terra bloom and 5ml Green sensation 4.6ml metrop aminoxtrem for 5l of water and sometimes i add gh calmag in very little doses with PH 5,5 to 6,5 lights mars hydro tsw2000 are maybe 25cm from tops
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Mr.Miagi77
Active Member
Anyone wanna take a guess at the issue here?
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Roger A. Shrubber
Well-Known Member
i'm going to say calcium deficiency.
https://www.growweedeasy.com/cannabis-plant-problems/calcium-deficiency
this is a link to the parent site for that ^, been very useful to me for a long time
https://www.growweedeasy.com/cannabis-symptoms-pictures
Week4@inCharge
Well-Known Member
Yup..phosphorous..dammit..well thanks for the list.. Seabird Quano in da mail!
Roger A. Shrubber
Well-Known Member
could be. i would suggest pouring a couple of gallons of ph'ed water with no nutes in it through the effected plants, letting them dry up a little after that, and then reading the labels of all the shit you're feeding with, and adjusting the ratio you're using them at till it approaches the Jack's 3-2-1 ratio as closely as possible. also, make sure your ph isn't too far off. if ph is low, phosphorous can react with iron and zinc and become unavailable, if it is too high, phosphorous can react with calcium, and become unavailable.