Guide for Diagnosing Plant Problems

xylem1

New Member
Hi all - I'm waaay new to this forum, and to growing. I have a question I'm hoping someone here can answer - I've got two new plants, about a month old (maybe 3-4 inches). The leaves on one of the plants are twisting (as opposed to curling up) at the ends. Any idea what might be causing this? One friend said it might be a result of having given too much food too early. Any insights are greatly appreciated
 

cannn

Well-Known Member
My plants leaves are, from the bottom up, turning completely yellow and dying at an intense rate. The very tips of all the leaves are brown. Upper leaves are becoming somewhat yellow in the center and the green is pale and yellowish. I tried epsom salts (in case of magnesium deficiency) but nothings improved.
 

NyQuilkush318

Well-Known Member
20140721_175948.jpg 20140721_175945.jpg Can someone please help me out and tell me what this could be I been following for 54days sativa strain soil ph 65 ffof happy frog soil mix lime temp wright humidity wright
 

Crashtest1981

New Member
Someone help! I went and checked my ladies yesterday morning and all was fine, this morning I walked out to a bunch of droopy yellow leaves. It looks like nitrogen deficiency but I just fed them 2 days ago. I'm afraid to give them anymore because I've already dealt with toxicity. (Learned the hard way to check the RO tank before getting water out of it, we use it for our saltwater tank at my work and they were getting ready to do a water change so it had salt in it already. Ladies don't like a bunch of salinity.) I don't know what to do and can't afford to stress them anymore.
 

NyQuilkush318

Well-Known Member
What's ur runoff what's ur n going water n is u useing tap water an how long u been flowering for what size pots soil u useOTE="rocko369, post: 10797600, member: 844210"]Can someone help me out my plants are turning yellow im on week 6 and its a soil grow roots organic
Also adding
10 ml of bio thrive weekly
5 ml of calmag weekly
5 ml bio bud weekly
5 ml of bio marine
Rocko[/QUOTE]
Wha
 

pioneer87richard

Well-Known Member
Hi can anyone tell me what they think the pproblem with this plant isimage.jpg I think it might be a ph problem but I thought is see what u lot think thanks for any help
 

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n!n.budz

Member
I came across this neat little list that can probably help a lot of people out. If you like it check my post in the General area...I need some help!

Quick Deficiency Guide

Nitrogen: Entire plant is light green in color; lower leaves are yellow; growth is stunted....

Phosphorous: Entire plant is bluish-green, often developing a red or purpleish cast; lower leaves may be yellow, drying to a greenish-brown to black color; growth may be stunted...

Potassium: Leaves have a papery appearance; dead areas along the edges of leaves; growth is stunted...

Magnesium: Lower leaves turn yellow along the tips and margin and between the veins; the lower leaves wilt...

Calcium: Young stems and new leaves die...

Zinc: Leaf tissue between the veins is lighter in color; yellowed; papery in appearance...

Iron: Leaf tissue appears yellow, while the veins remain green...

Copper: Leaf edges appear dark green or blue; leaf edges curl upward; young leaves permanently wilt...

Sulfur: Young leaves turn pale green, while the older leaves remain green; plant is stunted and spindly...

Mananese: Growth is stunted; lower leaves have a checkered pattern of yellow and green...

Molybdenum: Leaves are stunted, pale green, and malformed...

Boron: Young leaves are scorched at tips and margins...
can u use organic house hold items like a banana for potassium lol
 

D13-blaze420

New Member
I'm a new grower indoors. I found 3 seeds in some bud I had germinated them in glass of tap water. Only 1 sprouted. Planted it after doin the following paper towel method. Odd thing happened tho, once seedling broke medium it had a weird curl to it about a cm below the cotyledon makin the four baby leaves faceing almost 3 O'clock sideways. Should I leave it and see what course it takes or throw in the towel get more seeds and start over???
 

Bokie

Member
Can any one help me!! I've just started grow in a grow tent with a 600w mh light anyway my seedling had yellow tips on the bottom set of leafs and over night all the leaves have be affected??? Can anyone help me with this ?im just using a cheap potting mix with some blood and bone is it ! Would the blood&bone be the problem ????image.jpgimage.jpg
 

dizzasta

Member
HI everyone
I've done a lot of reading and am still lost. I have a very young baby girl goin. she is in a top drip system in perlite. under cfls . now from the time I took her from the paper towel she started in and put her in the system she has been receiving filtered ph'd water with just the slightest amount of fish fert 5-1-1 at around 1/8 strength. for her first week she looked AWESOME! I was very excited. then her leaves turned up and she laid down. I propped her up a little bit and now she is Turning yellowish Brown and looks to be dying :,( I need help here guys...... I've already cut the light in half and moved bulbs further away. I've diluted the reservoir with fresh water. Idk really what I'm doing il be the first to admit that.. I am VERY new to this and would appreciate any help
I don't wanna kill off yet another lil girl
 

lemmy714

Well-Known Member
image.jpg Please help. What caused these yellow speckles on leaf. Using roots soil with added amendments. Temps are between 75-79f. Humidity 45%
 

ZoBudd

Well-Known 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
love that ICMag sick plant guide! Thanks for sharing!
 

SnotNazi

Well-Known Member
So I done fucked up..... My question is should I even try salvaging this mess? The first pic is how it looked after water full strength nutes (too much) the next two are from today. Believe it or not it looks better than yesterday . . . . . .:? I trimmed the leaves once already and if I decide to salvage it will be transplanted into a 5gal pot.
 

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