Guide for Diagnosing Plant Problems

Well, Molybedamed. Who would have thunk it?

Stuck em in the ground two weeks ago and about a week ago, they started doing THIS: all the new growth is YELLOW. WHY is that?

Thanks,

MEC

Iron deficiency.

Try some Cal-Mag plus if you can. There are other ways of getting what you need.

Snow,

I'm going to assume that this was diagnosis for my yellowing. Cal mag it is and how long will it take to straighten it out after application?

Thanks,

MEC

It actually will be pretty quick. Probably within 48 hours after application. There might still be some splotches of yellow that stick around forever on those leaves, but for the most part they should green up rather quick.

The new sets should look healthy. A plant really doesn't need a lot of iron. Maybe 5 to 10ppm, so just a little bit is going to go a long way.

I NEED HELP lol...........OK ive read all this stuff, and i dont have a clue.......can someone please help me!!!! i posted a thread on the issue... https://www.rollitup.org/marijuana-plant-problems/420001-i-bite-off-more-than.html


pleaseeeeeeeeeeeeeeeeeeeeeeeeeee

oops, posted in wrong thread, too many windows open...

Hi (I trust),
My young girl has white spots within (not on) her leaves, also many of the upper leaves have only 3 and not 5.

Any ideas to help ?

Thank you all.

Pedro.

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...

i have a super lemon haze plant that has 2 of its new leaves like bitten off sort of but i have no bugs i have a thread on it but no one has answered it yet. id appreciate it if anybody will check it out and try to help me find out whats wrong with it. im new to rollitup

cstoebs said:

i have a super lemon haze plant that has 2 of its new leaves like bitten off sort of but i have no bugs i have a thread on it but no one has answered it yet. id appreciate it if anybody will check it out and try to help me find out whats wrong with it. im new to rollitup

Click to expand...

Do you have a cat?

nope no animals its in a locked grow room can it be from ph fluctuation cuz i accidentally added the wrong water with 8.0 ph a couple of times....

its a really healthy plant great pheno its also like that on my sour diesel and kushage im growing too but not as bad... after adding good ph newer growth doesnt have that

I've seen that before on my own plants and never found a real cause for it. I always chalked it up to me being a little less than careful when watering them.

I cannot think of anything other than bugs or the grower. What I did was drop a hotshot no pest strip in the tent for like 3-4 days just to be on the safe side and kept a lookout for anything under each leaf. I had a group of caterpillars DECIMATE an outdoor garden of mine so I'm always cautious.

Stay vigilant and hope you did it yourself.

yea im pretty sure its just ph fluctuation cuz after i a couple of days of giving it 6.5 ph water the new growth was back to normal thanks a lot man

I am growing a green crack clone and can't figure out what is wrong with it. Everything I read is so conflicting. Some say its fine some say its mg defi some say temp change. Anyways it was a nice green plant and now its purpling stem and leaves and turning like a light green, but is growing ok (slow). Any other suggestions?

Deficiency/Nutrient Burn pics
I take no credit for the info contained herein....

I am in flowering stage and have some leaf discoloration or dying, near top of plant? I am fairly new to this, this is a Hydroponics grow, using Technaflora's BC Bloom products, and T5 lights. Do you get nutrient deficiencies when using these all in one products? or is it something else?

Hey everyone. Here's a pic of a couple leaves on the same plant. In real life the blotches are much darker, almost black. Can't imagine being a deficiency, last time i fertilized was 7-7 with 1/2 strength Advanced Nutrients.

last watering was 7-9 ph=6.5

plants are Clones, in fox farm happy frog and perilite. little over 3 weeks old.

Nutes are Advanced Grow, micro, bloom with, superthrive, silica blast, voodoo juice and b-52.

Temps 70-80
Humidity 30-50
using 450 watt MH

Plant otherwise looks healthy. damage seems to be on older Fan leaves. thanks a lot for any help.

awsome guide would you mind if i added remedy for all the simptons and the best and quickest way to applt them? :O)