Guide to Nutrient Deficiency or Toxicity

Brianjox said:

I have forget. I read it some where. Stems/ veins go red is a deficiency off ???? We want those mothers cuttings green Green not woody. The deficiency is????

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I dunno, i wouldnt worry too much if thats all your seeing. some stems are just naturally a different color. as long as its healthy, dont do anything.

greencorral19 said:

Hey Doc, can you take a look at my thread and give me your opinion, didnt want to clog up this one with the hi rez photos.
https://www.rollitup.org/marijuana-plant-problems/644917-i-need-help-guru-growing.html#post8964996

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yea i just saw, ill reply on there. its pretty obvious.

I am into my 7th week of flowering having done 36 days on 12/12. All was fine up until about this time last week. I have the most severe deficiency with one of my strains but on multiple plants. Critical kush, grown in soil, vegged for 8 weeks. The most Wierd thing started happening to the leaves. Firstly small vibrant orange spots appeared towards the centre of the top sets of leaves, this has since engulfed the leaves within the vicinity and turned into a dark rusty brown. From this point I feared magnesium deficiency due to the tap water supply around here. But with me being so far into flowerin now in really worried its more serious. The leaves (once 80-90%) brown and crispy dry curl up at the tips. And then they almost just fall off the plant. They are starting to affect the buds tiny leaves at the very top causing maturation to slow down.. I'm really really worried as some have really slowed down growing and I really need some help..... Any suggestions based in what I have said? I've looked time and time and time again at common "defficiency lists and ways to try and diagnose them" and I keep coming back to either manganese, phosphorus or potassium..... Any help?!?!?!?!?

Hey everyone I need help with my bbyz, they been doin so good till 2 or 3 dayz ago I noticed they have been lookin pale or highlight green on new growth also smoothness nd shine iz gone. Leaves feel thinner new shoots are wilting nd feel soft, I'm growing toxic blue nd master kush I been feeding fox farm nutes grow big nd big bloom in fox farm ocean forest soil. PLEASE need help not sure wat it really iz I'm 4 1/2 weekz from seed they are around 13 to 14 inchez I have to switch to 12/12 today I don't have enough space to keep veggin they r growin too fazt mayb 2 inch a day.
Will greatly appreciate any suggestions nd help you guyz reply! I will try nd pozt pix later on my PC!
Thankz in advance

great threasd eay to find your problem great advice on here bid ups

wow im baked

yes nice thread all u need to kno......

I know its not gonna make a difference now as these ladies are just a day or two away from the chop, but it would be handy to know for future reference, never had this happen before with this strain but never vegged them for 8 weeks before either.. fed on advanced nutrients ph perfect range right up until day 56 of 12/12 with a further half strength feed on day 60 and a fresh water only drink on day 64. these pics are on day 65 and they are now on day 67. most of the trichs are cloudy but waiting for some amber before chopping. I have looked thru much info and photos and still cant put my finger on it... thought it was zinc but not so sure now...the strain is Belladonna from Paradise Seeds btw. View attachment 2669840View attachment 2669841 and heres some of their sisters, from same packet, fed same, everything identical from birth as it were yet no sign of this problem.... confused.com View attachment 2669848View attachment 2669850

good shit boss im on my 1st one and u answered alot 4 me good lookin

These pics helped me out a lot with identifying the problem in my plants, i have a calcium deficiency and i don't know what to give the plants without throwing off my current nutrient schedule. any help, (besides adding milk...lol) will help me tremendously

OxDaNig said:

These pics helped me out a lot with identifying the problem in my plants, i have a calcium deficiency and i don't know what to give the plants without throwing off my current nutrient schedule. any help, (besides adding milk...lol) will help me tremendously

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Calcium is a tough one. its a heavy mineral, so other then milk theres not too many ways of getting it in there. Egg shells are great, but a slow process. Id say find something that contains calcium, in a liquid.

Make sure its a calcium Deficiency tho, its not common. Post some pics and lets see

calcium def...View attachment 2697637

Great post, book marked for future reference & +repped you

Im not sure what could be wrong with my plants. Please help. Bottom leaves turning yellow then brown. Then the regular leaves are starting to turn yellow on the tips?

Thank you nick17gar - Great thread! I'm a N00b and this is my first grow; I've known a few people that have grown and so I'm not totally green.
Here is the grow:
View attachment 2702120
The 3 plant's in individual 7gal pots are 9 weeks old and the two in a 10 gal pot are about 4 weeks all are in Happy Frog soil I'm having problems with one of the older ones in the 7 gal... see the older ones acidentallity got watered for the first couple weeks with "water softened" basically with salt so I'm wondering if my problem has something to do with lock but there are no problems with the other two?
This is the plant with the problem

you can see a few of the leaves have "spots" it seems to be on older growth and "burns" through the leaves:

this is an on the plant shot you can see one of the leaves clearly has spots

This is the back with a flash you can see the spots.

I thought that it might have been a chemical burn but I've been watering with just 6.5 water for the last 3 weeks but it hasn't got any better so I'm trying to figure it out before it spreads.

RIU ROCKS

For a first time grower experiencing a few issues, this is one of the most useful threads on the site. Props guys!

I looked and cannot find my issue.
Autoberry @25 days
450w LEDs 5gal Bubble bucket ph 6.0 1200 ppm 24/0 lights 78-81F 38-45 humidity
Some of the leaves have darker veins, The plant is growing super fast. I added nutes at day 21 and it is now day 25
And a few tips just started to curl down
Magnesium? Iron? Zinc?

Hey guys, this thread is great.
I still need some help though.
My plants are in their early budding stages, hydro. One AK48, one Aurora Indica. The AK48 is showing a fast growing nut problem which I am now quite certain is Nitrogen related - the bottom leaves are becoming yellow, drying up and falling off, some top leaves have discoloration towards the edges.
However, I have no idea if this is too much Nit or too little. This started fairly recently (2 weeks?), perhaps in correlation to when I started feeding it flowering nuts (so maybe that would indicate a deficiency?). I have also flushes the system a couple of weeks ago, so it would be relatively clean.
Anyone got an idea what I should do? Thanks

BTW, they both grow in transparent boxes, so I can see the roots if that's any help

Mashunaut said:

Hey guys, this thread is great.
I still need some help though.
My plants are in their early budding stages, hydro. One AK48, one Aurora Indica. The AK48 is showing a fast growing nut problem which I am now quite certain is Nitrogen related - the bottom leaves are becoming yellow, drying up and falling off, some top leaves have discoloration towards the edges.
However, I have no idea if this is too much Nit or too little. This started fairly recently (2 weeks?), perhaps in correlation to when I started feeding it flowering nuts (so maybe that would indicate a deficiency?). I have also flushes the system a couple of weeks ago, so it would be relatively clean.
Anyone got an idea what I should do? Thanks

BTW, they both grow in transparent boxes, so I can see the roots if that's any help

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420th post NICE!!!