Guide to Nutrient Deficiency or Toxicity

great thread. thanks

http://www.growweedeasy.com/marijuana-symptoms-pictures

I don't know if this had been posted already or if we are allowed to redirect to another site, I'm in no way affiliated with them but the pics are helpful in identifying what's going on.

Help...I came home from work as saw this. I have a small thrip infestation which I treated last night with soapy water. Other than that I have been fully organic using roots soil with a few organic amendments added to it. What has caused this?

My new go-to guide when problem's arise...thank you, great post!

I've heard several people complain about that when using roots, gnats as well, I'm not bashing them in any way I'm just saying I only bought one bag now I only buy hp p mix. I've never had pests in my grow room until I bought roots, now I can no longer make that statement, something about not sterilizing the soil in order to keep beneficial bacteria. Look it up to be sure but that is what I've heard and experienced. Look at my post right above yours, click the link, it shows an exact replica of your pic there with advice on how to solve it.

You forgot to say 5.8 for soiless like peat moss pro mix!!!

very informative thnx

Terk1974 said:

I've heard several people complain about that when using roots, gnats as well, I'm not bashing them in any way I'm just saying I only bought one bag now I only buy hp p mix. I've never had pests in my grow room until I bought roots, now I can no longer make that statement, something about not sterilizing the soil in order to keep beneficial bacteria. Look it up to be sure but that is what I've heard and experienced. Look at my post right above yours, click the link, it shows an exact replica of your pic there with advice on how to solve it.

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ts the ph I believe... I'm having issues here and there with roots organics stuff too. But still much better thn foxfarm and many others tho imo.
Foxfarm had more thrips/gnats for me. Especially ocean forest. But yeah ro brand potting mix is acidic in ph if I'm thiking right. Causes more defciencies easily, and any extra stress or mistakes... and it really shows. But done right roots is great stuff. Very popular right now too.

It looks just like the ph issue I'm the link terk provided. It cleared up when I topped dressed with Oystershell and dolomite lime.

smellzlikeskunkyum said:

ts the ph I believe... I'm having issues here and there with roots organics stuff too. But still much better thn foxfarm and many others tho imo.
Foxfarm had more thrips/gnats for me. Especially ocean forest. But yeah ro brand potting mix is acidic in ph if I'm thiking right. Causes more defciencies easily, and any extra stress or mistakes... and it really shows. But done right roots is great stuff. Very popular right now too.

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The thrips were wiped out easily with Monterey garden insect spray with spinosad. It worked like a charm

Yep soap pesticide etc... like spinosad... bought some spray at the dro shop. Thrips are bye bye.

I'm a firm believer in hot shot no pest strips too. Saved a whole house with em. Thrips and mites hate them but they don't work for gnats/flies.

And dear god does roots organic "Surge" stink bad. Careful! Its way more concentrated than some of their other nutes. Lil bit goes long ways. Use roots- buddha grow and bloom and with proper conditions u get great results. Easy too. The bloom has Cal in it too. I have the HP2 nute too. 0-5-0 npk. Liquid bat guano.
Its already showing improvements in later flower adding the HP2. The Surge is 2-2-0.5. So aslong as u know what ure doing u can use it allthe way up to thend as long as u back off of it for the high nitrogen.

Use roots trinity too but don't understand it fully. Geussing its much like using organic real deal molasses from cane. In a way idk... I used to get by on cheap 10-10-10 by viogro and that good molasses with a bit of epsom salts too. It DID work. But the cheap nutes kill good bacteria n stuff. So the real nutes are better imo/ime.

Thrips are more common than people think too btw. Little nasty vampires that suck upthe plants juices/nutes, stain leaves typically as they eat up them up. Can screw upyur nutes evenif bad enough.

whats this look like ?? https://www.rollitup.org/t/is-this-led-light-bleaching-or-what.865964/

Can anyone tell me why fan leaves are looking like this? Been flowering three weeks in coco ppms around 600-700 and ph perfect. I drain to waste. Had to use a foliar for a small bug problem two days ago. Thinking it burned leaves maybe? Idk it looks unlike any burn I've ever seen if so.

Josh2015 said:

Had to use a foliar for a small bug problem two days ago. Thinking it burned leaves maybe? Idk it looks unlike any burn I've ever seen if so.

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I've seen that pattern before. It looks like mg because it's between the veins. But, it's so blotchy, with clear edges (like digital camouflage) it doesn't look like mg def. It was also a creamier/tan color, not the fade into yellow like mg def.

Back when I had it, I found a deficiency chart which showed the exact same thing and it said "ph fluctuation." But, I've since done some crazy things with ph (like watering with hydrated lime at ph 10) and haven't seen it again. So, I'm inclined to believe that deficiency chart was wrong.

I've since suspected it was light burn from water on the leaves. And, that this unusual pattern was a result of the water spreading more than beading. I've wiped off beads and had faded areas that were exactly where I wiped it down (the water remained smeared).

If what you fed had a surfactant to spread the insecticide, and if you left your plants under the lights while it was wet, I think it was light burn (magnified by the water). Maybe and/or the ingredients burning?

I think magnifying bc after I sprayed and it dried there was still a clear film. And it's like the green from the lead is flaking away. It almost looks between veins but a lot of other spots are just wherever no rhyme or reason. I sprayed rosenthals pesticide. Pretty reputable stuff I thought. And I diluted 50:50 with water. Idk burnt hairs a lil as well. Effin spider mites

Just wanted to get a few opinions on this.
I believe it to be a calcium issue but could be wrong.
Any thoughts? Thanks

I didn't see pics of this can u all help?

outdoor plant in large pot. I made up my own potting mix. started with MG potting mix, added perlite, peat moss, worm castings, crushed egg shells. feed fish emulsion, dr earth nutes. my 4th grow. overall my plants are doing well but one plant had this starting on a couple of the lower fan leave. I was thinking calcium deficiency but would appreciate your thoughts on a solution. Thanks!

here is the plant for post 580 ... overall, she appears to be doing well