Guide for Diagnosing Plant Problems

hi guys i have plants in the green house i been told only water 2 times a week but it so hot in there soil drys quick and i dont wanna wake up soom day to see them all wilted there pic of the bad 1 and pics of some of my others
i used to water every night just a light soak but even with out watering them every day they seem to be growing fine i fuked 2 up preplanted 2 early just hoping it drop leaves off and new 1 appear

did anyone see the plants on the news for medical reasons in uk

If the problem is in the PH levels from the beginning does getting the PH levels correct, then adding nutrients like fox farm to the mix help the overall problem? Or will one have to get PH levels right, then fix all the little things (each individual nutrient problem) or will it fix itself over time? Wanna know whatca think, and yes have went to the favorite sites to find out what's wrong, but still have questions.


Duffman

Excellent guide Sticky. Thanks. I have a problem with an NFT grow - not too sure what it is, and your pics & descriptions haven't quite nailed it for me. This is my first post to rollitup, so I wasn't sure if this is the right place to post pics & details. Should I go on, or post elsewhere on the forum?

Thanks for the info. I have a question though. I read that i may have a salinity build up, lack of N, and possible chemical burn. Can someone please help me differentiate? We started with yellowing leaves on our flowering plants and now 75% of the leaves are yellow. I water them with distilled water and a tea of molasses, worm castings bat guano and sea weed extract once every 3 feedings and water twice every 3 feedings. I was going back and forth with my recipe trying to find a good tea. I thought it was heat so I bought an AC and now their at around 70 degrees but still yellow. So now i am thinking its salt build up(not sure what to do) or i have to much potassium causing little uptake of n.p
Also on some of my clones the leaves look singed at the end. and some of these leaves are yellowing also.

Im freakin out so if anyone could help it would be greatly appreciated!!!!!!!!!!

jadedkurt said:

Thanks for the info. I have a question though. I read that i may have a salinity build up, lack of N, and possible chemical burn. Can someone please help me differentiate? We started with yellowing leaves on our flowering plants and now 75% of the leaves are yellow. I water them with distilled water and a tea of molasses, worm castings bat guano and sea weed extract once every 3 feedings and water twice every 3 feedings. I was going back and forth with my recipe trying to find a good tea. I thought it was heat so I bought an AC and now their at around 70 degrees but still yellow. So now i am thinking its salt build up(not sure what to do) or i have to much potassium causing little uptake of n.p
Also on some of my clones the leaves look singed at the end. and some of these leaves are yellowing also.

Im freakin out so if anyone could help it would be greatly appreciated!!!!!!!!!!

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I did not read any previous messages in this thread so I do not know if anything earlier was said or asked that would make the following useless but have you checked your pH level? Something else I would be curious about is before the leaves began to yellow what color were the leaves? Of course I do not mean were they any color other than green but instead were they an average normal healthy green or were they a deep dark green that from some angles looked almost blue-green at times?

They were healthy green. I measure my ph of my water/tea every time I water. I keep it at 6.3(per my friend who taught me....his look great).... i thought it might be a N deficiency but I have boosted it since and no change, thats why i thought salt buildup.......

jadedkurt said:

They were healthy green. I measure my ph of my water/tea every time I water. I keep it at 6.3(per my friend who taught me....his look great).... i thought it might be a N deficiency but I have boosted it since and no change, thats why i thought salt buildup.......

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Next question. Where on the plants did the yellowing first begin and in what direction did it travel to first?

Some common causes for leaves yellowing starting on the upper portion of plants are:

Fe - IRON (Fe)
Leaves on growing shoots turn pale and veins remain dark green. pH imbalances make iron insoluble.

Mn - MANGANESE (Mn)

Necrotic and yellow spots form on top leaves. Mn deficiency occurs when large amounts of Mg are present in the soil. Foliar feed.

For middle leave a likely cause could be:

Mb - MOLYBDENUM (Mb)
Yellowing of middle leaves. Foliar feed with fertilizer containing Mb.

For older leaves:

N - NITROGEN (N)

Pale plants, red stems, smaller growth. Rapid yellowing of lower leaves progressing up the plant. Add any chemical fertilizer containing N. Treated plants recover in about a week.

Mg - MAGNESIUM (Mg)
Lower leaves yellow and may even turn white while veins remain dark green. Blades die and curl upward.

When you think about where the fading began and how it progressed does any of the above appear to fit the situation?

anyone seen this before (see attached)

that was the only blade on the leaf that was affected, and the rest of the plant looks fine. about 2 days into flower.

@jadekurt.

what are you feeding them? I see worm castings, bat guano. Are you using any other nute formulas? If so? what? what is the NPK value? I would bet its N deficiency. I've been there. What flowering/bloom lineup? or is there one?

For one, I checked the NPK of both worm castings and bat guano, and they're both fairly low in N. What N based product are you using because you said you gave them some.

whats up riu, anybody know what this could be? nute burn? MAGNESIUM def? I use ff bigbloom, used it for the 2nd time last watering. I used a tablespoon for almost a gal of water. I also add a little epson salt to every other watering, to try and prevent lockout. the pH of my water is usually around 6 or so but my soil (ff ocean forest) is alway around 8,,is that too high? I bring the pH of my water down with vinegar, usually 2 teaspoons per gallon. Sits under 6 6500k cfl's, temps anywhere from 77-84. Thanks for any help!

yes mate! jus clicked this post at random an BANG! found the prob with my plant on the first line of Deficiency Guide! many thanks my freind!
happy smokin!
safe.

buraka i think youre ok, that doesnt look like anything too too serious. as long as it doesnt happern again on any other foliage..

first of all thanx for the guide at the start much help... how can i give my plant a quick boost of Nitrogen as my bottom two sets of leaves are turning yellow from tip inwards and its just started flowering... any tips cheers

I used Organicare® Nitrex (6-0-0) i did about half what it says on the bottle with just water(no nutes) and it helped a bunch, I had alot more yellow though so you might want to do less, or just do a spray. Hope it helps

hi can anyone help with my plant please? its a hbd auto from short stuff, growing hydro, using Advanced Nutrients (3 spart one), did have a problem with ph being way too high (ran out of testing stuff, was about 7 - 8 but sorted that now. think its nitrogen it needs but could this have just been due to the ph bein off? dont wanna add anythin incase i make it worse.
what ya think? cheers

anybody? please

i am still a beginer so you should still get more advice but i think thats chemical/nute burn. I think you might be using to many nutes. Depending on the soil you use (happy frog and such) there could be a lot on nutes already in your soil so when you add them to the water there is to much and it builds up salts and doesn't let the plant use the stuff anyway. Also the guy thats been teachin me said that you should usually use less nutes than what the bottle says. You might want to try leeching your plant. Hope it helps.

ok cheers buddy

vino said:

hi can anyone help with my plant please? its a hbd auto from short stuff, growing hydro, using Advanced Nutrients (3 spart one), did have a problem with ph being way too high (ran out of testing stuff, was about 7 - 8 but sorted that now. think its nitrogen it needs but could this have just been due to the ph bein off? dont wanna add anythin incase i make it worse.
what ya think? cheers
View attachment 1057003

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hey man whats up. if youve gotten the ph issue straight just wait a few days to see if it gets better before you add or do something else that may affect it in a negative way. to me it looks like the new leaves coming out look ok. give it some time, the burn it not going to revert back to green ever, once its burned it is burned. so the new growth is what you want to see coming out looking healthy. so dont be in a rush to fix it "some more". one thing at a time, see if the ph issue was your only issue.


PEACE!!!
-ZEN-