Doctor Cannabis you out there?

POLARIS01

Active Member
doc, these pics are from 4 diff plants. can you tell me what is up? how can you tell from a nute burn, ph problem , or a deficienies? they kinda look all the same to me. I'm trying to learn all i can so i can help other people.
 

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MEANGREEN69

Well-Known Member
WOW..do u guys just make shit up..whats up with that?..the 1st pic looks like nute burn, i know u said u havent feed her but i whould check if the soil has any nutes in it. but i could be wrong ..the others looks like Phosphorus and some Potassium deficiency..are they flowering?..also check this out has tons of info on deficencys:http://www.icmag.com/ic/showthread.php?t=11688....got it from here:https://www.rollitup.org/marijuana-plant-problems/38772-guide-diagnosing-plant-problems.html ...hope i helped...meangreen.
 

thesmokering

Well-Known Member
The first one could be a K deficiency, but looks severe might be caused by excess P I would check the medium then if you haven't added nuts. The other two look like burn, not knowing anything else. The third one could be mutated or curled, can't tell from pic. Remember its better too go easy on the nuts and just give the plants when they tell you they need.
 

Doctor Cannabis

Well-Known Member
Sorry I couldn't check this out sooner, had some internet problem.

1 and 3 are nute burn. 1 has dark green leaves -> N toxicity -> eventually nute burn. 3 is also a nute burn, but is also affected by cold.

2 and 4 may be P defs IF the plants are in flowering. If not, then it's also a nute burn. It's easy to figure out. If you flush, and more leaves start turning like this, it's the deficiency, if the problem stops, it's a nute burn.
 

IAm5toned

Well-Known Member
is the soil to hot? (hot as in too much fertilizers in the soil)
did we use chemical insecticides on the outdoor plants?
(i say it looks like nute burn)
 

POLARIS01

Active Member
Sorry I couldn't check this out sooner, had some internet problem.

1 and 3 are nute burn. 1 has dark green leaves -> N toxicity -> eventually nute burn. 3 is also a nute burn, but is also affected by cold.

2 and 4 may be P defs IF the plants are in flowering. If not, then it's also a nute burn. It's easy to figure out. If you flush, and more leaves start turning like this, it's the deficiency, if the problem stops, it's a nute burn.
are you sure pic 1 is nute burn? i have not added any nutes yet, i leaning on a P def.
 

Doctor Cannabis

Well-Known Member
That's surely not P def. The edges should have shown some significant brown by now. Plus, the leaves look very dark green, a clear indication of too much N. Are you useing miracle grow soil or some sort of time release nutes?
 

POLARIS01

Active Member
That's surely not P def. The edges should have shown some significant brown by now. Plus, the leaves look very dark green, a clear indication of too much N. Are you useing miracle grow soil or some sort of time release nutes?
the tips are brown , foxfarm soil
 

MEANGREEN69

Well-Known Member
That's surely not P def. The edges should have shown some significant brown by now. Plus, the leaves look very dark green, a clear indication of too much N. Are you useing miracle grow soil or some sort of time release nutes?
https://www.rollitup.org/attachments/marijuana-plant-problems/555142d1253573664-doctor-cannabis-you-out-there-damn-20004.jpg

not trying to be a ass but looks alot like P def to me, the plants are out side, there starting to bloom, useing lot of P..i dont know mybe im wrong just my opinion..again check this out:http://www.icmag.com/ic/showthread.php?t=11688. under: what a phosphorus deficiency looks like in flowering...does it look like that leaf???
 

Doctor Cannabis

Well-Known Member
There are still certain differences between your leaf and the ones in the pics.

Still, it's better to be open to suggestion. If you think that it's P def and say that the plant had absolutely no nutes added, then it's stupid to argue that it's nute burn, although that would make this the strangest looking P def I've ever seen. The tips arn't curling, there's a considerable amount of yellow and the more vascular spaces seem to survive a bit longer. Plus, a plant starts using more P and K only when buds actually start appearing and not at the very beginning of flowering.

Yet, I prefer to be wrong and be the one that indirectly kills your plant. So add some nutes and see if in 2-4 days the problem stops, slows down or gets worse.
 
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