nutrient deficiency or toxicity? ,with pictures and details! please help

rinny · Feb 10, 2014

i have an outdoors female plant which is approximately 2 and half months old growing in australia .she has begun to produce pistils throughout the plants nodes within the last two weeks. i have been feeding her THRIVE fertiliser with an NPK of 22 :5 :8.8 every week with slightly less than the recommended dose and the occasional organic worm castings since she was 4 weeks old .last week i gave her first weak dosage of bloom booster fertiliser as she was beginning to flower , she was going beautifully with very fast and healthy growth until a few days ago . At first i noticed that the new growth throughout the plant started to become very pale green (almost yellow) starting from the centre of the leaves and were much thinner than usual .
(possibly a sulphur deficiency?).

.this most not noticeable in the mornings but towards the end of the day the leaves recover slightly and appear like this

with still a slight discolouration in the very centre of the new growth? i would like to know what it is before it gets worse.
( should i be worried about this , cause its killing me!??!)

also i have noticed abit of damage to some older leaves with some crisy edges and odd spots throughout the leaves

is this a nutrient deficiency or burn??

PLEASE HELP I WOULD APPRECIATE ANY OPINIONS AND FEED BACK !

BenFranklin · Feb 10, 2014

Burn. IMO. The leaves look VERY green. Might be ph is off a bit. But some strains will just "do that" ie: get faded looking a little in the center as flowering kicks in.

Other folks will know better than I more than likely.

rinny · Feb 10, 2014

BenFranklin said:
Burn. IMO. The leaves look VERY green. Might be ph is off a bit. But some strains will just "do that" ie: get faded looking a little in the center as flowering kicks in.

Other folks will know better than I more than likely.

thanks for your insight benfranklin! a little weight off my shoulders

rinny · Feb 10, 2014

any more opinions appreciated !

tikitoker · Feb 10, 2014

rinny said:
any more opinions appreciated !

the plant is fine. some do that when the pH is a tad higher than its preference. Make sure every time you water to have 10-20% runoff and pH adjust feed water to 6.5. I would advise you to add 2" layer of castings/compost as a top dress and water that in. Nxt time you grow, look for chelated nutrients.

rinny · Feb 10, 2014

tikitoker said:
the plant is fine. some do that when the pH is a tad higher than its preference. Make sure every time you water to have 10-20% runoff and pH adjust feed water to 6.5. I would advise you to add 2" layer of castings/compost as a top dress and water that in. Nxt time you grow, look for chelated nutrients.

thanks homie! what is your opinion on using house hold things such a coffee grinds or vinegar mixed with water to lower/raise the ph of the soil??

lilroach · Feb 10, 2014

https://www.rollitup.org/marijuana-plant-problems/488004-guide-nutrient-deficiency-toxicity.html

tikitoker · Feb 10, 2014

rinny said:
thanks homie! what is your opinion on using house hold things such a coffee grinds or vinegar mixed with water to lower/raise the ph of the soil??

When it come to anything organic they can have an influence on pH but stability comes from maintaining the microbial loop. Yes coffee grounds are acidic but if your soil is fungal dominant then the grounds will make acidity worse. Feed all microbes to maintain high diversity.

rinny · Feb 10, 2014

tikitoker said:
When it come to anything organic they can have an influence on pH but stability comes from maintaining the microbial loop. Yes coffee grounds are acidic but if your soil is fungal dominant then the grounds will make acidity worse. Feed all microbes to maintain high diversity.

thanks for the reply! I'm new to growing and I'm not too sure on the whole PH concept ? so in general coffee would be a bad idea too lower the ph as it would not be accurate enough? sorry for the lack of understanding!

Deuce&Reg · Feb 10, 2014

rinny said:
thanks for the reply! I'm new to growing and I'm not too sure on the whole PH concept ? so in general coffee would be a bad idea too lower the ph as it would not be accurate enough? sorry for the lack of understanding!

dolomite will help stabilize the ph of soil. its better to mix in with the soil before hand but can be top dressed and watered in as well.

Deuce&Reg · Feb 10, 2014

also IMO I think your last pic might've been a splash from when you watered/feed. if that's the only spot where you see that happening. they look good tho.

SnaFuu · Feb 10, 2014

Don't know what these guys are tellin ya but that plant looks hungry as eff!

As soon as flowering kicks in there's a much larger demand on nutrients and your plant is a decent size. It's gonna take a fair bit of food. As in, a moderate feeding every 3-4 days with a light watering inbetween. If you've been doing this, and you're sure it's been given enough food, then your problem lies with the ph. Correct your soil ph so your starving plant can uptake what it needs!!

definitely a deficiency. IMO.

good luck

tikitoker · Feb 10, 2014

rinny said:
thanks for the reply! I'm new to growing and I'm not too sure on the whole PH concept ? so in general coffee would be a bad idea too lower the ph as it would not be accurate enough? sorry for the lack of understanding!

Coffee is a source of nitrogen and although acidic, has to be broken down first by microbes before the plant benefits. If you dont need nitrogen dont add coffee grounds. Citric acid, vinegar, sulfates, kelp and organic acids to pH down.

DCobeen · Feb 10, 2014

rinny said:
i have an outdoors female plant which is approximately 2 and half months old growing in australia .she has begun to produce pistils throughout the plants nodes within the last two weeks. i have been feeding her THRIVE fertiliser with an NPK of 22 :5 :8.8 every week with slightly less than the recommended dose and the occasional organic worm castings since she was 4 weeks old .last week i gave her first weak dosage of bloom booster fertiliser as she was beginning to flower , she was going beautifully with very fast and healthy growth until a few days ago . At first i noticed that the new growth throughout the plant started to become very pale green (almost yellow) starting from the centre of the leaves and were much thinner than usual .
(possibly a sulphur deficiency?).View attachment 2990063.this most not noticeable in the mornings but towards the end of the day the leaves recover slightly and appear like thisView attachment 2990066 View attachment 2990068 with still a slight discolouration in the very centre of the new growth? i would like to know what it is before it gets worse.
( should i be worried about this , cause its killing me!??!)

also i have noticed abit of damage to some older leaves with some crisy edges and odd spots throughout the leaves View attachment 2990074 View attachment 2990075 View attachment 2990077
is this a nutrient deficiency or burn??

PLEASE HELP I WOULD APPRECIATE ANY OPINIONS AND FEED BACK !

im not gonna read all the repy's that is ph burn from big swings in ph usually from low to high. i know jsut went threw it.

rinny · Feb 10, 2014

DCobeen said:
im not gonna read all the repy's that is ph burn from big swings in ph usually from low to high. i know jsut went threw it.

thanks for your insight! how did you over come this problem of ph DCobeen ?any suggestions?

rinny · Feb 10, 2014

SnaFuu said:
Don't know what these guys are tellin ya but that plant looks hungry as eff!

As soon as flowering kicks in there's a much larger demand on nutrients and your plant is a decent size. It's gonna take a fair bit of food. As in, a moderate feeding every 3-4 days with a light watering inbetween. If you've been doing this, and you're sure it's been given enough food, then your problem lies with the ph. Correct your soil ph so your starving plant can uptake what it needs!!

definitely a deficiency. IMO.

good luck

i have been feeding her efficiently throughout her life , although i do see your point in the higher demand on nutrients during flowering ! so I'm guessing that it is something to do with acidic soil ?
so from what i have gathered my best option is to stabilise the ph with coffee grounds as it needs to have a less acidic soil and could do with some nitrogen swell?

SnaFuu · Feb 10, 2014

Uhhh not sure about that. Damn you're really set on using some coffee grounds lol.

If it was me i'd flush with lots of water at 6.5 until your soil is ph'd proper. Then wait a day or two and start feeding her nutes again. Ph to 6.5 everytime.

DCobeen · Feb 10, 2014

rinny said:
thanks for your insight! how did you over come this problem of ph DCobeen ?any suggestions?

get a good ph tester and test it and adjust before you water it. you want about 6.5 ph when water and fert go into plant the soil will adjust slower which is okay. but if your runnoff is way low or high like 4 or 8 then water a little extra like 2x the normal to help it. a cheap ph tester is 0091A on ebay like $13

rinny · Feb 10, 2014

DCobeen said:
get a good ph tester and test it and adjust before you water it. you want about 6.5 ph when water and fert go into plant the soil will adjust slower which is okay. but if your runnoff is way low or high like 4 or 8 then water a little extra like 2x the normal to help it. a cheap ph tester is 0091A on ebay like $13

okay so my best interest is to stabilise the ph between 6-7 and then monitor the growth :leaf:

?

DCobeen · Feb 10, 2014

rinny said:
okay so my best interest is to stabilise the ph between 6-7 and then monitor the growth ?

yes they are real young so dont adjsut anything fast they can handle it. your next watering make sure the chlorine is out of water no nutes test your water. if needs adjusting go to local pet store buy ph up/down kit or buy online. dont waste time with the other stuff like vinegar ect. they dont last long.

nutrient deficiency or toxicity? ,with pictures and details! please help

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