New bud growth is yellow!

Hello all. Sorry to leap in with a question, but I have searched all over, but keep getting different answers.

I have a couple of plants 2 weeks into veg stage, growing in compost. They started off fine, but pretty soon after I introduced full strength nutes (Canna veg), the started to develop yellow leaves as new growth, exactly like the picture below.

Now after searching, it seemed to me to be zinc/iron deficiency as we have very hard water. I haven't tested the ph yet, but I assume it's high and I have nute lock as a result. I called up our local grow shop, and he said it can't be high ph as I was growing in soil so this shouldn't be an issue. He said it would be due to feeding it full strength nutes, and that the compost should have sufficient nutes in it for the veg stage.

I am skeptical only because the picture below is a zinc def plant, and my plant is exactly like that. Also, I thought nute burn was different in appearance. Can too much nutes create nute lock out maybe? Any thoughts would be most welcome.

Thanks.
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potasium problem, caused by the nutes you added as there was already enough stuff for the plants in the compost. youll have to flush the plants. or at least thats what i would do. that compost is very "hot" so dont add any nutes for a while. probably the manure in the soil and nutes has caused a k overdose locking out mg, zinc etc
flush and give them time to recover. next time though dont use compost.
lu

also you need to be testing the ph of the water and the ph of the soil. get yourself a ph meter its one of the most important things in growing.
lu

Nutrient issue or over watering, is the light to close?

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are u checking your ph? i went throught the same thing awhile ago after vegging for over 2 months in peat . thought it was zinc deficiency but the peat had begun to break down and lowered the soil ph down to about 4.8 despite phing everything that went into it, grated in some lime in the top layer and 2weeks to a month later picture perfect growth and runoff and soil at a consistent 6.2 (lime takes some time, use the super fine stuff and work it into the soil) IF you choose to try that, lime is pretty neutral its hard to over do it

just a thought

edit, guilty of not fully reading post, check that ph son over nuting causes burning
i dont know your grow store but the guys around here dont know squat,

Feirefiz said:

are u checking your ph? i went throught the same thing awhile ago after vegging for over 2 months in peat . thought it was zinc deficiency but the peat had begun to break down and lowered the soil ph down to about 4.8 despite phing everything that went into it, grated in some lime in the top layer and 2weeks to a month later picture perfect growth and runoff and soil at a consistent 6.2 (lime takes some time, use the super fine stuff and work it into the soil) IF you choose to try that, lime is pretty neutral its hard to over do it

just a thought

edit, guilty of not fully reading post, check that ph son over nuting causes burning
i dont know your grow store but the guys around here dont know squat,

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why bad mouth everyone at least they are trying to help and not talking shit like you. Dumbass

Im quite sure the guys around here was in reference to the workers at his local grow store... not riu...

woodsmaneh! said:

why bad mouth everyone at least they are trying to help and not talking shit like you. Dumbass

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Thanks everyone. I guess I need a ph tester to start eliminating things despite what the grow shop said about soil always stabalising ph. So to clear that up....does spoil/compost/peat stabalise the ph in your opinions or just change it in some unpredictable way? I would be amazed if my ph is low. The limescale build up round our way is terrible. Kettles last no more than a year, and shower heads the same.

The confusing thing is that symptoms for overfeeding are so similar to other problems caused by ph lock out. Anyway, in the meantime, I've flushed the sick plant with loads of clean water. I guess it should be seen as no coincidence that the yellow leaves appeared after I introduced the nutes.

over feeding and ph lockout are ery similar because they can both lock out other nutrients, if your ph is high or low then certain nutients cannot be absorbed by the plant. also if you give a plant too much of one nutrient it can lockout other nutients. as long as you feed as required levels and ph your water to 6.5 then you should be ok. dont listen to people in grow shops. the stuff on here (riu) ive heard been told to people by growshops is very annoying, they talk total shite a lot of them. of course you can get a high ph if you have been watering with a high ph level of water. soil does not correct the ph because if it did there would be no such thing a ph lockout in soil. while plants are growing they can make the soil acidic which is why its always a good idea to check run off. the plants should be ok now you have flushed, always make sure if you are using tap water to leave it standing for 24 hours with lid off to let the chlorine disperse.
lu

another thing if you are using tap water then it probably has a high ph and so you will need to level it down to 6.5 with some ph down. personally id say because your water is so hard you are locking out magnesium. after the flushing if things dont get any better, which they wont if you flushed again with high ph water you will have to lower the ph of water and maybe then add some epsom salts. if you want to do that you need to mix 1 teaspoon of water with a cupfull of boiling water, mix up and then pour that into a gallon of water. let me know how things go anyway.
lu

Looks like too many nutes to me.

luciferateme said:

another thing if you are using tap water then it probably has a high ph and so you will need to level it down to 6.5 with some ph down. personally id say because your water is so hard you are locking out magnesium. after the flushing if things don't get any better, which they wont if you flushed again with high ph water you will have to lower the ph of water and maybe then add some epsom salts. if you want to do that you need to mix 1 teaspoon of water with a cupfull of boiling water, mix up and then pour that into a gallon of water. let me know how things go anyway.
lu

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Thanks for your continued help. I've got a ph test kit now - just a liquid tester to give an idea what's happening. Anyway, the tap water seems very high at around 8.5 or so (definite blue hue to it). But the run off seems normal at around 6.5 so the compost does seem to be doing it's job to a degree. I've stopped the nutes and flushed, but it seems the same with no improvement to the new growth. I'm going to get some ph down, just to normalize the water going in. Is that worth a try you think?

you should be watering the plants with phd water of 6.5 for soil. do that and things should improve. it may take a couple of days though to see improvements. also dont forget to let the tap WATER TO STAND OVERNIGHT to let the chlorine dissipate. that could damage the plants aswell.
after the flush just let it the soil dry and then introduce the nutes at a quarter dose. you dont want to stress the plants again after the flush. im sure everything will be fine so try not to worry too much.
also if you end up using the same soil again only give nutes when the plant lets you know that they want it. under nuting is much easier to fix that over nuting,
good luck
lu

Thanks very much, that's the plan then. Instead of ordering some ph down, I know I can do it with vinigar. Is there a rough guide for how much vinigar to add per gallon to bring the ph down by 1?

You can get PH down at pet stores that sell aquariums and fish. It's the same thing.

That plant is fucked. Lucifer hit it, it's your tap water, ph is off the charts. This is a zinc or boron problem but the chlorosis is too severe that this plant is terminal.

In the words of Bones, "she's dead Jim."