Yellowing new growth, newer leaves! PLEASE HELP!!

hey guys,

as you can see on the pics something is causing yellowing between the veins of the new growth and newer leaves. i have searched endlessly to try and solve it myself, but no def ive read up on describes what i have. anyone have any clue what the hell this is?

Check for changing/fluctuating ph in your tap water due to heavy rain etc.

we havnt had heavy rain here in a while, as for PH. my tap water is 7.5, i just bought a proper ph tester today, will change water down to 6.5-6.8 over a week or so.

I had something similar, but it started right from seed.

I never did get it fixed. I think it was just genetics. She's in week three of flower. BY FAR the smallest and slowest flower producer, but I just don't have the heart to get rid of her.

The guy at the shop suggested I spray a light nutrient solution on the leaves. You might give that a shot.

Can be a common problem, sometimes if lucky they just grow out of it, sometimes the plant isnt uptaking enough nutes if soil starts to dry around roots. Seems common when people switch from the grow to the bloom and add too much bloom or P/K.

Thin stragly leaves and yellowing can be attributed to iron and manganese def but even then pH considerations and temps can inhibit these two nutes. When they green up you know your good. Sometimes just the start of flowering can cause these problems as the plant adjusts its nute needs.

At this stage i wouldnt panic to much but keep an eye on it for future considerations. Sorry i cannot hit the nail on the head for you a bit more.

Dude, check it out
https://www.rollitup.org/grow-journals/483276-first-grow-using-cfls.html

There is a plant problem solver in one of the posts, may help... Good luck...
Maybe Iron deficiency?

Thanks for the help guys, im pre sure its a PH issue now. i got a reading of the water from my outside tap that i use to water them and it was 7.81, wayyyy too alkaline. anyway ive measured that 5 drops of vinegar to a litre drops the PH by 1. so i add 6 per L and it PH's at around 6.5-6.6 its only been 1 day tho. ill post more pics in a week! i just topped 4 of them, to see how it goes. and if all goes well ill do the same to the other 4. anyways im out

Catch some rain water, pretty PH neutral plus you get all the benefits of the natural nitrogen and other nutrients in rainwater

Dont Fear The Reefer said:

Catch some rain water, pretty PH neutral plus you get all the benefits of the natural nitrogen and other nutrients in rainwater

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Rain water is not Ph neutral, it may have started of at pH7 miles up in the cloud but at that point it started to suck the hydrogen molocules from the air causing it to become slightly acid nearer 6.5. Pure water is a non electrical conducting vacum.

yeah perfect!

The science behind weed, water and nutrients is a blag but leads to being able to keep it simple allbeit in the long run.

yeh im hoping this grow will give me some cash i can invest in a rainwater tank. that'd REAAAAAAAALLY HELP!!! ..mmm beef steak. mad munchies right now im going to maccas, ciao. still no1 with the yellowing? im told i may have pathogens.. most likely botrytis. anywhore thanks for all the advice guys! maccas time

5 gal. buckets work fine for rain, no need to spend money.....
Go with the rain water, clean and free fertilizer/nutrients

The only problem with rain water is that it lacks cal/mag. Rain water is for the most pretty pure but tap water has generally filtered through rocks and sediments containing amongst others cal/mag.

Unless your ferts are providing all the cal/mag, rainwater as with reverse osmosis water will need the cal/mag adding to it. Some rely on the heavy amounts of lime in their soil to provide the cal/mag and some add supplements.

I cannot get the variables right for you but can only hope that eventually each variable and nutrient is there in the right quantities. This is the kicker about pH, most ferts contain acid and alkaline elements and some of these are not available till the microherd or plant roots assimilate them. Our organic ferts have very misleading pH's because only after they have been added to the soil and broken down do they finally release their nutrient value and change the pH significantly.

I like my water to be slightly alkaline, that way it helps stop my soil becoming acidic and means not having to pH ferts. People say PH but it is never that simple, youd be amazed to learn that Nitrogen comes in two forms, one acidic and one alkaline, nitrate and ammoniacal. Phosphorous and Potassium are very similar too in that one is acidic and one is alkaline. PK13/14 is called so because the Phosphorous and Pottassium are meant to balance each other out in some form leaving a more neutral solution. Even this is not straight forward unfortunatly. Dont get too hung up on PH, if you find you reach acidic soil levels either stop adding way too much ferts or powdered/fine grade lime in the soil.

I think you will find that you are totally wrong about rain water if you do a little research. You cant beat it as a source for water.

Dont Fear The Reefer said:

I think you will find that you are totally wrong about rain water if you do a little research. You cant beat it as a source for water.

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I never said it wasn't great for source water but it fell from the sky and sucked in very little on the way down except a few acidic compounds which is why rainwater is typically 6.5 or there abouts and the majority of plants have adapted to this pH range over the ages.

Sorry but i am right about rainwater and research was for many months, the Docs got a sticky called 'Water the Essential ingredient' on one of the top forums but this was the base for my research before i started hitting university papers and science publications.

Pure water dose not conduct electricity and is a vacum, its pH will always swing due to the salvation etc etc of H2O into H3O etc etc. Only when it contains impurities such as cal/mag, potassium, etc etc will it conduct electricity. Pure water is used in the processing of electricity and nuclear power for these reasons. Surely i do not need to research this again but yes if you have adequate cal/mag in the soil or ferts then you need worry little about it being in the water, well unless you grow in coco and then yoiu understand the implications of too 'PURE' of a water.

Outside you would expect the large volume of soil in your garden or forest to supply the cal/mag etc without having to worry too much but indoors in your little 12inch container pot these variables become all the more restricted.

Oh and bringing rain water in from outside can be disatorous if you allow pathogens and such to build to certain levels, only then would you hope the good guys in your soil can eliminate the bad guys you might harbour outside and bring in. Use rainwater by all means but lets not hide the variables.

my my what a worry wart we are, what about the chlorine, heavy metals, pesticides, drugs in your tap water? What if the sky falls? What if.....if

Dont Fear The Reefer said:

what about the chlorine, heavy metals, pesticides, drugs in your tap water?

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All within safe levels not to affect humans or plants and hence what the municipal water systems around the world were built on, plants like a little chlorine and flouride, not essential nutrients but usefull none the less. Who said chlorine, research and testing shows it has negliable effect on grows, hell it dont even effect my fragile seedling.

Its not worry its facts, some cant and some can handle them, obviously myth land is our next stop!

Yes mother nature invented municipal water systems so she could grow pmats... Get real man, rerad the wartnings they send with the water bills... They dobt even test for pesticides and drugs. Nobody knows WTF is in the water.

Hang in there though. If you start gaining an unusual amount of weight you will know it is from all those heavy metals you drank.