Hey guys im in week 3 of flower now and lower leaves are turning yellow.
Nitrogen deficit?
What can i do to help it?
Im using BioBizz Grow Fishmix Bloom and top Max with the Plan and already added some more Grow and Fishmix yesterday
Ill add a picture
Thxx
Cal-mag or maybe ph issues
Please be careful with instructions you give to others if you are not sure you really know the cause @Paddy1
You certainly donāt want anyone telling you crap, do you?
it is a nitrogen deficiency!
The reason for this is probably that the soil is too acidic, because from the picture I rule out overwatering.
Check the pH value and adjust it to 6.0 to 6.5 in your soil.
Iām sorry, but adding Cal/Mag is complete nonsense!
good luck @Bennnn 
Worked for me!
@Rex_Kramer
Can i have the master grow book your using?
Because it could also be a manganese deficiency.
Telling someone what they suggest is "nonsense " is just egotistical and not productive advice at all.
Sorry @Papakat420
If there was a manganese deficiency, the upper part of the plant would be affected and not the āoldā fan leaves.
And I suspect thatās what it says in the books you read, my dear friend.
Maybeā¦but i still stand by what i said.
If im wrong ill admit it.
But ill never disrespect anybody by saying their suggestion or advice is ā¦howd you say it " nonsense "
It still falls bach to a PH issue.
Okay @Papakat420
Please will you take my excuse for my knee-jerk reaction,
sometimes for me, it feels like, every second advice is about Cal/Mag without a diagnose or further information and inbetween that makes my toe nails curl upš¤·š¼āāļø
And i can still not understand how Calmag could help in this case to solve the problem!?
Calcium and magnesium are required for photosynthesis plus it carries nitrogen. Between those 3 it should cover a fair amount of deficiencies.
Iām a fan of removing the cause,
but not the symptom 
Its progressing and i dont have a pen on me right now and only had a test with powder which came out at around 6 but you guys prob now how accurate they areā¦
Eitherway thanks for the opinions!!! Its much apperciated.
Could it be too hot? Its now a Bit lower (23-25 C) than before because it got to (28 C) from time to time
Micronutrient issues like calcium, magnesium, manganese usually present first towards the top of the plant rather than down from the bottom up like marcronutrients like nitrogen. You achieved tip burn at some point which says it probably isnāt a lack of nutrients overall but more likely an issue with uptake which could mean you are in a nutrient lockout type of situation most likely due to ph imbalance. I would suggest flushing with ph balanced water and starting back from blank with the ph and nutrients kind of like a reset
How do you recognize a nitrogen deficiency?
Initially, the older leaves turn yellow-green. This discoloration spreads from the inside to the outside of the leaf.
The yellowing extends to the leaf base and veins.
Eventually the plant stops growing and the leaves fall off.
The stems of the plant become purple or reddish.
What is the (possible) cause?
Too much potassium, zinc and manganese in the soil.
Too much chloride in the soil.
There is too little nitrogen in the soil.
Too high pH in the root environment, which means nitrogen cannot be absorbed properly.
A non-functioning root system of the plant. This can happen if there is damage, disease or the soil temperature is too low.
Nitrogen nitrate is easily soluble. Therefore it can be easily washed out of the soil.
Can you rule out any of the causes mentioned based on your watering or fertilizing behavior?
or confirm, @Bennnn ?
Im using distilled water since the start of this first grow because I didnāt trust the tap water which actually now that I checked it has a ābetterā ph between 6-7 than the other one which is around 5
I never had the chance to test it before and Iām still waiting for the pen so I have a test kit with powder right now
Could it also be missing calcium to neutralize the ph?
I only used Organic Fertilizer from Bio Bizz and bought another one and used good amounts the last days
Temps are rather too high than too low so around 24-27 Celsius because of the light and the small size of the tent
I used tap water today and Iām going to get PH+ from BioBizz or is there any better way?
Hi @Bennnn
Distilled water basically has a neutral pH value of around 7. However, this pH value is very unstable because as soon as distilled water comes into contact with the ambient air, it can react with the carbon dioxide to form natural carbonic acid and the pH value drops to around 5.
Distilled water is completely free of lime and is therefore great for plants.
But wait: it doesnāt contain any other minerals.
If you want to water with distilled water, you must definitely add additives in the form of fertilizer to the water.
Organic fertilizers in particular require microorganisms to be able to break down the nutrients for the plant and thus make them usable.
Especially when you are on the organic fertilizer track, errors arise from the interaction of many factors.
Functioning microorganisms 
are particularly important in order to be able to break down the nutrients.
For this reason, purchasing additional products that prepare the plant soil positively is usually unavoidable.
This process is possible naturally, keyword: living soil.
The fertilizer industry offers a wide range of additives that are intended to take on this preparation task.
Together with the buffering effect of the soil, this cultivation method also delivers great results and fertilizer errors do not have the same impact as when using mineral fertilizers.
But if an imbalance has arisen, it is difficult and slow to bring about a change because the nutrients first have to be broken down and enriched with the āsuitableā microorganisms first, and only after some time in interaction with the buffering effect of the earth Time shows success or failure.
Foliar fertilization with basic fertilizer could provide a quick remedy, because if there is already an imbalance in the microorganisms, NPK absorption is particularly difficult.
This proportion is very low in biological fertilizers and must first be broken down to be available.
Your girls are in the early blooming phase,
I donāt know the manufacturerās fertilization schedule, but you definitely need a little more NPK in this phase than you have received so far, so I would add it to the normal fertilizer dosage.
@Paddy1 ; @Demonrage75
Adding Cal/Mag to the irrigation water can also help to improve the soil environment.
However, it cannot be seen as the sole panacea, because until it is opened up and works, we are probably running out of timeā¦
They said they were in flowering not veg, so same thing you said to paddy I can say to you. Because research has shown 6.5-6.8 during flowering to pick up its essential nutrients which is different then veg.
Iām pullin your leg about the paddy thing, but 6.0 may be locking out nutrients if itās purely soil, so he may want to stay in a general range of 6.2-6.8 to ensure lockout doesnāt happen.
I do see calmag deficiencies, the intervenial chlorides would be an indicator of calmag deficiency, spray a calmag and water solution (like 5ml per gallon for bushdoctor calmag(itās what I use)) so adding some calmag at this point wouldnāt hurt and wouldnāt majorly affect a nitrogen issue either way (toxicity or deficiency) so itās not a bad shot in the dark to recommend calmag as it is more essential during flowering than veg.
But 100% agree with you before anything they need to get their pH figured out before adding anything else to the treatment because the pH is so crucial.
But if he finds that the pH is somehow within range (I doubt it just like u do lol) then adding calmag wouldnāt be a bad idea as Iāve had similar things happen to me in previous grows where certain plants wanted calmag more than others and were heavy feeders.
Just remember none of us are physically there and we donāt have access to an exact chart and there are unknown variables at play with the grow. So we can only try to help with the knowledge we know and the information that can be given.
Plus he never said he added any calmag to his mix so he could be deficient. Just saying.
Actuslly your precisely wrong. It starts on the older and lower growthš please double check your information before trying to prove people wrong. Literally one search was enough to completely tell you are mistaken. Just recommending to double check your information before posting. The newer leaves are more likely to be affected by a deficiency like iron or sulfur. Please double check your research.
