Yellowing tops, wk 2-3 flower.

Hey guys I came up woth this problem and I want to double check if its really sulfor deficiancy or is it something else?
Grow is indoors - living soil - just water amending every month - coots recipe - temps n19-20 d27-28 - everything is diled in just weird few plants does that strain plasma fuel/jet fuel from exotics. Im just about to spray with epsom salt and feed water with also epsom salt what uour opinion? Thanks

What color are the under leafs?
Check the soil’s PH.

What are you using for a light and settings?

Magnesium deficiency affects old leaves and sulfur deficiency affects leaves all over. I don't understand what epsom salt is supposed to do.

Mars hydro 3000 its 300w for my 3 1mx1m tent
lights where too close on flio but I rased them properly about 24” away 100% now but more yellowing came out so lights are not the case I blv.

DeadHeadX said:

What are you using for a light and settings?

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HydroKid239 said:

What color are the under leafs?
Check the soil’s PH.

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yes Ill do that Ill check when Ill get back home as I never checked ph in my soil for a year now. maybe thats ehy its not upyaking any micronutrients

Lou66 said:

Magnesium deficiency affects old leaves and sulfur deficiency affects leaves all over. I don't understand what epsom salt is supposed to do.

A Dichotomous Key for Understanding Nutrient Deficiencies

One of the most important skills any grower can have is the ability to visually identify a deficiency or issue with their crop. Proper scouting and early identification of nutrient or IPM issues is critical to staying on target with your harvest goals. This can be confusing for newer growers and...

www.kisorganics.com

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Epsom salt I was using to correct sulfur deficiancy but now its clear by your link that is not a sulfor but more likely Iron deficiancy,

what I think Ill do now is use “canna bio flower” organic nutrients so that prob will give me some micro nutrients to my planta as there should be potassium in “canna bio” so that might help and also gn spray with epsom salt just to make sure

I'm going with the soil ph being the problem. I use humic acid to help keep soil ph balanced...it works so well I don't even own a ph pen anymore. I use RAW humic acid starting at week 3 of grow and every week after...during flower I add their kelp too. It won't matter what nute you put in the soil if ph is off it will just add to the problem.....try it and let me know how it worked for you!

driver77 said:

I'm going with the soil ph being the problem. I use humic acid to help keep soil ph balanced...it works so well I don't even own a ph pen anymore. I use RAW humic acid starting at week 3 of grow and every week after...during flower I add their kelp too. It won't matter what nute you put in the soil if ph is off it will just add to the problem.....try it and let me know how it worked for you!

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ok good to know how much of humic acid do you use? as Im just about to buy some for my living soil, Ill just get raw humic acids in this case

I use the RAW brand humic acid at 1/8 to 1/4 tsp/gal and I add their kelp at around the same dose a bit more during flower. Once/week but more often is fine too..it won't burn....It will make all your ph problems go away though...forever!