Lower leaves yellowing, what is required?

[kraz]

Hello again!

I have problems - again - with my first grow. 5 weeks into veg, the lower leaves of the plant have started going yellow. I did not use nutes, and read that this is basically a full NPK deficiency. So I applied some, namely B'cuzz aarde (two bottles, one A and one B to be combined and diluted in water. 21-14-28) . 5 ml of each per litre of water, watered, leaves still yellow. HPS light, plenty of ventilation, good temperature, and pH at approx 7. Plants currently on 18/6.

Any ideas? Should I up the nutes over the required dosage? Picture added for reference ;]

Thanks in advance!
I just hope the next grow will go over better :rolleyes:

[420somewhere]

That plant looks fine! As time goes along, those bottom leaves are going to yellow and fall off. Just introduce the ferts slowly. 1/4 strength every other watering and sloooowly increase as she grooowws!

[stinkyattic]

The yellow leaves aren't going to change back to green. They're too far gone and will just drop.

[Weed4Life]

Mine do that all the time. Ha haha. People here always say to introduce the plant to the nutes by giving it 1/4 strength of what is recommended on the bottle.

[kraz]

Okay then, thanks a lot! :)