@MagooYFZ, Using organic ingredients means then that you also need to have a somewhat living soil, with bacteria. So you can't use straight tap water for instance, because it would be chlorinated and kill bacteria. If it's been allowed to sit at room temperature for around 24 hours though it should be ok. To help increase bacterial activity in the soil you could add some worm castings or a worm castings tea.
As for what's deficient, it looks like they're missing Zinc. Possibly the start of phosphorus deficiency as well considering the reddish tints in some of the veins / stems.
The soil could be deficient, or the nutrients could be locked out due to PH not being at the levels it should be.
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