Leaves starting to yellow

[ITheNorth]

Any idea what type of deficiency this may be?
Feminized "Blue Dream" and "Crown Royal" both started to yellow yesterday. Growing in organic soil, mycorrhizae and earth worm castings. Yesterday fed them epsom salt (1T./gal), seaweed tea(20ml/5L.) and Molasses(1T./gal)
Could they be needing some more epsom salt? I'm thinking a Mg deficiency.

 

[NewToTHC]

Could be age on the older leaves at the bottom, but appears to be a slight nitrogen deficiency or overall the plant is starting to starve, maybe up your nutes a bit.

 

[ITheNorth]

Could be age on the older leaves at the bottom, but appears to be a slight nitrogen deficiency or overall the plant is starting to starve, maybe up your nutes a bit.

Any idea what type of deficiency this may be?
Feminized "Blue Dream" and "Crown Royal" both started to yellow yesterday. Growing in organic soil, mycorrhizae and earth worm castings. Yesterday fed them epsom salt (1T./gal), seaweed tea(20ml/5L.) and Molasses(1T./gal)
Could they be needing some more epsom salt? I'm thinking a Mg deficiency.

Maybe @Emilya would have an answer?