Yellow Spots??...

[Blender]

I am having a hard time identifying exactly what this deficiency/toxicity is. I've looked up numerous deficiencies and even blight, and cannot determine what exactly this is, probably because it's in the early stages of growth

, and the problem is not yet severe. Additionally, it's isolated to just this one leaf blade, not noticeable around any other leaves or the other plants. The plant(s) are currently a few inches beneath 8 T5 Fluoros, so I know it cannot possibly get that hot? Please help.

 

[rocketman420]

what nutes are you using. they might be getting to much. do you ph your water.what soil are you using?

 

[Adze]

Blender,

What does the under side of that leaf look like? Can you magnify it?

 

[Sat X RB]

looks to me like the first signs of Mg deficiency.

to establish this is an Mg deficiency foliar spray/mist Epsom Salts at 1 teaspoon per litre of water. a positive difference will be noted in 24 hrs.

because yr plants are young and roots are not fully developed ... the deficiency may go away by itself as the roots grow and come into contact with more soil.

so don't alter yr growing mix at this stage. unless yr plants stop growing or grow slowly ... wait a while to see if the def remains.

cheers!

 

[Blender]

what nutes are you using. they might be getting to much. do you ph your water.what soil are you using?

Not using any nutes, just using RO water with PH of approx 6.5-6.8. I'm using Happy Frog soil 4 parts 2.5 parts Roots Organic and 1 part perlite.

 

[Blender]

Blender,

What does the under side of that leaf look like? Can you magnify it?

I looked very close and I couldn't see anything crawling around on the leaves. I took the picture with a phone so I don't think I can magnify the picture without it the pic becoming blurry.

 

[Blender]

looks to me like the first signs of Mg deficiency.

to establish this is an Mg deficiency foliar spray/mist Epsom Salts at 1 teaspoon per litre of water. a positive difference will be noted in 24 hrs.

because yr plants are young and roots are not fully developed ... the deficiency may go away by itself as the roots grow and come into contact with more soil.

so don't alter yr growing mix at this stage. unless yr plants stop growing or grow slowly ... wait a while to see if the def remains.

cheers!

I will definitely keep this one in mind as I experiment with the epsom salt spray, thanks a lot man and hearty tokes!

 

[sweetestsin420]

1

 

[Wendull C.]

I think sat x Rb is right, especially with the ro.