whats going on here?

This is a 100% perlite grow ph is between 6-6.5 temps are 70-80 using dyna grow veg at 30ml per gallon light source is a 240 blackstar uv led...

it looks like the start of spider mites .............i am not 100% sure but that is what i see

Have you been spraying them a lot? This dilutes the nutrients on the inside of the leaves, and if they are diluted too far they become yellow and do not recover.

The first picture looks like an early magnesium deficiency, but the whole plant looks like it has an N deficiency. Do you have a lot of little bugs flying around? If so you have thrips and should get some Spinosad (used 3 times, 5 days apart). If you have to spray with Spinosad make sure you include a 20% solution of grow in the mix, since your leaves are already displaying signs of deficiency.

The only other issue I could see is too much light, but as this is affecting your lower leaves I am ruling this out. My guess would be thrips, and if it's nutrient-related then it's a combination of N and Mg, possibly due to too much foliar spraying.

agree, nute deficiency problem. GL

100% perlite grow is hydro, your ph is too high, 6-6.5, it should be at 5.8, could be nute lock 'cause of high ph, or as was asked, are you spraying them?

DeeTee said:

100% perlite grow is hydro, your ph is too high, 6-6.5, it should be at 5.8, could be nute lock 'cause of high ph, or as was asked, are you spraying them?

Click to expand...

Agree completely.

I've seen scratches like that on plants leaves grown in a soiless mix when pH was getting a bit messed up.

Second pic looks like a mag def starting but what worries me is the colouring of leaves under the leaf on show.


Adjust pH to 5.8 and try upping your nutrient strength a little more.



J

DeeTee said:

100% perlite grow is hydro, your ph is too high, 6-6.5, it should be at 5.8, could be nute lock 'cause of high ph, or as was asked, are you spraying them?

Click to expand...

I agree also-- ph never over 6.0... 5.8 is ideal... they can't uptake properly... and yeah- you are doing hand-watered hydro- meaning you need more than just one nute and need to feed at a different rate than in soil!!!

Yep, what they said ^^^ and welcome to RIU

Compare to this:

http://www.growweedeasy.com/marijuana-symptoms-pictures

...hopefully it helps

-spek

spek9 said:

Compare to this:

http://www.growweedeasy.com/marijuana-symptoms-pictures

...hopefully it helps

-spek

Click to expand...

Nice link.