Leaf Discolouration, what am i missing?!

hello people! hope all is well, i have a critical + and WOS afgani kush x yumbolt (not pictured) from seed here that are displaying uneven leaf colour. im in pro-mix using jacks classic (20-20-20) at 1/4 strength every other watering. they are about 3 weeks since i transplanted out of solo cups in 3 gallon pots.i check my ph every time i water and nute as well as my ppms, which are goin in at 300-360ppm.

Well there is yellowing between the veins so that only leads me to believe that its a micro nute problem. up the micro, might want to foilar feed with micro to speed up the healing 2x-3x a day(hydro nutes only of course).

agreed, a LITTLE more nutes would help. if your staying in veg, go a lil heavier on the N, and heavier on the trace elements.
Dont go burning them now, a lil deficient is much better than toxic levels chems burning the roots, killing the plants.

is this just on one plant? and you feed all the plants the same?


leaf discoloration is not always down to nutrient deficiencies. it could be some type of shock also, or even something known as variegation. Some strains get stressed by intense light and the shock can cause variegation.

No its 2 out of 19 plants, every plant is a different strain. Now that u all mention it, I forgot when measuring ppms u need to subtract the ppm levels of the water, when I was feeding hem the ppm would read out 300, my tap water comes out at 145, so In essence I am only using half strength! I'll bump it to 450 next time I Nute.. or I can foliar spray with the 20-20-20 or amino aid

yes, nutes check ppm, and keep those toes away from them,

thanks for the advice!