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i posted a few pics of my current problem right now.hopefully the pics work.

heres some info background.im using the bc line of nutes...for veg im using bc boost,bc grow,hygrozyme and superthrive.and the medium is coco.i start the seeds in cups of foxfarm soil than after 2 weeks i transplant into coco pots

im noticing "spots" on the fan leaves which start from the bottom to middle and progress up...really only affecting the fan leaves...the shoots are green with no problem.eventually the leaf is taken over and almost crinkles and cracks i def think its affecting growth because its taking a little longer than 4 weeks for the plants to come out of veg.

i thought maybe the deficiency could be helped using some epsom salt (mg??)which i used the past few days but i wouldnt see results for a few more days.Does anyone know what this problem could be?it seems to be the only issue im having right now with a majority of my plants.Ive grown in the past and had some very successful harvest but i never seemed to have a problem in veg before.

as you can see in the pics the fan leaves almost look like burn spots.i dunno if it is even a deficiency...overfed??
the strains im growing are icecream and big bang.any help is def appreciated

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Looks like a phosphorus def from the link I'm sending...you should get ph test strips or a tester also...

Marijuana Plant Abuse

thats a really good site.

the thing is i use a reverse osmosis machine.they never get anything but that osmosis water then i add the nutes to the ro water.i checked the ph of the water coming from the ro unit and its in the 6.2-6.4 range.

does anyone know perfect ph for mj?

i was looking at that phosphorus or mg??

can some overwatering in the beginning stages of veg affect certain nut deficiences and lockout later in veg life or flower?
and what do you add to up the phosphorus lever?

You need to pH the water after adding your nutes. That 6.2 - 6.4 is fine for soil but the nutes are bringing it down further (depends how much nutes you add, the more nutes, the bigger the drop). If your pH is too low, you're probably getting lock-out.

yea i called the local hydro shop and they said using the bc line of nutes lowers the ph of the r.o water a little bit.i just ordered a legit ph digital tester bc all i have been using to test ph was fish tank strips.

after talking to the hydro shop they suggested i may be overfeeding them which is causing my problems.they said deficiency's are pretty rare if your using a good line of nutes like i am.im flushing them all out today with plain water and will go on a feed water water feed schedule this week.