Help with leaves problem,

Noticed a lot of leaves like this and lots of yellow ones, unfortunately I didn't think to take pictures so this one was removed an hour or so before the picture and didn't look dried and shrivelled on the plant, other one is how the plant looks now, took about twenty leaves off, leaves don't look deep green enough in my eyes, growing in biobizz all mix, ten days into 12/12, in a tent and no nutrients added, also using LED lighting,

I think what's going on right now is your plant is experiencing rapid growth as they do during the initial stretch period when flipped to flower and the newer growth is taking a while to 'green up' from exposure to the light. If you have extra lights of any kind I would toss them in there to speed up that process for the next couple of weeks. You might want to feed it a bit more of everything as the stretch period demands extra of everything for the setting of bud sites and formation of flowers. Less N and P after the stretch but still some.

Hope that helps.

Magnesium deficiency. Look it up.

Thanks for the replies, i've started feeding with biobizz grow,

Mgso4.

Dirtydonk said:

Thanks for the replies, i've started feeding with biobizz grow,

Click to expand...

That likely has Mg in it but a tsp/gal of Epsom Salts or some CalMag is good to add once in a while too.

Did you check ph in and out? I can only see the leaf picture but nearly red stem, I think ph lockout