What's wrong with my OG Kush plant?

[Zion86]

Planted this Og kush seed in the first week of April. Was giving it a 7.2 ph water and it was doing fine, then I switched to a 6.5 pH when the buds showed up, and transfered it to a bigger container with with a harder soil. I'm obliged to keep it outside and giving it a 12-13 hours of sunlight per day and 1 liter of water. Never had any major problems until 2 days ago when the leaves became brownish and harder.
Never gave her any food/nutrients so maybe I should give her some now.

Please advise me on how to proceed from now on regarding the quantity of water, sun and nutrients in order to help this beautiful plant regain it's health and give good buds.
Thanks in advance for your advises

 

[Bionic Chronic NZ]

you need to be giving her 18hrs good light each day and that soil is a major problem....... go get some tomato mix at least man or it's not going to go well for you.

 

[Zion86]

you need to be giving her 18hrs good light each day and that soil is a major problem....... go get some tomato mix at least man or it's not going to go well for you.

so outdoor is not an option?