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

[JDU]

That's a pretty big change in ph..... at the same time as the harder soil...... You're probably locked.

[CaptainWiese91]

What type of soil is that ?

[Zion86]

This morning I back flipped the pot and was not surprised to see that the roots simply couldn't penetrate the newly added soil and stayed in the peat moss medium environment
Si I emptied the pot of all the newly added soil and filled the pot with peat moss again.
I watered the pot with half a liter of water with dissolved nutrients in it to give it a lil boost.
Hope this puts us back on the right track.

[SoOrbudgal]

Bold move and great job

[SoOrbudgal]

Thing is coco peat is good but needs perilite stone to help create pockets of air.

[9fingerleafs]

The plant needs nutrients in flower, specially potassium and phosphorous. That’s why the leaves look burned