Big outdoor mother yellowing leaves.

Hey everybody, i made a thread about a monster mother plant i got from my local dispensary.
She's been transplanted for well over a week now and is looking OKAY.
she purks up and seems to be adjusting to outdoor sunlight well, no signs of shock, but she is showing yellow leaves.
She was put in a mix of compost (pic below) and natural soil, little Epsom salt, and bone meal.
From my readings i assumed it to be calcium or sulfur deficiency. but i was told yellowing leaves are a indicator that my pH level is too high.
i have never tested the pH and plan to purchase one tomorrow... any advice? thanks.

looks like ph or overfeeding issue to me as purple as those stems are

ya when i purchased her it seemed like she had signs of overfeeding... i fed her once lightly with BC products, ill stick to water for a while.