Yellowing and dropping of leaves

Hello, So a few things are coming to mind, is your temperature only dropping 2 degrees at night? And have the highs only been 70 with 70% humidity? A lot of the symptoms the curling, the cupping up of some outter edges make me think of heat and humidity stress... i was just surprised to see an outdoor environment so consistent. Then in last week the ak has a yellow pattern that stripes right through the veins of the leaves...which i would typically associate with magnesium. Are you going to bring in some nutrients at any point or going all natural? Are you able to get an estimate of the ph going in and a runoff ph? And lastly if you aren't already I would saturate the entire pot with water each watering, the photo looks a bit dry. *does the plant perk up when you water, if so it could be partially underwatering. I'm sorry that was a lot of questions, it's just a hard one to call with such consistent outdoor environment and no ph or nutrients to go off. The outdoor battle is an exciting one but definitely has it's challenges. Happy growing. ✌️