Help!

Help!

I apologize fro my first posting being a cry for help, but I have a gardenia plant that is either very sick or very angry with me. Leaves are turning yellow, then brown and then of course falling off. I mist the leaves with water, water it to keep the soil moist, and fertilize it with acid-loving plant food every other week. I don't know what else to do. Any help would be greatly appreciated.
Some Pictures

Some Pictures

New! :)

New! :)

Plant ID

Plant ID

Picked our first cukes today!

Picked our first cukes today!

I need your opinions!

I need your opinions!

Orchid questions

Orchid questions