re: Need help w/ my Gardenias

I love them. They were my dad's favorite shrub plant and I like the smell of the flowers a lot. That said, I've had it with these radicans variety. What really doesn't make sense is that half of them are doing totally fine and the other half look like shite. They're all planted in good raised bed soil, all fertilized the same way, I try to keep the pH down, and they're all irrigated. Makes zero sense to me.