We define concepts like consciousness and intelligence. They may be related or may not depending on your definitions, but the whole premise here is about experience regardless of the terms we use.
I wouldn't say Fibonacci being found everywhere is in any way related to either and is certainly not an expression of logic.
I suspect it's something like the simplest method nature has of controlling growth. Much like how hexagons are the sturdiest shape, so appear in nature a lot.
Grass/rocks being conscious is really out there! If that hypothesis was remotely feasible we couldn't talk about things being either consciousness or not, it would be a sliding scale with rocks way below grass. And it would be really stretching most people's definition of consciousness.