Yellow Leaves

Yellow Leaves

Do yellow leaves mean too much water, or not enough? Which types of plants like to be misted with water? Im not sure which like it and which don't. Some pictures... Yellow Leaves... Anyone know what is happening to my Lantana? Look at the leaves... :-( Here is my new Swiss Cheese Philodendron I saved from the clearance section at Lowes... Is there Hope?
plant ID

plant ID

More things in the garden!

More things in the garden!

new room, so much space!

new room, so much space!

Paperwhites

Paperwhites

my room

my room

My first little veggie garden

My first little veggie garden