Initial sketch. I drew three plant outlines planning on filling the rest of the artboard with copies of these with minor tweaks. No sense in making extra work for myself.
Vectorized and colored in Illustrator. I kept it to three colors to be mindful of the printing process. You'd be surprised how much you can do with a limited color palette.
Then I added the copy. Without a little rain, you're never gonna grow. Embrace it.