[Jazuela]

Neither. I'd call it "a green and yellow bag." Whether it's filled with Miracle-Gro, deadly poisonous grubs of death and destruction, or completely empty, isn't something that would be a constant. And if the bag is closed, you wouldn't have any idea -what- was in there, assuming something was in there. Which - if it was empty, would be - nothing.

Calling it Miracle-Gro just seems...too tacky and commercial. Like Tiger Woods wearing a Nike shirt. You know the only reason he wears it is because he's being paid to wear it. Not because he likes Nike shirts.