My interpretations of Zeus, Poseidon, Hades, and Dionysus

a mogus plant

Dionysus as a grape vine is an interesting concept, but Dionysus is the god of wine

and wine can be made from grapes

Except the ancient Greeks didn't have flowerpots. And the lava thing should be Vulcan, since he's the god of fire. Hades is god of the underworld (which is very different to hell) and he has no control over fire or magma.