I do not think there even was a Happy Frog product line available twenty years ago. (Was there?)
The Happy Frog fertilizer line was formerly branded as Peace of Mind. I think the HF soil line was made available at the same time the fertilizer line transitioned to Happy Frog.
§467. I am sitting with a philosopher in the garden; he says again and again “I know that that’s a tree”, pointing to a tree that is near us. Someone else arrives and hears this, and I tell him: “This fellow isn’t insane. We are only doing philosophy.”
― Ludwig Wittgenstein, On Certainty