They are not selling plants. They are selling optimism. That is why in my supermarket, the self contain growing kits cost $15. You still have to add water and sunlight.

On the next shelf, the same plant in a cheaper looking pot cost $10.

But for $15, you can turn it in to the indoor jungle like the picture. You can even see the ripe fruits in the picture. You just have to add water and sunlight, right?