The baby African Snail is as voracious an eater as its parents. It has already decimated my spider lilies.
There are some plants , like the Golden Zebra plant Sanchezia speciosa which has found its own defence mechanisms. Two years ago when the African Snail infestation was at its height in my suburb, I feared for the Sanchezia, which was attacked day and night by monstrous snails. But I don't know what chemical it has manufactured now, it is no longer palatable to the snails.
I am not much bothered about the snails now, because it has its own natural predators which keep it in control.