Meaning that one must let the vines grow as they will around ones abode to fully be naturalised? Probably true, though I don’t fancy a tree growing out through the middle of my floor. What I think he might be getting at here is a rewild your soul kind of idea. Let the vines grow where they may, yes be spiritual about it but also natural in an older, ancestral hunter-gatherer sense. Live within your means and with what nature provides. Live in a cave or a shelter made from mud, grass and the trees of the forest. Of course this is nigh on impossible to achieve, though far more plausible in 1849 than now.
A man doing that now would be deemed a hazard, or a charity case, but what if he is the happy one? What if he may prefer living out in the woods in a tent? You take pity on him assuming he has lost his home or his family in some way and you leave meals or gifts for him. He may have chosen this way of life entirely by himself. Where you see sadness and failure, he may see happiness in waking to hear the bird song and falling asleep to the sound if the wind in the trees. Who are we to say what is preferable?