How interesting is this in growing flowers? What is it about?

How interesting! "It means "if you touch the door, you will be fed by flowers and plants, and you will live for three to five years." "How interesting this is!" " refers to the combination of mental work and physical work, which is beneficial to the body and mind. The weather changes suddenly, rescuing flowers and plants, and hard work. These two sentences express the author's thoughts and feelings about loving flowers.