In the bean trees, what is the miracle of dog doo park?

The chapter title, “The Miracle of Dog Doo Park,” refers to the blooming wisteria, which appears dead but one day sprouts beautiful flowers. Taylor remarks that the miracle satisfies her even more than the biblical story about water springing from a rock. The story she refers to takes place in the desert when God enables Moses to draw water from a rock to save the Israelites. Taylor and Lou Ann, like the Israelites, find themselves in the desert. Their miracle provides them not with the physical sustenance of water, however, but with the spiritual sustenance of beauty.