Cocktail bitters made from marigold flowers. Lilac flower face cream. Scented geranium sugar. A laurel bay wreath. These are some of the 47 straight-from-the-garden projects in Harvest: Unexpected Garden Projects, a gorgeous new book by edible-landscape designers Stefani Bittner and Alethea Harampolis, who run Homestead Design Collective in the San Francisco Bay area.