They say you shouldn’t sweat the small stuff.But when your pad is the size of a postage stamp, that’s pretty much all you can do.Baylor Chapman of Lila B. Design is a double threat for perspiring apartment-dwellers. She delivers gorgeous floral arrangements and can transform even the smallest space into a living, breathing work of art.Chapman’s bouquets win raves for their sustainability (she sources buds from a roof garden in the Mission or a shared Dogpatch lot). And the former UC Berkeley garden design student works wonders with patios, flower boxes, balconies, and pots — filling them with succulents and perennials for an organic, natural result. She’ll even incorporate food, like an eggplant or tomato plant, for a touch of edible beauty.Trust us: She’s kind of a big deal.Lila B. Design, 2150 Folsom Street, at 18th Street (415-563-6681 or lilabdesign.com).