Doug and Barbara Crispin managed to grow African violets in the tundra. That should tell you something about the crop at their shop in Englewood, the Violet Showcase, the only store of its kind in the country. The Violet Showcase is packed with new and unusual varieties of the world's most popular houseplant, African violets in pink, purple, white, red and all colors in between. The Crispins grow and sell flowers in the store, stock everything from grow lights to leaf support rings to self-watering pots, and ship orders nationwide. "It's an odd little business," Doug says of the 31-year-old shop. "We're basically a plant farm, roadside stand, mail-order company and retail shop all in one."