Perhaps the ultimate luxury: a designated sink area for tending to the needs of household plants and arranging flowers.
Above: A gardening sink in Sweden by Agnetta Enzell.
Above: A sink used for floral arranging; photo via House Beautiful.
Above: A gardening sink at Terrain, outside Philadelphia.
Above: As usual, the English have it covered; image via Light Locations.
Above: A florist's sink from the September 2007 issue of Martha Stewart Living via Vignette Design.