Iberis sempervirens, or candytuft, is quickly becoming a plant I immediately identify with Capitol Hill gardens. Many of the postage stamp sized front gardens in that area are elevated, with a three or four foot retaining wall meeting the sidewalk. And in many of those gardens, Iberis tumbles over the edge of the wall.
Iberis as you may guess is named such because it's from the Iberian peninsula and in other areas of southern Europe. It is best suited for dry, rocky soils and will not handle any saturated conditions -- it will immediately start to die off. It blooms for several weeks, up to three or four -- which is longer than many other spring perennials. And of course, it has this brilliantly clear white blossom. When the sun hits it, it's hard to focus on the individual petals, the reflected light is so bright.
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