Silver echinops (also known as globe thistle) and spiky, steel-blue eryngium (or sea holly) mingle with feathery white flowering astilbe. All can be found in farmers' markets and are easy to grow. Cut stems at an angle, and anchor them in a vase using a flower frog. Finish with astilbe foliage and sparklerlike Queen Anne's lace (if planting your own, skip Daucus carota, an invasive weed; instead, try its better-behaved cousin Ammi majus) to set off those big, booming blossoms.
Flowers for the Fourth of July
Martha Stewart Living, July 2011