"There's something about using all green flowers that's calming," says Los Angeles floral designer Kimm Birkicht of the Velvet Garden (323/852-1766). For our arrangement, we put hydrangeas, passion vine, cymbidium orchids, and sedums in a water-filled ceramic pot. To arrange the sedums, secure them to a wooden skewer with thin wire. (Later, you can replant the sedums; unwire them, let them harden off for 4–7 days, then place them directly on the soil, where they'll take root.)