Perfect for St. Patrick's Day. For more Irish-inspired ideas, check out our photo gallery.
Source: The Martha Stewart Show, March 2009
Green food coloring
Mix food coloring with water according to the directions on the package, making sure the water reaches a dark, rich shade of green. Fill vase with this mixture.
Cut ends of carnation stems under running water and place the carnations into your vase overnight. The flowers will soak up the food coloring through the stem, resulting in vibrant green petals.