For All Flowers: Clip the stems and strip off any leaves that will fall below the waterline; this will help keep bacteria from breeding. Place the stems in cold water in a vase that has been well cleaned and well rinsed. (Mold will hasten the flowers’ decaying process, while lingering soap will alter the pH of the water.) Set the vase on a mirror to double the effect.

For Paperwhites and Grape Hyacinths: Snip the stems when the buds are full and just starting to show color.

For Amaryllis: These are also best cut when the buds are just about to bloom. When trimmed, amaryllis stems tend to split and curl, so they don’t absorb water efficiently and the flowers fade more quickly. Keep cut stems intact by wrapping stretchy florist tape (available at most craft stores) around them.