Replace the water regularly.
Cut the stems the right way.
- Cut at a 45-degree angle.
- Snip another inch or two every time you switch out the water.
- Keep the stems underwater while you cut them -- doing so allows the flower to immediately replace the water it loses when its stem is sliced.
- Make sure no leaves are hanging out on the stems or getting submerged, which can just encourage bacteria to grow in the source of your flowers’ life.