just saw this on wiki answers … who knows if it works lol, but hey:
Treat freshly cut flowers with hot water, “hardening”
Immediately after cutting the flowers, put the stems in 43.5ºC water, and keep the container in a cool location for an hour or two. The hot water molecules move more quickly up the stem, while the flowers lose less water to cool air. The combination of these effects can provide the flowers with a huge increase in the amount of water it consumes, increasing the flower’s lifespan.
Yes cutting at a slanted angle seems to help keep them going! I have cut flowers now in my house from the 9th of August and they still look fresh as they say they were given to me! Never seen the likes of it before!