Does anyone have any tricks as to getting a dahlia flower to last longer in a vase? I read a recipe on the forum I have to try -- half lemon-lime soda, half water, a couple drops bleach? Most of mine if I pick a longer stem tend to last a little longer than the same flower on a short stem, but that's the only trick I know of.
I ask because next year, at the end of september, I'm getting married : ) and I'm growing dahlias for the wedding (about 50 plants, means about 150 next year, so more than that in flowers. I'm on a roll...). If I could find a magic mixture to keep them another day extra, that's one more day I could pick them early, or for some of the really obstinate ones that don't last more than a day, perhaps the night before.
I've got some good bloomers now that I can try a few gimmicks with. Lend me your tips -- I'll give you my results in a few weeks. October is a decidedly nice time for dahlias in Jersey.