Carnations, carnations.?

I'm conducting a 2-week long science fair project that involves applying different substances to carnation's water and seeing which substance keeps them the freshest.



How often do you think I should change the water?

Because I'm thinking if I do change the water, that may interrupt the flower's growing process.



Alright, if anyone finds anything about this topic, please send the link. My biology teacher needs proof!

D=

Carnations, carnations.?
You say something about interrupting the growing process. Are the carnations alive, with roots and in soil, or are they cut flowers in vases?

If they are cut flowers you could make up fresh solutions of water and the various substances that you are testing, and put the fresh liquid into other vases that you have labeled and handy. Then you could just quickly take each flower out of its vase and put it in the vase with fresh solution. If you do this quickly .maybe 10 seconds for changing from one vast to another, then it would be fast enough to not be of harm to the flowers. Be sure to very carefully label all of the vases and solutions as you make them so you do not get mixed up and have start out having a flower in one solution and then after the change having it in a different solution.

When you mix up the solutions be sure that they are always the same concentration. For example, if you were to be adding sugar to the water, always start out with the same amount of water, maybe 1 cup, lets say, and add the same amount of sugar, lets say a carefully measured half teaspoon. Be sure to label all the mixtures and also write everything down as you go so you don't forget or mix things up.

If you changed the solutions in each vase maybe every other day, that probably would be good. Be sure to keep track of how often you change the solutions, and even how long you have each flower out of the vase. as it is very important to put that type of information into your report.

If you wanted to make the experiment a bit more interesting, [but complicated and unfortunately more difficult to do] you could maybe have 2 sets of vases and flowers with the same solution inside, and perhaps change the solutions in one set of flowers every 2 days and the other solutions after 4 or 5 days to see if that also makes any difference.

Good luck with your experiment. I hope that I helped you.