Are you supposed to cut rose stems with a knife? I always use cutters. Is that bad? I learn something new everyday around here. I'm trying this trick today.
Sarah Jane,
Yes and no. The main thing is to make sure you are using a tool that will not pinch the tiny veins running along the sides of the stems. This can be caused by using tools, like scissors, that have a tendency to loosen. When they do, the precision is gone, and you will find that the flower is getting bent downward as you apply pressure.
Not good. This is damaging those veins and they will not be able to take up water, as Shannon said. The problem with the cutters that I used is exactly that. Once the nut starts to loosen, there is give and that is very bad. The cutters are expensive and so people don't replace them as often as they should.
I had someone come and take mine to sharpen them and put them back together. He used some sort of oil in the mechanizm and it killed a lot of my flowers before I figured out what had happened! Now I just buy new. I seldom use a knife except for really soft stems like callas.
Cleanliness is paramount. Everything that is on that cutting edge is being transferred into the veins of each flower you cut. This is not a 30 second rule thing. You are definitely transferring it. So cleaning your tools often, and by often I mean a MINIMUM of once a day, is crucial to vase life.
The reason I made the comment about the cutters is because there are many, many purists who believe you never use anything but a knife. I was one of those until I worked at a shop that did not allow designers to use knives! He didn't want anybody to get hurt so he wouldn't allow it. Much to my surprise, it didn't seem to have any effect on vase life, and so the habit stuck with me.
So, there is the long answer to your question. Go ahead and use cutters but keep them in tip-top condition and when they start getting old, (six months is my top age) replace with new or find someone who can bring them back to good operating condition without using oil.
I can't wait to hear how your first attempt goes!