Red, White, and White?

I don't know if this is going to work. Maybe one of you has experience with taking cuttings from petunias. I bought a 6-pack of a patriotic mix of petunias for 2 pots in my front yard. I thought I counted 2 each red, white, and deep purple in the 6-pack. When I got home and went to transplant these into the 2 pots, I discovered I had 2 red, 3 white, and 1 deep purple. So I have an American flag pot of flowers and a Canadian flag pot of flowers (one has red, white, and blue, the other has red, white, and white).

I thought about buying more petunias in deep purple. Then just on a whim I decided to google whether or not you can propagate petunias by cuttings. Many people said they've had success with this. I followed some instructions a random redditor gave, using a cutting from my one deep purple petunia, and I'm eagerly waiting to see if I can root a stem in water. The instructions were to remove all blossoms and cut each leaf in half horizontally. They recommended rooting after dipping the end in a rooting hormone then in a seed starting medium, which I'm out of. So I'm trying this in water.

I will update you all if this works. If it does, I'm saving myself some money while having the pots of flowers I had hoped for. If it doesn't work, I'll have an American flag pot and a Canadian flag pot of flowers in my front yard. Let the neighbors wonder . . .

Have you successfully rooted petunias before?