Beginner Gardening: Growing new plants from pruned ends?, 2 by BlakeInCanada

BlakeInCanada wrote:
I bought a platycodon and want to chop the top third off (I would have done it earlier if I grew it myself). The wind will probably snap the stems anyway but I'll lose the first buds.

I wondered if I could put them in water or something to grow roots. Once I accidentally cut the stem of a morning glory, and put it in water, and the plant grew roots and survived! I was hoping the same might work for the tops of the balloon flower.

It's a shame to just throw all of that growth away.