I do a lot of water props too (and use water cuttings to save Coleus for winter,) and always thought they do better as a bunch rather than singles and have recently read a bit about the hormones, chemicals in plants that tell them they need more roots (and others that indicate more leaves are needed.) I got lost but the point important to me was that there is a higher concentration of the "make roots" hormone when multiple cuttings are in the same water (or pot) together. So now I've got water jars of different stuff together sometimes just because they will fit together. And I've been putting soil cuttings together in bigger pots. It's hard to say if it's more successful though because most of it is the same old stuff I've played with for years or it's too new to compare. Thoughts?
You can't even see it, but there's a shallow bowl of water under this mass of foliage:
