I was reading on Rob's website about rolling a kohleria plant so it will not be so tall or leggy. Has anyone tried this technique? If so, did the plant eventually grow back to the same height again?
Ooops, got the description wrong. They call it 'rolling-up' a plant.
I've been doing this for years but it works best with young plants that still have thin and flexible stems, and is a great solution for seedlings or cuttings that have grown crowded and/or become etiolated. In fact I don't see it being effective to control the mature height of a plant, mainly because the stems become too stiff and brittle--your best bet then is to simply repot the plant deeper.
One reason why it works is that most gesneriads can send out roots directly from a stem that contacts soil (as long as it hasn't become woody). Of course it will never be necessary if you don't let the plant get leggy in the first place!