Kalanchoe

Hi! My name is Laura, and I am a researcher at the Institute of Botany, Spain. We are studying the hybrid Kalanchoe houghtonii, hybrid between K. daigremotiana and K. tubiflora.
It would be very useful to know if whether the observed individual of K. tubiflora from your picture is cultivated or, on the contrary, survive by its own (that is, escaped from cultivation).
Thank you very much in advance!

These flower July-August in the garden out here in Botswana (ie winter time) and a great feast for the sunbirds when not so much is available to them.