  In the dense supernova environment, neutrinos can undergo fast flavor
conversions which depend on the large neutrino-neutrino interaction strength.
It has been recently shown that both their presence and outcome can be affected
when passing from the commonly used three neutrino species approach to the more
general one with six species. Here, we build up on a previous work performed on
this topic and perform a numerical simulation of flavor evolution in both space
and time, assuming six neutrino species. We find that the results presented in
our previous work remain qualitatively the same even for flavor evolution in
space and time. This emphasizes the need for going beyond the simplistic
approximation with three species when studying fast flavor conversions.
