  We consider different methods to probe chameleons with slow neutrons.
Chameleon modify the potential of bouncing neutrons over a flat mirror in the
terrestrial gravitational field. This induces a shift in the energy levels of
the neutrons which could be detected in current experiments like GRANIT.
Chameleons between parallel plates have a field profile which is bubble-like
and which would modify the phase of neutrons in interferometric experiments. We
show that this new method of detection is competitive with the bouncing neutron
one, hopefully providing an efficient probe of chameleons when strongly coupled
to matter.
