The compound NdMn 2 Ge 2 , has been studied by spin-echo NMR, AC susceptibility and neutron scattering. NMR spectral lines of 5 5 Mn, 1 4 5 Nd and 1 4 3 Nd are observed at 4.2 K. Changes in the 5 5 Mn spectrum with temperature reflect changes in the magnetic behaviour, with transitions around 23 and 218 K appearing at the same temperature as AC susceptibility peaks. Neutron-scattering measurements show that applied pressure increases the rare-earth ordering temperature, increases the temperature dependence of the cone angle and decreases the propagation vector of the cone, but does not have the same effect on the magnetic properties as the 'chemical' pressure of Si substitution for Ge.