  We show that the Landau vortex-free state in rotating container may give rise
to the lattice of spin vortices. We consider this effect on example of spin
vortices in magnon Bose-Einstein condensate (the phase coherent spin
precession) in the B-phase of superfluid $^3$He, and on example of spin
vortices in the polar phase of $^3$He.
