  We evaluate the problem of galaxy formation in the landscape approach to
phenomenology of the axion sector. With other parameters of standard LambdaCDM
cosmology held fixed, the density of cold dark matter is bounded below relative
to the density of baryonic matter by the requirement that structure should form
before the era of cosmological constant domination of the universe. Galaxies
comparable to the Milky Way can only form if the ratio also satisfies an upper
bound. The resulting constraint on the density of dark matter is too loose to
select a low axion decay constant or small initial displacement angle on
anthropic grounds.
