  The production of light nuclei and hypernuclei together with heavy baryons,
both hyperons and $\Delta$-baryons, in low density matter as found in stellar
environments such as supernova or binary mergers is studied within relativistic
mean-field models. Five light nuclei were considered together with three light
hypernuclei. The presence of both hyperons and $\Delta$-baryons shift the
dissolution of clusters to larger densities and increase the abundance of
clusters. This effect is larger the smaller the charge fraction and the higher
the temperature. The couplings of the $\Delta$-baryons were chosen imposing
that the nucleon effective mass remains finite inside neutron stars.
