In this data release we provide above- and below-ground plant biomass, shoot count, shoot height, and fecundity data for field and greenhouse experiments conducted in northern California in 2016 to assess tidal marsh plant responses to gradients of inundation and salinity. This dataset accompanies the publication Janousek et al. 2020, “Salinity and inundation effects on productivity of brackish tidal marsh plants in the San Francisco Bay-Delta Estuary” in the journal Hydrobiologia.