Between 2017-2021, Mohonk Preserve inventoried vegetation in its old-fields and grasslands. The goal was to increase understanding and knowledge of the Preserve’s vegetation communities so informed management strategies could be developed. This data provides information on species composition; occurrence frequency; vegetation type (woody, forb, grass, sedge, etc.); species percent cover (dominance); and species listed, invasive, and pollinator importance status. Five fields have been sampled thus far: Spring Farm (SF, plots [n]= 96); Glory Hill (GF, n= 45); Testimonial Gateway (TG, n= 66); Brook Farm (BF, n= 36); and Pine Farm (PF, n= 27). Soil samples were taken from three sites in 2018: Spring Farm, Glory Hill, and Testimonial Gateway. All data collection occurred between the months of May and August. There are plans to add more plots to sites Brook Farm, Pine Farm, and a field that has not yet been sampled, Klein kill Farm. There are no immediate plans to resample Spring Farm, Glory Hill, or Testimonial Gateway.