Plaster's Green Meadows (grid reference ST532611) is a 4.3 hectare biological Site of Special Scientific Interest near the village of Nempnett Thrubwell, Bath and North East Somerset, notified in 1989.

This is an area of unimproved and traditionally managed species-rich meadows which support a neutral grassland community of a type which is now rare throughout Britain.

The site is characterised by the nationally rare Common Knapweed (Centaurea nigra) and Crested Dog’s-tail (Cynosurus cristatus) and dominant grasses include Sweet Vernal-grass (Anthoxanthum odoratum), Crested Dog’s-tail and Yorkshire Fog (Holcus lanatus), while Quaking Grass (Briza media) and Yellow Oat-grass (Trisetum flavescens) are also frequent.

The calcareous nature of the soil is reflected by the presence of Cowslip (Primula veris), Fairy Flax (Linum catharticum), Glaucous Sedge (Carex flacca), Lady’s Bedstraw (Galium verum) and occasional Salad Burnet (Sanguisorba minor).

Hedgerow trees include Ash (Fraxinus excelsior), Sweet Chestnut (Castanea sativa), Holly (Ilex aquifolium) and Oak (Quercus spp.