Pottendorf may be sub-miniature compared with most HO scale layouts but the scenery to track ratio is about 50/50, if only because the prototype was minimal.
To attempt to replicate this sward of broken grass, Heki 10mm 3377 static grass was used but I also place a roughly torn piece of Heki Decovlies in the wet PVA before applying the static grass. This gives a element of variety to the scene and when perfectly dry, I carefully soak a pach of grass with cheap sticky hairspray and then apply a second coat of static grass.
Other, more broken rough grass can be a problem but I tend to use pieces of MiniNatur grass mat, roughly torn, if only to vary the appearance.
Weeds - seem to be neglected but thanks to Gordon and Maggie Gravett, they are easy to replicate.