Grass peat
Grastorf stands for
- Grastorf, historical name for a place near Laatzen in Lower Saxony, see Grasdorf (Laatzen)
- Robert Grastorf (1872–1952), civil engineer and building contractor in Hanover
- Robert Grastorf GmbH , construction company founded in Hanover in 1902 in Hanover-Wülfel
- Ernst Robert Grastorf GmbH , gravel and concrete works in Hanover-Wülfel separated from the Robert Grastorf GmbH construction company in 1923