Phyllonorycter grewiaecola is a moth of the family Gracillariidae. It is known from Namibia, South Africa, Zimbabwe[1] and Kenya. The habitat consists of savannah areas at altitudes between 470mand920mm (1,540feetand3,020feetm).
The length of the forewings is 2.4mm2.6mm.[2] Adults are on wing from February to August.
The larvae feed on Grewia kwebensis and Grewia tristis. They mine the leaves of their host plant.