The leaves of Grey poplar are round to ovoid and slightly lobed. The lower leaf side is gray tomentose. The leaf-margin is notched.
The male catkins are gray to reddish. The female inflorescences (catkins) are greenish.
The seeds are very small and forming white seed wool.
The twigs are greenish yellow to light gray with lenticels and leaf scars. The buds are oblong, brown and taper to a point.
single tree or planting in groups, pioneer plant