Electrodeposited nickel has been investigated by cross-sectional transmission electron microscopy and X-ray diffraction. The [100] fibre texture and fine-grained, dislocated columnar microstructure has been considered with respect to the mechanisms of growth during electrodeposition. Fine, codeposited nickel oxide hydroxide precipitates which have formed on the {111} planes appear not to have influenced texture formation. Although strong inhibition by adsorbed hydrogen or organic species is suggested from the work of others, this has not resulted in any codeposition of other species, either crystalline or amorphous.