Fiona Parry, 40, was airlifted to hospital in Stoke-on-Trent and is in a coma with life-threatening injuries.
Sylvan Parry, 46, was remanded in custody at Caernarfon Magistrates' Court and is due at the town's crown court on 14 September.
The alleged incident took place at about 09:00 BST on Thursday.
There was no application for bail at the 11-minute hearing.
A husband has appeared in court charged with the attempted murder of his wife, who was found with head injuries when taking her children to school.