lead up/down the garden path, to deceive or mislead in an enticing way; lead on; delude: The voters had been led up the garden path too often to take a candidate's promises seriously.
Origin: 1300–50;Middle Englishgardin < Old North Frenchgardin,Old Frenchjardin < Germanic; compare Old High Germangartin-,GermanGarten,yard2
c.1300, from O.N.Fr. gardin, from V.L. hortus gardinus "enclosed garden," via Frank. *gardo, from P.Gmc. *gardon (cf. O.Fris. garda, O.H.G. garto, Ger. Garten "garden," O.E. geard "enclosure," see yard (1)). The verb is first attested in 1570s. Related: Gardened; gardening.
Garden variety in figurative sense first recorded 1928.