Gardish – means cyclical, revolving (as in revolving around the orbit in the galaxy)
Rang refers to colours and Chaman means garden.
Hence gardishe-rangey-chaman refers to the changing of the seasons.
It is also the title of the a book by Qurratulain Haider. The inspiration of the title was taken from a Mirza Ghalib couplet:
Gardish-e-rangé chaman hai mah o sal-e-andalib (The days and nights of the nightingale revolve around the changing hues of the garden) – Ghalib
Interestingly, the name of the female protagonist in Haider book was Andalib Bano Begum, meaning nightingale (bulbul), also inspired by the couplet.
A legendary Urdu writer, Haider remained fascinated by the various permutations of the Indian nautch girl throughout her literary career. In Gardish-e-Rang-e-Chaman, which is considered to be a semi-documentary work, she blurs the boundaries between the respectable and the non-respectable. (Source: http://www.himalmag.com/component/content/article/247-my-candle-burns-at-both-ends.html)