"hitherto unexplored" is a correct and usable phrase in written English.
It means "not yet explored or investigated" and is typically used to describe something that has not been studied or discovered before. Example: The scientist set out to explore the hitherto unexplored depths of the ocean, hoping to discover new species and unlock the mysteries of the deep.
Unless this one is just evidence of a hitherto unexplored connection between parenthood and gardening.
We've created a sort of uber-ensemble that offers a glimpse of totally new ways of performing music hitherto unexplored.
Norway awarded Arctic drilling licences to 13 oil companies on Wednesday, including in a hitherto unexplored part of the Barents Sea, drawing condemnation from environmental groups.
Instead, Wells described Pavlov, whose systematic approach to physiology had revolutionized the study of medicine, as "a star which lights the world, shining down a vista hitherto unexplored".
It was inevitable that Dee would be cast in two of Spike Lee's best movies, Do the Right Thing (1989) and Jungle Fever (1991), because they examined a hitherto unexplored range of themes from a black perspective.
Cassel played the father with understated ease, displaying a hitherto unexplored softer side and a remarkable facility for languages (Cassel speaks Brazilian Portuguese throughout; he is also fluent in Russian and English).
The chances are that both bids would get the approval of America's main telecoms regulator, the Federal Communications Commission, but because they raise hitherto unexplored antitrust issues, neither bid could expect to whistle through.
A four-engined aircraft piloted by Sigizmund Aleksandrovich Levanevsky disappeared in the Arctic Ocean and set in motion a large-scale, though unsuccessful, search that covered vast areas hitherto unexplored and added tremendously to flying experience.
A final, defining Polly paradox: while her lyrics are acclaimed as taboo-busting (eg Dry, with its ultimate image of male failure: "you leave me dry"), and are celebrated for opening up hitherto unexplored realms of female sexuality/subjectivity, musically Polly's a traditionalist.
But that's O.K., because just when you think Kushner is losing sight of how to handle the seven primary characters — eight, if you count the Angel — he brings out a new and hitherto unexplored empathy for a family that is not biological, let alone chosen.
The same attempt was made in "No Strings Attached," while "The Switch" raised the question, hitherto unexplored, of whether you can donate sperm to someone who doesn't know (a) that it's yours and (b) that you love her, any more than you know it yourself.
