What's the noun for landscaper? Here's the word you're looking for.
landscape
A portion of land or territory which the eye can comprehend in a single view, including all the objects it contains.
A picture representing a scene by land or sea, actual or fancied, the chief subject being the general aspect of nature, as fields, hills, forests, water. etc.
The pictorial aspect of a country.
(printing) a mode of printing where the horizontal sides are longer than the vertical sides
A space, indoor or outdoor and natural or man-made (as in "designed landscape")
(figuratively) a situation that is presented, a scenario
“There can be no doubt that three of the most important 19th-century landscapists were linked artistically.”
“This catalog and show will please the lovers of craftsmanship in black and white photography as well as the followers of a long tradition of American landscapists.”
“Joined with Durand as the earliest of the landscapists is Thomas Cole.”