It mainly depends on the salary level in your area, your own level and the generosity of your boss.
I think: if you are a landscape major in a famous university, you are very popular and mostly design, you can be a white-collar worker. But if it's just an ordinary university, take my classmates as an example: those with strong ability can also engage in design work (sitting in an office), followed by garden engineering construction (running from the office to the construction site as a supervisor), and I'm afraid they have to do construction work (mainly on the construction site) and garden plant maintenance (sun and rain). Of course, there are also difficulties in finding employment.
Units, taking my classmates as an example: there are garden bureau, nursery, garden design company, tourism planning and design company, park, scenic tourist area, real estate company, property management company, hotel, logistics department of each unit, highway administration bureau and university teachers.