One of the reasons why I love being a landscape architect the most is how much of a variety the field allows someone to have in their daily life. I worked for several years at a company that designed public parks and gardens, as well as conducted consulting work for local governments.
There is a very good mixture of spending your working time both in an office and outdoors in the field. In the office, you will spend a lot of time working on the computer and/or hand drawing plans, sketching out design ideas, and rendering images to communicate your ideas with clients. A lot of office time can also be spent hashing out budgets, cost estimates, and researching different locations for sourcing materials. Valuable skills for this type of work include excellent knowledge of the AutoCAD computer program, Adobe Photoshop, and a good understanding of basic design principles and mathematics.
When working out in the field, much time will be spent surveying potential design sites, and overseeing construction of future sites. A general knowledge of plants, basic construction methods, and horticulture experience will definitely go a long way! Field work is some of the most satisfying work in my opinion; I love getting to spend time outdoors and seeing my designs come to life!
I hope I was able to answer your question well enough. Best of luck in your future endeavors, and I hope you will continue to consider a career in Landscape Architecture! :)