You can undertake research in landscape architecture via a Master’s or PhD route. Details given here: https://www.glos.ac.uk/courses/course/rscne-phd-architecture-construction-and-environment/
Landscape Issues is the research journal of the Landscape Architecture course at the University of Gloucestershire, providing a forum for disseminating staff and student research to the landscape profession and to those interested in the subject. The Landscape Issues website with complete archive: www.landscapeissues.com
Recently published editions:
Urban Futures Research Symposium
A recent research symposium was held at Rousham Gardens in Oxfordshire and at our campus at Cheltenham with invited guests from overseas academic institutions, and UK government agencies as well as staff from the landscape team and Countryside and Community Research Institute (CCRI).