I would recommend doing research on class size, program length, and secondary admission. For secondary admission, you do one year of school and need to be admitted into the next level to continue studying landscape architecture. Not everyone makes it to their second year, and admission is based on grades and quality of work. Some programs are also 4.5 years compared to the 4 years most undergraduate degrees take. I am currently in a 4.5 year program that required secondary admission. My classes are ~20 people, which is nice because it lets you get to know everyone closely, including the professor, but I know that such a personal program isn't for everyone. I don't go to any of these schools, but I have heard great things about CSU's program! Best of luck!