How to train on being a landscape architect
Around half of landscape architects work in private practice. They may also find work with local authorities, large corporations, the construction industry, government agencies and voluntary organisations.
You either need a first degree in landscape architecture, or to do postgraduate study after taking a degree in a related subject. It is possible to start at any age, but all landscape architects have to train in the same way.
Landscape architects follow a clear career path in local government. But in other organisations it is often necessary to move to gain managerial responsibility and to widen their experience.
www.williammerrittleeds.org 
lda.ucdavis.edu 
These people are training to be landscape architects!