OLCA is a not-for-profit statewide professional organization that advocates for the landscape industry on local, state and national issues affecting both the profession and the world we live in. OLCA functions through the active volunteer work of our membership. The Oregon Landscape Contractors Association membership includes: -Landscape Contracting Professionals -Landscape Maintenance Professionals -Arborists -Suppliers to the landscape industry -Staff from educational institutions and students in the horticulture program