Our History
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Professional Certifications/Memberships
Certified Landscape Technician - Exterior
Pennsylvania Landscape and Nursery Association (PLNA) has licensed the CLT program from Associated
Landscape Contractors of America (ALCA) and has elected to offer Common Core and three test
modules: Installation; Maintenance; and Irrigation. To become a Certified Landscape Technician, an
applicant must pass the Common Core test problems plus one of the Modules.
Member of the Interlocking Concrete Pavement Institute
ICPI is the leading technical organization on segmental concrete pavements in North America.