Carol Allen CBLP Level 1- Basic Foundation in Sustainable Design and Installation Specialties Photos About Carol Allen Poplar Hill Horticultural Services 14320 Poplar Hill Rd Germantown, Maryland 20874-3563 240-994-5043 email@example.com Summary of Services Design of stormwater management systems, raingardens, and conservation planting. Tree canopy design, maintenance, and installation. ISA certified arborist, professional horticulturist and educator. Years of Experience: 20 Loading... No Records Found Sorry, no records were found. Please adjust your search criteria and try again. Maps failed to load Sorry, unable to load the Maps API.