 Ohio is a lead producer of horticulture products , from greenhouse and nursery plants to bulbs . The state is a producer of white ash trees for landscaping , totalling 25 @,@ 000 annually . California , Florida , Texas , Michigan , and Ohio accounted for 42 % of the nation 's production of bedding plants in 2002 . Oberer 's Flowers , headquartered in Dayton , is the nation 's fifth @-@ largest florist , while Aris Horticulture , headquartered in Barberton , is a world leader in research and breeding . Lake County Nursery offers over 1 @,@ 000 varieties of plants and California @-@ based Monrovia Nursery Company , a global leader , operates nurseries in Springfield . 
