PromoCo is Washington D.C.'s premier meetup & delivery service offering the best flower and concentrates in the area. We opened in 2018 as a cart based service, but have since blossomed in offering a variety of products while upholding our commitment to exceptional customer service. Our reputation speaks for itself. DC’s Premier Service for Flower, Carts, Concentrates & more!Promoco DC is Washington D.C.'s premier meetup & delivery service offering the best flower and concentrates in the area. We opened in 2018 as a cart based service, but have since blossomed in offering a variety of products while upholding our commitment to exceptional customer service. Our reputation speaks for itself.