The Green Solution: The First eCannabis Website! Online reservations have never been easier! As Colorado's premier Marijuana Dispensary, we strive to bring our recreational and medical customers the best quality and selection of THC and CBD Cannabis products, be it Flowers, Pre-Rolls, Concentrates, or Edibles. Why Shop at the Potomac Location: The Green Solution didn’t invent the layout of a retail Cannabis shop, but we've come very close to perfecting it. Like other TGS locations, the Potomac Street store features a large and inviting waiting room where you can browse popular merchandise while waiting for your turn to enter the product gallery. Call ahead or order your products online with our one-of-a-kind, and easy-to-use website!