Synthetic Grass Quality Rymar Synthetic Grass Johnston’s Greenhouse is now proud to offer RyMar Synthetic Grass. These innovative products offer the rich look of real grass without the time consuming and costly upkeep. RyMar premium artificial lawns require no mowing, no watering, are safe for pets, and are green year round! This synthetic grass always has the fresh cut look – even in the winter. It is the ultimate way to enjoy a great looking yard without the regular maintenance. Requiring no water, no chemicals, no fertilizers or insecticides, Rymar is not only a beautiful choice but an environmentally friendly one too. Furthermore, RyMar synthetic products are anti-microbial so you would never have to worry about harmful bacteria building up or allergic reactions caused by the grass.