- Manufacturer of Commercial Greenhouses for horticulture, aquaculture, hydroponics, retail stores and education. Agra Tech, Inc. manufacturers quality commercial use greenhouses and accessories. RISING Fuel costs got you DOWN From closed to open in just minutes, the Agra Tech roll -A- roof is the ultimate in retractable roof systems. Agra Tech, Inc. is a 29 year old company specializing in ...www.agra-tech.com