A 75-in tall greenhouse that stacks five wire shelves into a footprint of only 27-in by 19-in, so a balcony or narrow terrace can hold a full seedling operation. Every shelf carries 22 lb, enough for a tray of starts, a row of 6-in pots, or a few larger containers. The PE grid cover passes sunlight to the plants while blocking wind and cold nights, and a 19-in by 64-in door rolls up, zips closed, and straps back for watering and airflow. An electro-coated frame resists rust season after season, and 12.5 lb of parts clip together without tools.