Gutter-connected greenhouses have the advantages of lower energy costs, better space utilization and more uniform environment. They put all the growing under one roof allowing better materials handling and easier shipping. To get maximum use of space,movable tray systems are often installed. The basic concept is to install trays over the whole greenhouse area except for one movable aisle that is used for tending the plants. The trays are supported on pipe rollers and allowed to move sideways 18 to 24 inches, the width needed for a work aisle. When you need to get to a particular growing tray, the line of trays is pushed aside, leaving the work aisle.
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