Greenhouse Production Systems
Substrate Culture Systems
Hanging Bag Technique
In sack culture, long, cylinder-shaped, white (interior black), ultraviolet (UV) treated polyethylene sacks are suspended vertically. This technique is also known as verti-grow technique. The sacks are filled with a peat-vermiculite mixture or any other substrate, such as a coco coir mix. The bottom end is tied to prevent the medium from falling through, and the top end is tied to constrain the medium into a sausage-like form. The sacks, supported by the greenhouse superstructure or other supports, are spaced 32 inches (80cm) apart within the rows, and the rows are spaced 4 feet (1.2m) apart.
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