The Stone Wool Spacer! This machine is made for vegetable plant propagator Roelands Plant, Canada. The Stone Wool Spacer makes it possible to automatically place young plants wider apart on a container, giving them more space to grow. The plants can be placed in different patterns on the container and the spacer can reach a production speed of up to 1800 rows per hour, and receives the orders from the management software ISAL of Indigo Logistics.