Rockwool is made by inorganic fine stone fibres, it would not consume or contribute water and nutrient to plants, and it provide perfectly even distribution of WC and EC. Thus the precise control of plant growth become easy. 

This is the 3rd generation of UPuper® Rockwool substrates which started in 1995. The quality and performance has been widely appreciated by growers around the world. 

UPuper® has always been compared by growers, and we do the same thing over and over again every year. The tests completed in June 2020 shows an average 8.3% yield increase compared with the top brand in the market. 

Started from 1993, Sigma Stretch Film grew up to the industry leader which owns 5 plants across US and Canada, with 600 million pounds of capacity. 

At the heart of Sigma manufacturing philosophy is a core belief that products should be simple to use across a variety of equipment and in all climates.  The Sigma manufacturing team are laser focused on producing a world class quality product, and it shows in their results

Provide a consistent product at a fair price in configurations that make sense for our distribution partners and customers did allow Sigma to continue growing faster than the market and separate itself from the pack.