A major advantage from using Haygrove Tunnels with strawberries is the huge lift in Class One percentage
Some of the first independent work was undertaken in tunnelled strawberries by Köln-Auweiler Research Station in Germany by Ludger Linnemannstöns. The chart below illustrates the yield from early season Elsanta variety grown in sealed Haygrove Tunnels versus outdoor Elsanta grown under a floating double layer of fleece (row cover) and perforated plastic.
In addition to yield, the major advantage from using Haygrove Tunnels with strawberries is the huge lift in Class One percentage. Often this is increased from 50% to 60% for outdoor strawberries to 85% to 95% for strawberries grown under Tunnels. This is primarily due to the elimination of rain, huge reductions in wet weather diseases such as botrytis and the significantly reduced risks of frost during pollination and fruit set.