I am going to order some shade fabric for my low tunnels for lettuce/spinach production in summer. What percentage is right? The wholesale rep said 50%. I plan to use just 6 feet wide across the top of the tunnels with the sides open and lots of grommets to attach cords to. The local wholesaler says 6x100 feet with grommets every 2 feet of 50% black shade fabric is around $125. That is cheaper than Growers Supply.
I just got an email deal for Growers Supply though. $75 off a $500 order. I still have lots to order from them.