Has anyone used 3.2 oz white landscape fabric in hi tunnels or field crops and if so does it block weeds as well as the black landscape fabric? 

 I would like to use it as a weed barrier that also reflects some light back up into the canopy and that does not warm the soil as much as black fabric does.  It will be used in a perennial setting so I prefer the woven ground cover over plastic.  Thanks in advance,
Andy Farmer