How well dose the turf resist weeds from growing through it like yellow nutsedge?

If you have a significant weed problem, it is recommended to use a pre-emergent herbicide below the base material. Also install weed barrier cloth prior to laying down the turf. The turf itself acts as a weed barrier, however, without the pre-emergent herbicide and weed barrier cloth, you may get some weeds around the edges and through the drainage holes.