Doing an estimate for a fairly large "bed mulching" (775 sq ft). The bed is already established with a multitude of different plants and has some varying degrees of weed problems. The customer has asked for a price on removing the existing bark mulch and replacing with a compost mulch. They also want the landscape cloth put down first. I'm not a big fan of the cloth, but how can I convince them that weeds will not be a problem?