 mulching beds can definitely help retain moisture and prevent weeds so two to three inches should do the job then set your mower higher mow that turf at two and a half to three and a half inches when it gets really hot depending on the time of the year and in illinois is on the line with a question about a porch how can i help you today well i have this problem this porch is closed in even on the north side but the north side of it is not finished and recently i have had this