THE LANDSCAPE FABRIC DOES LET AIR AND WATER THROUGH, BUT IT'S USUALLY SUGGESTED THAT YOU MULCH IT. I WOULD THINK THAT IF YOU PUT DOWN LOTS OF MANURE, PUT BLACK PLASTIC DOWN, AND PLANT, THE BLACK PLASTIC SHOULD LAST FOR POSSIBLY TWO YEARS. ALSO REMEMBER THAT ONCE THE GROUND IS MOIST, THE BLACK PLASTIC ISN'T GOING TO LET EVAPORATION STEAL YOUR MOISTURE DURING THE SUMMER. ALSO WITH THE PLASTIC, YOU CAN PLANT EARLIER AND HEAT THE GROUND UP WHICH SPEEDS UP PLANT GROWTH. GOOD LUCK.(posted 9009 days ago)