I am not a landscaper. But I do have a hint for you. If you have rock beds, prepare to invest in tons of Preen to keep the weeds out. No amount of weed cloth or rocks will keep weeds out. Over time, dirt blows in and makes it a perfect place for things to grow. The best deal I found last year (Haven't looked this year) was approx 10 lb bag for $19 at Walmart. Otherwise they come in 2lb yellow jugs. The bag lasts me all year.