I have used black plastic under the beds and between. Covered between the beds with wood shavings but the weeds grew in it anyhow. So I'm pulling it up. I use my weed whacker to weed between the beds. Takes just a short time, weeds die and make a mulch.That is a beautiful garden. Black plastic would keep nutrients from being washed away, and thaw the ground quicker in spring. Might even get some composting action going on under there.
In the middle bed you can see the large cans I push down around some plants. These I just fill with water and save water. No spraying and wasting water. The cans keep the water around the plants. Watering takes just minutes.
Weeding is easier since the soil is not packed down.
Raised beds also let me control what soil goes in them. I can add composted manure or bagged garden soil (miracle grow). I buy the soil when it's on sale and store it.
I now have two compost piles which gets the chickens cleanings, yard and house waste, so I buy less soil. Composting in itself is an art.
Rotation is easy with raised beds too. My garlic grew where the tomatoes had been and did very well. Too you don't lose soil to erosion.
Also if I'm not up to it I can cover beds and leave them empty. Last year I uncovered one bed and found a big fat mouse and a large snake. I chased them out and planted Okra.
