United States 
How deep does a raised bed need to be to grow beetroot and onions sets
1 Sep, 2012
United States
How deep does a raised bed need to be to grow beetroot and onions sets
1 Sep, 2012
Am not sure about Beetroot but Onion needs about 2 inches of good soil. Raised beds tend to be at least 6 inches deep of good, loose soil, probably double that.
1 Sep, 2012