Thanks for article @fernowl13. I agree and find concrete blocks the best for me for raised beds. Another advantage for me is the holes help support the pipes and faucets for my watering. I would differ in they use less water as I find the water percolates deeper in the looser soil. I guess it all depends on where you live and your soil type. I see in one of your responses about the negatives of wood chemicals. That might be a good follow on article - discussing the pros and cons of alternatives.