Raised bed help

[lexxluthor]

After growing tomatoes and peppers in buckets for the last 7 years I decided I would like to try raised beds. I spent more time watering than picking or enjoying. I usually had anywhere between 20 and 40 buckets. I was wondering what the typical minimum and maximum depth of soil and do you put plastic on the bottom raised bed or cover with dirt? Do most put plastic on the top and cut out the holes or just soil and forget it.




Thanks