What Size Boxes Recommended?

Q.  What size Grow-Box should I use? I have the original More Food From Your Garden, and the grow boxes are 5’x30′.  Now when I look on the website it says the boxes are 18″x30′.  Which is correct?  And why in the heck did you change the sizes?

A.  We grow in both 18″ wide and 4′ wide boxes now, but you can use any width you want.  Dr. Mittleider’s experience has just shown him that these two sizes work the best, for many reasons, which only 75 major projects and 38 years’ experience in 27 countries can teach.