If you started reading this hoping for a definitive answer to the question above, I'm sorry to disappoint. I've been reading about Zeolitef for a while and--given the nature of the soil in my garden--decided to give it a go this year, working about 3 pounds into roughly 300 square feet of garden space as a test. I'll report back on the yields, but how well it works still … [Read more...] about Zeolite: Yay or Nay?