Wow this is an old question that's still up. I would suggest unsulphured Organic Blackstrap Molasses. It has potassium,phosphorus, calcium,magnesium,vitamins,amino acids plus plenty of carbohydrates to feed your beneficial microbe herd in your soil. Use one tablespoon per gallon of water once a week. I find that its easier to dissolve it in 2 cups of water warmed up in the microwave then let it cool then add to the rest of the water.👍