How can I avoid spending a fortune on potting soil?




Due to back problems, I have switched to container gardening. Not only are big pots expensive, but so is the soil! I have been told I should switch out the soil each year. I don't believe that is necessary, but wonder what other people are doing? Do you change out your soil, or reuse it? Please let me know how to reuse potting soil, thanks.

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I use water bottles, or sada cans in the bottom of my planters. I buy Miracle Grow soil at Costco or Lowes and add what I need to the top then mix it in. I do not think it is necessary to change out your soil yearly. You could add mulch to the bottom on top of the water bottles for drainage.