172. Old Potting Soil Is Your Friend (But Your Friend Could Use a Little Help)

It’s that time of year. You’re thinking about what to plant in your spring and summer garden. You’re looking at all those empty plant containers in your yard and asking yourself, what flowers or vegetables should I grow? But are those containers really empty? If you still have last year’s potting soil in those containers, you might be wondering, do I need to toss that expensive soil into the garden and buy brand new potting soil? Our favorite retired college horticulture professor, Debbie Flo...