couple things to do to make your 'used' soil good again-
-A bit of lime to get the pH back in shape
-If I were you I'd water it with a product called Soil Syrup or anything else that has humic acid in it. Conditions the soil and buffers the pH.
-If you have a compost heap with leaf humus in it, mix your soil with that.
-Add some composted cow maure and kelp compost if you can find it to refresh the nutes and stimulate beneficials