depends did you grow organic or chem?
if chem no...organic...gets better each time if ya treat it right...dude on here by the name of screwdriver did a whole thread on reused soil and how to do it indoor...think its in the DIY section or the organics section
outdoor just toss it in your compost heap
Well i found a local horticulture store thats only afew miles away that sells compressed 3.8cu.ft. (about 7cu.ft.) Pro-Mix BX w/microrise for $32. Guess thats not to bad for each grow.
in my IME..... use new soils for seeding... save these old soils for transplanting...
then you are beefed up for stealth grow!
has some problem to grow seeds in soils where has high in nutes..
so save these soils for when plants getting young and ready for transplanting when roots ask for more rooms.. and will thanks you for leftover nutes.. and go on.. :hubba: