Oldmanbud50 said:

Iv read somewhere that u can reuse it. If it as been flushed with pH nutrual. Water. But I'd look for more on this. I suppose depends on what medium u grow with. But gl with it if u do..

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MIMedGrower said:

Used potting soil is compacted and depleted.

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MrGood said:

So i should toss it and get new? Got it thank you

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MIMedGrower said:

I would. I want fresh stuff each time for best results. I am most interested in drainage and ph stability. Plus there are so much roots and not much soil in my 3 gal pots at harvest.

However the “living soil” crowd will have a very different opinion on this. They use enzymes to disintigrate roots and mix in fresh compost and ammendments or simply replant like with outdoor garden beds.

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Kanzeon said:

It depends.

It can be reused, but it needs to be treated before being used again. There are nutrients bound to it, and in the ways that throw off pH. There's also the risk of any eggs of any pests that were around being in the used soil. Fungus gnats and thrips, I'm looking at you.

I soak my used mix in hot water to leech everything out, then let it drain out. Then I run around the same volume of boiling water over it, and let that cool. Then it gets re-amended with EWC, 4-4-4, and rock dust, as well as inoculated with good bacteria. (Bacto)

If you want to go to that kind of trouble to save dirt, it can be reused.

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