I use 5 gallon grow bags and for my just completed grow used Fox Farm Ocean Forest soil. I fertilize throughout my grows. I’ve always emptied the bags and started with fresh soil each time. Can I re-use the soil and not have nutrient (or other) issues? Autoflower, if that matters. Thanks team!
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You can, but it will likely present challenges in managing pH and PPM.
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Do a slurry test or test some runoff and see what the numbers are.
You can certainly reuse soil. In fact Fox Farms makes an amendment to kick up the organic part of old soils. Its sold under the Happy Frog brand.
Here is a pic. Pretty cheap if I remember correctly.
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I was wondering the same thing only adding some new fox farm soil maybe 50/50 to the old soil
(grew 1 plant in it). What do you guys think?
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I think if you flushed the soil during the last few weeks of growing it would be ok. You will certainly have to feed earlier but cant see why it wont work. Stuff grows outside year after year in the same dirt. Perhaps a good wash/flush before planting and just treat it more like coco with nutrients from the start.
I reuse my coco like you proposed by adding 50% new to it. The stuff I dont use gets put in my outside garden boxes to keep my dirt loose. I have a lot of clay out here.
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I don’t plan on flushing during my grow 
but can do it before reusing for next plant. Thanks for the advice. Love to spend my money where it is needed and not where it isn’t.
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I’ve been reusing the same ff soil for the last four grows. I use ro water and give water only during last week or two before chop and I’ve never had any problems.
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Yes, I do it all the time. I just reload it with some happy frog 4-9-3, a little new happy frog soil to get the pot back to full, some worm castings, bone and blood meal.
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Absolutely , I saw the happy frog soil conditioner in the store this week.
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Happy Frog, it is. You guys are the best - thank you!
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