Can I reuse promix for organic grow?

Hello guys!
I did a grow on promix as medium and used micro, grow, bloom Advanced Nutrients for my grow. It did alright and I'm happy with the results, but for my next grow I'm thinking I'll do a organic grow, with someone stuff first to see the organic power at it's basis. I'm going for half my pot size of promix and perlite and the other half with compost and worm castings. And I'd like to see how that does with compost teas and such.

My question is if you guys think I can reuse my promix that I used with AN nutrients for my grow. Thanks a lot in advance.

I think that’d be fine. you could run some water or florakleen water through the promix if needed, then amend with organic stuff.

It's hard to say, I'm sure you "could" but I wouldn't. With an organic grow you are focusing on creating a flourishing microbiome, which chemical fertilizers, particularly phosphorus fertilizers, suppress. If you were to reuse it, I'd flush it well for sure. Since you want to give organics a shot, you might as well start off on the right foot and use fresh media. Here is a good massive decade long thread about organic growing: https://www.icmag.com/ic/showthread.php?t=53792.

@Redskare87 I haven't heard of this florakleen, I'm going to look it up.

@Runumo yeah, it's just that I have so much of that promix I would like to use it, if it's possible of course I don't want my little plants to have some issues down there. I'm going to check that thread man, thanks

DoobieDoobs said:

@Redskare87 I haven't heard of this florakleen, I'm going to look it up.

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Yeah it definitely works if you need it. You’d probably be good without it or flushing your pro mix as long as you’re not regularly adding more chemical ferts and amending instead with organic stuff your colony won’t suffer too much from what’s left in your medium.

I wouldn’t mix half pro mix and half compost/ewc
Ur gonna have a pile of useless mud , more like 25-35%

CTGrown203 said:

I wouldn’t mix half pro mix and half compost/ewc
Ur gonna have a pile of useless mud , more like 25-35%

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The measurements I'm thinking is

For each 20 liters of medium:

6 liters of promix
5 liters of perlite
3 liters of ewc
6 liters of compost


Do you mean I should increase the ewc, compost part?

DoobieDoobs said:

The measurements I'm thinking is

For each 20 liters of medium:

6 liters of promix
5 liters of perlite
3 liters of ewc
6 liters of compost


Do you mean I should increase the ewc, compost part?

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Do some digging around about living soil.That will tell ya about what and how much.

A good way to check your pro mix is water it let sit a day then water again to run off.Check the ppm of it,see how salty it is.
My self just start new,4cu/ft is what$20.

Yeah, it's more a matter of having too much earth laying around, always an option tho

Toss the pro mix... Buy one bag of Fox farms oceanforest.... One bag of mushroom compost.... 5 lb of organic worm castings.. amend with your choice of organic dry nutrients such as Earth dust or gai green. The soil must cook together for several weeks to be optimal.basically that just means mixing it around and letting the organic microbes begin to do their job. You can also use products like recharge to inoculate your soil and get this process going faster. My first grow was with pro mix and chemical nutrients I hated all the work. Just had my best yield on my second round on organic soil. The best thing is the more you use the same soil over and over the better it gets.

DoobieDoobs said:

Yeah, it's more a matter of having too much earth laying around, always an option tho

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Build yourself a big ass compost pile.

hey guys, just letting everyone know how I ended up doing my soil mix. Where I live there is no Fox Farms, Gaia Green, Dr. Earth, any of those, I would have to spend a little bit more to have them sent over, which I didnt do xD, nevertheless I did look for the ingredients in those soil mixes and amendments. I have been reading, and watching videos about soil, and I think I ended up with a mix that will cover the basic needs. I did flush my pro mix, I flushed it good no doubt, and I bought compost and earthworm castings that were availale locally, in Home Depot. I also bought, in a webpage called Grow Depot México, a set of organic amendments, that contained Bone meal, Fish meal, water-soluble seaweed extract, Mycorrhizae, Zeofert (npk of 3,9,2 also has micronutrients and the texture is like flour), and leonardite, and I bought in addition to that a bottle of fish emulsion.

I used:

15 liters of promix all purpose mix
5 liters of perlite
6 liters of compost
4 liters of earthworm castings
6 tbsp of Fish meal
6 tbsp of Bone meal
6 tbsp of Fish meal
6 tbsp of Leonardite
3 tbsp of Zeofert

Right now making a compost pile is not feasible, when I get the space to do it I am going to since its such a good idea. I included a lot more promix that the other one I wrote as someone suggested, it does have a good texture I like it. And hopefully in the future ill get more amendments but I think I can do fine with what I have right now, plus ill be watering wih seaweed and ill use the fish emulsion in the compost tea during vegetative phase.

What do you guys think? Ill post an update if my plants ended up alright or if it went all down the drain. Here is a photo of how it ended up looking.

myke said:

A good way to check your pro mix is water it let sit a day then water again to run off.Check the ppm of it,see how salty it is.
My self just start new,4cu/ft is what$20.

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Damn. Would love to know where you get promix bale for 20$

green_machine_two9er said:

Damn. Would love to know where you get promix bale for 20$

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Sorry plain peat is $20,Im in Canada, Pro mix is $35 at my local garden centre.

Fatleg77 said:

Toss the pro mix... Buy one bag of Fox farms oceanforest.... One bag of mushroom compost.... 5 lb of organic worm castings.. amend with your choice of organic dry nutrients such as Earth dust or gai green. The soil must cook together for several weeks to be optimal.basically that just means mixing it around and letting the organic microbes begin to do their job. You can also use products like recharge to inoculate your soil and get this process going faster. My first grow was with pro mix and chemical nutrients I hated all the work. Just had my best yield on my second round on organic soil. The best thing is the more you use the same soil over and over the better it gets.

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You can literally do the same recipe with promix instead of ffof and it would be perfect and would save some money too

P10p said:

You can literally do the same recipe with promix instead of ffof and it would be perfect and would save some money too

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Thats fair