SQWIB
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Joined: Tue Feb 16, 2016 2:21 pm
Location: Zone 7A - Philadelphia, PA

Testing a new potting mix

Testing a new potting mix for my indoor garden. The Bio-char is being added for water retention and nutrient retention and to reduces soil acidity decreasing liming needs.
If this works out, next fall I will be adding my city compost from the recycle center.

Used this mix for the 1 gallon pots and one grow bag, marked w/red tape
  • 2 bucket (3 gallons) peat moss
  • 1 bucket (2 gallons) Perlite
  • 1 bucket (2 gallons) Black Kow composted cow manure
  • 1 bucket (2 gallons) Coffee grounds
  • 1 bucket (2 gallons) Bio-char
  • 1 cup pelleted time-release fertilizer (osmocote plus) (6 scoops)
  • 1/4 cup of Blood Meal
  • 1 cup lime (to counter the acid of peat and keep the pH level near neutral

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rainbowgardener
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Location: TN/GA 7b

Re: Testing a new potting mix

I haven't done it lately, but I used to make an eco friendly potting soil for seed starting/ seedling growing:

A basic potting mix recipe goes like: compost or something organic that supplies texture and nutrients, something to keep it fluffy and moisture holding, something mineral or gritty to promote drainage, more or less thirds of each. In my quest for eco-friendly sustainable potting mix, the recipe I have come up with is mushroom compost (left over from growing mushrooms), coconut coir (outside fuzzy stuff from coconuts) instead of the peat moss that people often use, rice hulls (left over from milling rice) instead of perlite or vermiculite. All of this is agricultural by-products and all but the coconut coir can be fairly locally sourced. None of it is mined, heated to high temperatures or otherwise environmentally destructive to produce.

So I think it is very eco-friendly. It turns out that it is not as nitrogen rich and maybe generally not as nutrient rich as the Miracle Gro potting soil I used to use. So I need to supplement it a bit. Things I have used include soaked alfalfa pellets, aerated compost tea, seaweed fertilizer, etc. I still need to keep tweaking this part a bit.
Twitter account I manage for local Sierra Club: https://twitter.com/CherokeeGroupSC Facebook page I manage for them: https://www.facebook.com/groups/65310596576/ Come and find me and lots of great information, inspiration

SQWIB
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Posts: 930
Joined: Tue Feb 16, 2016 2:21 pm
Location: Zone 7A - Philadelphia, PA

Re: Testing a new potting mix

My new potting mix hasn't killed anything yet.
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PaulF
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Location: Brownville, Ne

Re: Testing a new potting mix

I'm just too lazy to start mixing my own mix. For twenty years I have been using commercial potting mixes with success. No need to experiment now. So long as I go for the more expensive and better known mixes I have no problems. I have used cheap-o brands and they have too many rocks and dirt clods and do not perform as well.

Homemade mix would be fun to mess with, but like I said, I am just too lazy.
Paul F

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