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Old 06-09-2013, 02:03 PM   #1
Cirsium's Avatar
Join Date: Nov 2008
Location: Midwest
greenthumb Organic Potting Mix Basics

Organic Potting Mix Basics

Cooperative Extension System and your Local Institution
eOrganic author: Michelle Wander, University of Illinois
February 03, 2012
This article covers basic information about organic potting mixes for organic farming systems. It includes an overview covering the kinds of media (compost, peat, and manure-based materials) commonly used, potting mix test information, and information on how to make and use organic potting mixes in your organic greenhouse operation. It also summarizes basic organic potting mix recipes and provides tips on how to handle materials.
Soil or potting mixes used to start seed must be very light, have high water- and air-holding capacity and be free of disease and weed seeds. Planting mixes containing soil can be blended with peat, humus, compost, and/or manure with approved additives intended as soil conditioners and/or organic fertilizers. ...
"We abuse land because we regard it as a commodity belonging to us.
When we see land as a community to which we belong, we may begin to use it with love and respect."
Aldo Leopold

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Old 06-09-2013, 02:53 PM   #2
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Join Date: Feb 2010
Location: Kentucky

Thanks Circium!

I think I posted this link (from UVM, my alma mater ) in a thread about soil mixes, I can't remember which one. I was a Plant and Soil Science major there. We played around in the greenhouses a lot and made huge batches of soil mix for trials. It was way more fun than being in a classroom.

This is really thorough and informative stuff for anyone wanting to make their own soil mixes. Sterilization for those that want to avoid damping off in seedlings is another story but still doable DIY.
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basics, compost, humus, manure, mix, organic, organic fertilizer, potting, potting mix, soil, soil mix

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