For the potting mix, I'm going with the so-called 5-1-1 mix, made popular on the Gardenweb container forum: http://forums2.gardenweb.com/discussions/2842847/container-soils-water-movement-and-retention-xxii?n=127 This is a long read about how water retention in soils works, and changed the way I think about containers.
The main ingredient for the 5-1-1 mix is pine bark fines, which are < 1/2" bits of pine bark, and they're really hard to find. After 2 years of searching, I finally found the mother lode at Pioneer Sand in Boulder.
I ran about 16 cu ft through a 1/2" screen, and about 99% made it through. If I were to do this again, I'd say you don't need to screen it, but I probably would anyway because I'm that kind of guy.
16 cu ft cost me $35. That's cheap, if you've ever priced potting mix.
Screening a bag of peat.
All ingredients are ready to assemble the mix. Pine bark fines, peat, perlite, garden lime, and controlled release fertilizer.
150 gallons of potting mix, ready to receive peppers and tomatoes, if it ever stops raining!
Dude, I see money in your pine bark!
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ReplyDeleteI started to screen but realized quickly it wasn't worth it so my selectively lazy radar went off and I skipped that step. Also, another weird thing is one bag of peat moss was supposedly 3ft^3 or 22 gallons, but i got all 30 gallons out of it?!? Does it yield more because it's out of the compressed bag and more "loose"?
ReplyDeleteI think so. My pile of peat was almost as big as my pile of pine bark after I ran it through the screen! I'm used to bags of soil containing less than they claim due to settling, not the other way around.
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