JM potting mix for Arkansas

mylespickett(8a)June 23, 2012

Hello everyone, I was told I would find some helpful info in this particular forum. I have purchased quite a few JMs over the past year (about 35 actually) and have tried to create a mix for potting all of them up and would like a little helpful evaluation and advice on what I'm doin right or wrong or if I am missing anything... But also if I could go with out a certain ingredient (always trying to save a buck$$). I will paste my original post below. Thanks for any help or advice!

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Well I just registered to the forum after reading and reading... And reading. It seems not a lot of growers occupy my area (little rock, Arkansas). I've learned of so many types of soil mixtures for containerized JMs. My question though being- is there any professional advice on a soil recipe for containers in my area... My very humid and hot and crazy weather region.
I have many maples right now in a mix I have made including:
6 parts sifted pine bark mulch
4 parts expanded shale
3 parts earthworm castings
2 parts sphagnum peat moss
Used coffee as top dressing a couple times a month
Oh and a lil perlite to taste...

    Bookmark   June 23, 2012 at 7:29PM
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tapla (mid-MI z5b-6a)

Nothing terribly wrong other than the fact that the worm castings are unnecessary and counterproductive because they limit the soil's potential aeration - nothing in them you can't get from a soluble fertilizer, w/o the negative impact on drainage/aeration. Also, coffee grounds aren't such a good choice as a fraction of container soils OR as a top dressing/mulch .... and I'm thinking it would have been wise to have included dolomitic (garden) lime in your soil, too. 1/3 - 1/2 cup per cu ft is about right.


    Bookmark   June 23, 2012 at 9:33PM
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Awesome!!! Good to know for this next repotting. I had no idea the worm castings would have that effect on aeration. As far as fertilizer is concerned I've been using happy frog (fox farm) JM fErtilizer 4-8-5. I've been fertilizing about 2 tablespoons a month for my younger trees and about twice that for my trees in 5 gallon pots and larger. I've been told not to over fertilize so I think I'm right on that? Can you or anyone suggest a better fertilizer/fert. Regimen. Thanks for the advice Al! I'll add some lime on my next repot and nix the castings.

    Bookmark   June 24, 2012 at 10:28AM
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