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Offlinemill
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50/50 + Gypsum volume question for panaeolus and Galindoi
    #14381062 - 05/01/11 02:28 AM (12 years, 10 months ago)

Hello all,
I have troubles to find the right way to buffer my 50/50+ mix.
Made a lot of searches on the board and lots of different ways to do it.
I just have gypsum (plaster of paris grinded in powder). The lime i recently bought, simply burnt my trays :frown: I'd like to buffer this 50/50+ casing soil with only gypsum. RR suggest to use calcium carbonate to 5% and gypsum to 10% by volume.
What if i then only use gypsum ? Should i increase the gypsum volume ?
Any successful grow with only gypsum ?
Advices are much appreciated :thumbup:

Oh and by the way, this casing soil will be used for panaeolus and for Ps Galindoi. I'm actually fruiting Galindoi with a 50/50 peat/verm and have no fruits. The tray is in the fruiting chamber since 1,5 month now lol. I tried different fruiting parameters without any success for now.
Thanks in advance for your help !

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OfflineRogerRabbitM
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Re: 50/50 + Gypsum volume question for panaeolus and Galindoi [Re: mill]
    #14381514 - 05/01/11 06:58 AM (12 years, 10 months ago)

Gypsum isn't for adjusting pH.  Use hydrated lime.  It doesn't 'burn' trays.  Use no more than a teaspoon of hydrated lime per cup of peat.
RR


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Offlinemill
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Re: 50/50 + Gypsum volume question for panaeolus and Galindoi [Re: RogerRabbit]
    #14381605 - 05/01/11 07:54 AM (12 years, 10 months ago)

Thanks :thumbup:
The term "burnt" was prolly inapropriate indeed.
here is what i used as lime :
Powdered form
92% CaO in oxyde calcium form
1% MgO in oxyde magnesium form

I added around a teaspoon, even less, if i remember well and very few fruits grew from those trays while the others were full of shrooms.
I dont find what im doing wrong.

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