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Lime substitue

Posted by bondo2 11 Egypt (My Page) on
Wed, Jul 10, 13 at 7:01

Hi,

I made my own self irrigated pots (like earthbox or earthainer) and and am using peat moss for medium but I have no access to lime to add to it. I am thinking of 2 alternatives but I need help:
1. Granite/marble powder
2. Crushed sea shells (just those regular shells found on the beach)

Would they work ?


Follow-Up Postings:

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RE: Lime substitue

just straight peat ?

BZ


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RE: Lime substitue

Peat and perlite mixture


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RE: Lime substitue

You coud use gypsum for calcium, and epsom salts for magnesium, in place if the lime. What are you planning on growing?


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RE: Lime substitue

I like to grow mostly tomatoes, bell peppers, coriander and parsley. I don't have gypsum, how do I use the epsom with this setup ?.
I understand that lime is also to fix the PH of peat, am I correct ?


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RE: Lime substitue

Lime = Calcium + Magnesium
Gypsum = Calcium
Epsom Salt = Magnesium

Thus, the Gypsum + Epsom Salt are required to provide both elements found in the Dolomitic Lime.

Lime does raise the pH of a mix, yes.

Josh


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RE: Lime substitue

How much should I add to my peat ?
Isn't granite powder the same ?
Is gypsum the same used in plaster ?


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RE: Lime substitue

yes same as plaster, but 99.9% of plaster used in building has additives in it to help it set etc..so I wouldn't use that for plants.

granite powder may have some K in it depending where it comes from after a quick google.

as for how much gypsum to use I wouldn't go overboard start out with the tablespoon a gallon and see how it goes.

BZ


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RE: Lime substitue

But all that won't fix the acidity of Peat


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RE: Lime substitue

Do you have any woodashes?

Josh


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RE: Lime substitue

Not really but I have coal (wood), would that work ?


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