vermiculite....good or bad?

Hopesndreams(5)May 16, 2012

Is vermiculite good or bad to use in a succulent mix? I want to make sure I make the right mix for my plants. Just confused on what I should be using after reading so many posts. I have a huge bad of vermiculite and am hoping it would be good at add to my potting soil.

Thanks!

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Microthrix(9)

Umm isnt that what they use for plant mix at the stores? If so i wouldnt use it ... since cacti like to dry out between watering it dries up and forms a block that doesnt absorb and more water and it just washes by it ... and then your cactus never recieves water again ...

    Bookmark   May 16, 2012 at 11:46PM
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Microthrix(9)

Or maybe im Thinking of peat ... but heres a link to a similar post ...

Here is a link that might be useful: other post

    Bookmark   May 16, 2012 at 11:52PM
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Beachplants(Z11)

I have used perlite and vermiculite for many years. I prefer large grain perlite, as vermiculite can have various effects on soil pH. I do not use more than say 20% if I use it. It does help with aeration insulation, but degrades quicker than perlite I believe. Here is a link that would require some reading, but there is lots of info.

Here is a link that might be useful: Perlite & vermiculite

    Bookmark   May 17, 2012 at 12:09AM
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Microthrix(9)

Woah beach where do you even start on that o_o

    Bookmark   May 17, 2012 at 12:19AM
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hanzrobo(11)

Very informative link, Rian. I've been told that vermiculite is a fine addition to soil when used as Rian suggested. I don't use it only because it's much more expensive than other materials available.
Many of us mix our own soil and everyone does it a little differently. You can try to follow the 'gritty mix' guidelines but I haven't been able to acquire all the ingredients.
What I do is to sift all the fines out of each of my components with a large wire strainer. I start with either bagged cactus soil or regular potting soil. I add volcanic pumice and Napa oil absorbent, together making up about 50%. After sifting our all the fines, this mix is a little too gritty, a little rough in my opinion. I like to add fines back into the mix in the form of coco peat which does not become hydrophobic. I don't add much, but enough to add some buffer between all the sharp grit. I don't really measure anything, just shoot for a certain texture.

    Bookmark   May 17, 2012 at 12:35AM
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cactusjordi(z10 CA)

I think at Uline the Vermiculite is not too expensive. Because such a 4 cu. ft. bag makes a lot of soil mix.

Jordi

Here is a link that might be useful: Vermiculite

    Bookmark   May 19, 2012 at 12:10AM
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hanzrobo(11)

Thanks Jordi! I have their catalog!

    Bookmark   May 19, 2012 at 12:16AM
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