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  • 1 Post By brit6v
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  • 1 Post By stateless
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  • 1 Post By brit6v
  • 2 Post By wolf71758

lava rock or hydroton?

This is a discussion on lava rock or hydroton? within the General Orchid Culture forums, part of the Orchid Culture category; Hello everyone, I've been thinking about repotting all of my catts in either hydroton or ...

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  1. #1
    brit6v's Avatar
    brit6v is offline Senior Member
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    Default lava rock or hydroton?

    Hello everyone,
    I've been thinking about repotting all of my catts in either hydroton or lava rock when each of their re-pot times rolls around. For those of you who have potted with both, which do you prefer and why? I would be moving my plants from a bark mix.

    I would appreciate your help!
    Vicki

  2. #2
    ksriramkumar is offline Senior Member
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    Planning to grow them semi hydrophonic or normal?. I grow my cattleyas in semi-hydrophonic with hydroton with reasonable success.

  3. #3
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    I would suggest which is readily available, when needed. I am using Pumice, because Hydroton is hard to find and expensive.

  4. #4
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    I grow all of my orchids indoors in a mix of lava rock and orchiata - differing ratios depending on the variety. Catts usually in ~80% lava rock - watering roughly once a week this gives excellent drainage but small amount of moisture retention.
    Posted via Mobile Device

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    Default ksriramkumar

    I plan to grow them the usual/normal way, not S/H this time. I have 8 various plants in S/H, including 3 catts and have had generally good success, but I decided to re-pot these two the regular way.


    Quote Originally Posted by ksriramkumar View Post
    Planning to grow them semi hydrophonic or normal?. I grow my cattleyas in semi-hydrophonic with hydroton with reasonable success.
    ---------- Post Merged at 03:59 PM ----------

    Thanks, Jervis
    Vicki

    Quote Originally Posted by chingjervis View Post
    I would suggest which is readily available, when needed. I am using Pumice, because Hydroton is hard to find and expensive.
    ---------- Post Merged at 04:08 PM ----------

    I'm going to read about orchiata because I am not familiar with it.
    Thanks for your help, Bob...
    Vicki

    Quote Originally Posted by wolf71758 View Post
    I grow all of my orchids indoors in a mix of lava rock and orchiata - differing ratios depending on the variety. Catts usually in ~80% lava rock - watering roughly once a week this gives excellent drainage but small amount of moisture retention.
    Posted via Mobile Device

  6. #6
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    All my plants are in hydroton ,the reason only I bought a big bags and I don't like to repot so often.i have both in S/H and normal way.

  7. #7
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    Default

    I grow outdoors and use a hydroton mix, hydroton, charcoal and a little tree fern mixed together, plants seem to love it. That said I do use lava rock in a pinch and plants do fine, I've heard lava rock can retain the fertilizer and you get a white build up which is why I try to avoid using it.

  8. #8
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    Default

    There are really only a couple of potential concerns with lava rock, chemistry and crud buildup.

    Being a natural product, the chemistry of the rock is determined by what was melted underground by the magma surging upward, and that can affect the pH of the root zone.

    Like Stateless, I have seen it build up minerals and plant wastes pretty quickly, and unlike LECA, it is near to impossible to clean. However, if you have a plentiful, cheap supply, and can replace it often enough, so what?

  9. #9
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    Thank you, Kitty...
    Vicki

    Quote Originally Posted by k_andreev View Post
    All my plants are in hydroton ,the reason only I bought a big bags and I don't like to repot so often.i have both in S/H and normal way.
    ---------- Post Merged at 04:15 PM ----------

    Thanks, stateless...
    Vicki


    Quote Originally Posted by stateless View Post
    I grow outdoors and use a hydroton mix, hydroton, charcoal and a little tree fern mixed together, plants seem to love it. That said I do use lava rock in a pinch and plants do fine, I've heard lava rock can retain the fertilizer and you get a white build up which is why I try to avoid using it.
    ---------- Post Merged at 04:16 PM ----------

    Thank you, Ray...
    Vicki



    Quote Originally Posted by raybark View Post
    There are really only a couple of potential concerns with lava rock, chemistry and crud buildup.

    Being a natural product, the chemistry of the rock is determined by what was melted underground by the magma surging upward, and that can affect the pH of the root zone.

    Like Stateless, I have seen it build up minerals and plant wastes pretty quickly, and unlike LECA, it is near to impossible to clean. However, if you have a plentiful, cheap supply, and can replace it often enough, so what?

  10. #10
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    Default

    Vicki,
    Here's a photo of a cattleya that I have in a lava rock/orchiata mix. Last repotted in December 2012. Orchiata has held up well and I don't plan to repot after this round of blooms either. I water in the kitchen sink so the media is well rinsed and I don't experience the build-up on the lava rock mentioned above... greenhouse watering might have different results.

    Bob

    Name:  Lava Rock - Orchiata.jpg
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