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Thread: N. northiana soil question

  1. #1

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    N. northiana likes alkaline soil.

    Unfortunately, I can't find a piece of pure limestone 'round these parts to stick it on (I love in a desert for those who don't know). Right now, my northiana is potted in a sphag/perlite mix in a 3.5 or 4inch pot (haven't measured). I bought some horiticultural lime to correct the acidity situation, but how much should I use? The bag obviously 1) doesn't have instructions for nepenthes, and 2) is only for large scales, like 5lbs per 500 sq. ft.
    Z polski y dumny
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    Nepenthes Specialist nepenthes gracilis's Avatar
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    I keep wondering who has passed this false and incorrect information around.

    DO NOT believe this. N. northiana does NOT need any lime/alkalinity in its soil mix. Plant in a regular Nepenthes mix,maybe a bit more stony/gritty, thats it though. Alkaline can stunt its growth habit.

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    Stay chooned in for more! Clint's Avatar
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    Quote Originally Posted by [b
    Quote[/b] (nepenthes gracilis @ Sep. 27 2006,8:22)]I keep wondering who has passed this false and incorrect information around.
    Peter D'amato, for one.

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    or perhaps the person for whom the plant is named...who painted it multiple times in its natural habitat - pure limestone cliffs...

    Also the CP listserv had a conversation about N. northiana and boschiana requiring alkaline soils. In fact, once the grower in question made the northiana soil more alkaline, it started growing a LOT better. I think I deleted that though, so if anyone has it, feel free to post it
    Z polski y dumny
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    Stay chooned in for more! Clint's Avatar
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    Believe it or not, it's possible for acidic soil to be on top of alkaline rock.

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    so....hydrated lime treatment or no?
    Z polski y dumny
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    Stay chooned in for more! Clint's Avatar
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    I would plant it in standard nepenthes medium. Add some of those orchid expanded clay things if you want. I wouldn't use anything alkaline.

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    oops! I found the convo, apparently the guy tried the boschiana in a different soil, not the northiana, but:


    Quote Originally Posted by [b
    Quote[/b] ]
    I saw two _N. boschiana_ in cultivation, growing in normal _Nepenthes_
    soils. One plant looked quite happy, the second less so, but not suffering
    any disease. I have now put the second plant into a limestone _Nepenthes_
    mix (using crushed limestone--to hopefully maintain good granulation--which
    is half Ca and half Ma carbonate). I suspect it will like this soil and
    grow faster than it had been. I really doubt it will hate this type of
    soil, as this species appears to grow directly on limestone in the wild.
    Wish me luck with it

    _N. campanulata_ appeared slightly diseased to me in normal _Nepenthes_
    soil. The leaves would not stay green and they would barely pitcher. They
    seemed to be suffering from several nutrient deficiencies. Feeding insects
    did help, but not enough and there were almost no pitchers to feed. I added
    hydrated lime (the white powdery stuff, pure Ca carbonate) directly into the
    top layer of soil in the pots without repotting and worked it into the soil
    at the base of the plants and around the roots. The top layer of soil
    became dense like concrete (barely any granulation), but the plants love it
    and are no longer diseased. This stuff looks identical to the soil _N. c._
    is naturally found in (except for the lack of granulation). I know, I saw
    photos of it and read C. Lee's description of it in Discover magazine and it
    was very easy to make.

    I have not tried _N. northiana_ in a limestone mix yet as I am out of
    healthy plants to experiment with. Thomas has a couple and will repot them
    into the soil I used on the _N. b._ soon. BTW, the _N. n._ appears to be
    suffering in the same way as the _N. c._ had been previous to using the
    hydrated lime--no pitchers, not getting any larger--nutrient lockout.
    Z polski y dumny
    Prayer - how to do nothing and still think you're helping.
    http://www.youtube.com/watch?v=5F5aCUNE4Z8
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