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hellkitchenguy

Sans in pumice always rot

9 years ago
last modified: 9 years ago

I have my Hahnii type Sans in a mix of about 2/3 pumice and 1/3 non peat soil. They seem to rot more easily than the ones in regular potting soil.

I've had six Sans rot in this mix.

Comments (16)

  • 9 years ago

    Hey Manuel,

    Can something be rotten in the soil? I assume the pumice was inert, nothing can be rotten in it.

    Sorry Manuel, I see what a bummer!


    hellkitchenguy Manuel thanked Karen S. (7b, NYC)
  • 9 years ago

    The soil part is from RepotMe. Looks very clean to me. It's a good mix and I use ceramic pots. Maybe they're terracota. I never bothered to learn the difference

  • 9 years ago

    How well are your other sans doing? I hope I'm wrong but maybe something else may be happening here? May be a fungus disease? Try to order on line some Captan, or sulfur for plants to add to your watering schedule. Only time I had this problem was in too cold/wet conditions. Keep over 60 degrees if possible. I try to keep mine at 70 to 80 all winter long.

  • 9 years ago
    last modified: 9 years ago

    Stush, I did notice this morning that one of them has some little things on them that I can scrape off. I'll take a picture tonight. This is only affecting my dwarf types. One of the affected ones has a healthy baby that I'm going to try to save. Should I try 100% Pumice or just regular soil without pumice.

    Maybe they got too cold. I kept them outside until the temperatures dipped below 50. I would bring them to sunlight as long as the temperature was 50F or above, and would bring them in after dark

  • 9 years ago

    Hi Again Manuel,

    I'd sooner try pure pumice than pure soil, I think it'll fare better due to the better drainage it'll get in pure pumice.

    I can't get to the 14th St Market as I work all week days (I don't come in on wknds).

    Can you pls. ask them if they carry any pure pumice? If so could you buy me a bag & I'll arrange to reimburse you. TIA = thanks in advance.

  • 9 years ago

    They don't really carry anything except some huge bags of standard peaty soil. They don't carry any type of grit, pumice, etc

  • 9 years ago

    This is a closeup of the damaged plants


    Those little brown things are not alive, but they can be scrapped off

  • 9 years ago
    last modified: 9 years ago

    Manuel, these are insects from the family Diaspididae.

    hellkitchenguy Manuel thanked Liberyx (Poland 7a)
  • 9 years ago

    Hello, I think those are scale insects as seen here. You will have to use a good systemic treatment to eliminate them. I would advise to quarantine affected specimen asap, those beasties are very difficult to get rid of, you don't want to contaminate your other plants.

    Savantfou.

    hellkitchenguy Manuel thanked Savant Fou (France - zone 7)
  • 9 years ago

    Liberyx and Savant Fou, I'm throwing those plants out, along with the mix. Also going to order a systemic through Amazon and going to treat ALL my plants. Thanks.

    Woodnative, I'm going to stop taking them outside so frequently, even in good weather. Just going to place them on my north facing living room window. It doesn't get much light, but they will have to make do.

    Thanks everyone

  • 9 years ago
    Blowing up the pic that is certainly scale there. Good on the systemic. Nothing wrong with putting them outside in summer for a bit they thrive there in the warmer months though should be fine on the window too. Here is a silver frost outside until October. Some blemishes because of that but the plant is healthy and pumping.
    hellkitchenguy Manuel thanked woodnative
  • 9 years ago

    Woodnative, I didn't get burn marks because I had the on a side of the roof where they got morning sun until around noon. After that it was bright shade

  • 9 years ago
    last modified: 9 years ago

    Sorry for the confusion on marks I was just referencing your statement above. "Maybe they got too cold. I kept them outside until the temperatures dipped below 50." I am just saying that a little cold or sun would not cause that type of damage but it seems the damage in this case was probably from the scale anyway. After the systemic etc. I am sure it is fine to treat them otherwise like you were doing in the past.

    hellkitchenguy Manuel thanked woodnative
  • 9 years ago

    Woodnative, now I understand what you meant more clearly. Thanks

  • 9 years ago

    Manuel, I purchased a gallon of imidacloprid on line from Home Depot at a fraction of the cost of common name brands. Picked up at store. A gallon should last a life time at how much you dilute it. Also spray with cheap dollar store mouthwash helps. I would keep the plants and keep them away from the others. They may survive.

    hellkitchenguy Manuel thanked Stush2049 Pitts. PA, zone 6
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