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Tightly sealed flask

This is a discussion on Tightly sealed flask within the Flasking Equipment & Technique forums, part of the Orchid Propagation category; After one (1 ) week, I observed that my homemade sowing medium is free from ...

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  1. #1
    phytogems is offline Junior Member
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    Question Tightly sealed flask

    After one (1 ) week, I observed that my homemade sowing medium is free from contamination, thus I plan to sow my orchid seeds. My question is, should I seal the flask tightly? What happened to the cultured inside the flask if there is no air/oxygen? Anybody can advise me what to do.

  2. #2
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    jeffrey6115 is offline Senior Member
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    For initial protocorm developement no oxygen exchange is necessary. I only add a "breather" when I replate. I have some mother flasks that have original plants that are almost 2 years old. They still look fine. I have opened them only to remove plants for replating then closed again with original lid.

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    Brutal_Dreamer is offline Dreaming with my eyes open...
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    Quote Originally Posted by jeffrey6115 View Post
    For initial protocorm developement no oxygen exchange is necessary. I only add a "breather" when I replate. I have some mother flasks that have original plants that are almost 2 years old. They still look fine. I have opened them only to remove plants for replating then closed again with original lid.
    Thanks for the information. I wondered about this before and thought maybe they made their own oxygen since most are sealed up to keep our pollutants.

    Cheers,
    BD

  4. #4
    GrumpyBear is offline Senior Member
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    i've been under the assumption it's carbon they need and i thought that's what's up with the charcoal in the medium... what do i know tho, my only attempt at flasking successfully grew disgusting fuzz in large quantities.

    ...anyone need some fuzz?

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