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Dendrobium cuthbertsonii

Discussion in 'Orchid Species' started by Alexey, Jul 1, 2016.

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  1. Alexey

    Alexey Well-Known Member Supporting Member

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    Den cuthbersonii 2016 01.jpg Grown in greenhouse which has no cooler. Root zone temperature management is provided by evaporative cooling of the constantly moist lava rock in the second (biggest) pot.
     
    Last edited: Jul 1, 2016
    jai, pontupo, scruffy and 1 other person like this.
  2. spiro K.

    spiro K. Active Member

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    great idea Alexey!I cant grow this beauty here in NY, too hot in summer.
    Great looking plant by the way!
     
  3. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Nice blooming and interesting cultural technique! Thanks.
     
  4. sam1147

    sam1147 sam1147

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    Very well done and a great idea!!!!
     
  5. scruffy

    scruffy Member

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    Really like your creativity!
    Thank you!
     
  6. pontupo

    pontupo Member

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    Very nice!!

    How do you maintain the constant moisture of the lava rock?
     
  7. KellyW

    KellyW Orchid wonk Staff Member Supporting Member

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    Alexey, just wondering if you have tried this with a terracotta outer pot?

    Nice growing.
     
  8. Alexey

    Alexey Well-Known Member Supporting Member

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    Chris, the setup is sitting in the saucer with water. Layer of lava rock at the bottom of the outer pot keeps inner terracotta pot above the water table. Outer plastic pot has holes drilled just above the water level to allow free air circulation trough the lava rock around inner pot and through the inner pot itself. Air circulation supplies fresh air to the root zone and keeps temperature of lava rock, terracotta pot and root zone lower than ambient temperature.
     
    Last edited: Jul 9, 2016
  9. Alexey

    Alexey Well-Known Member Supporting Member

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    Kelly, I have not tried it. Perhaps setup with two terracotta pots would give even better temperature gradient. The only possible issue is air stagnation at the root zone (see reply above to Chris). To prevent stagnation, outer pot shall be a classical terracotta pot for orchids with openings on its side.
     
  10. Korina

    Korina Member

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    I just discovered that terra cotta drills like butter. I put holes in some saucers for mounts, and used a tile bit in my hand-cranked craft drill with moderate pressure; the holes are perfect. HTH.

    Also, that's one good looking plant. Good on ya! :)
     
  11. pontupo

    pontupo Member

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    Thanks, Alexey! I'm definitely going to give this a try!