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Cattlyas not flowering

Discussion in 'General Chat' started by JPL from BK, Jan 14, 2020.

  1. JPL from BK

    JPL from BK New Member

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    I have about 12 Cattlyas and although they seem healthy and have good flower sheaths, only about half actually flower. I am in Tropical North Australia (4metres of annual rainfall) I keep a fan running in the orchid house all summer. Any ideas?
     
  2. Ray

    Ray Orchid Iconoclast Supporting Member

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    Insufficient light?
    Insufficient food?
    Too much nitrogen?
     
  3. Arne

    Arne Member

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    When my Cattleya plants don’t flower it’s either because of insufficient light or because of lack of pronounced day/night variations. Long warm summer days can be a disaster for some Cattleyas.
     
  4. JPL from BK

    JPL from BK New Member

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    Thank you for your replies. The food I give them is a Searles 'Orchid Booster' NPK is 8/2.5/14. Is that about right? I water every 6-7days and Fertilise every second watering.
    Also - There is some artificial light all night. I have just moved them to another area.
     
  5. Ray

    Ray Orchid Iconoclast Supporting Member

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    How much fertilizer per gallon?

    How much light does it get in the daytime? I assume it’s in a window, so what direction does it face?
     
  6. Ricardo

    Ricardo Slave of demanding bird

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    The plants sold as "Cattleyas" nowadays can have all sorts of ancestors and therefore even if they look similar, they can have different needs. If you know the name of your plants that could give a clue to their needs.
     
  7. Roberta

    Roberta Member

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    The mention of exposure to light all night jumps out at me as a possible factor. Some Catts really need a dark period at night, and may not bloom if they don't get it. Some are less fussy. So possibly, all other things being equal, the ones that are less in need of a dark night may have been the ones that bloomed. If they have been moved to an area that doesn't get light all night, that could help for some of those.
     
  8. JPL from BK

    JPL from BK New Member

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    1 I do not know how many ppm of the various chemicals are in each litre (or gallon) I just follow the instructions.
    2. They are now in a covered work area between my workshop and the forest. They are under a 20% plastic roof and get good sun from 0900 to 1600.
     
  9. JPL from BK

    JPL from BK New Member

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    I was given all my orchids by a gentleman who was 'elderly' they were in por condition with no labels.
     
  10. Ray

    Ray Orchid Iconoclast Supporting Member

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    I am not asking the ppm. What is the formula (%N, P & K), and how much (g, ml, teaspoons, whatever) do you had to a liter or gallon of water.

    You asked for help, but seem hesitant to share the facts we need to do so.
     
  11. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Ray, he did give the NKP. "The food I give them is a Searles 'Orchid Booster' NPK is 8/2.5/14."
     
  12. Ray

    Ray Orchid Iconoclast Supporting Member

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    Hah! Laughs on me then, and I apologize. I really SHOULD wake up before responding!

    However, we still don't know how much is used per liter... My recommendation would be 1.3ml/L.
     
  13. JPL from BK

    JPL from BK New Member

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    I did give you the NPK %. I use 40ml/9litres. The label does not give the elements concentration
     
  14. AnonYMouse

    AnonYMouse aka Ree, the not-so-stealthy lurker

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    JPL,
    Ray has a website that is very informative, if you care to read up. If you don't have the time, he has fertilizer calculators that does the math for you.
    Welcome to First Rays! » First Rays LLC
     
  15. Ray

    Ray Orchid Iconoclast Supporting Member

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    That much of an 8%N formula is applying about 350 ppm N, which is a LOT of nitrogen. I’d recommend no more than 100-125 ppm N weekly. Excessive nitrogen can lead to great growth, but definitely can quash blooming.

    The “dosing factors” of any fertilizer formula are 10.4/%N on label give ml/L for 100 ppm N and 13/%N gives ml/L for 125. With your fertilizer, I would use about 13 ml/9L