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Dendrobium hellwigianum

Discussion in 'Orchid Species' started by pacome, Jul 20, 2009.

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  1. pacome

    pacome Active Member

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    3 clones, quite an easy grower, and very willing to breed!

    the last picture is of cut flowers photographed on a white background, showing the so elusive bluish tint of some clones of that species. I hope to get some deeper blue flowers by crossing two bluish clones...
    Dendrobium hellwigianum Kopf1 juin2008(1).JPG Dendrobium hellwigianum 3 ecua avril 2009.jpg Dendrobium hellwigianum 4 Ecua octobre 2008 bis.JPG Dendrobium hellwigianum Warren.jpg
     
  2. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I have a couple of blue clones, but interestingly, when a friend grows them under lights, they aren't blue.
     
  3. Tom_in_PA

    Tom_in_PA I am not an addict

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    on a roll today :D
     
  4. pacome

    pacome Active Member

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    probably a lack of enough day/night temperature differential, as well as lower light level, could explain the lack of bluish hue, I think.
     
  5. pacome

    pacome Active Member

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    Those pictures are not necessary of the current bloomings;) but I promise, all the plants showed are still alive:D
     
  6. Alexis

    Alexis New Member

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    Very nice!
     
  7. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I think his light is more intense than in my greenhouse.
     
  8. pacome

    pacome Active Member

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    wow! I can't imagine his electric bill!
    maybe a question of temperature then? I remember , 2 years ago , before I had my actual greenhouse, I also grew under lights, and my hellwigianum were of a much poorer coloration. temperature hardly went below 15°C, and I know many cool growing species put smaller and less colored flowers when grown with not so cold nights (as Dendrobium VR, or Masdevallia coccinea for example)
     
  9. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    His temperatures definitely get down at night. He has lots of oxyglossums and they bloom fantastically well, compact plants, bright colors, lots of flowers. It is a small grow space and he stays with miniatures, so he probably pays a fraction of what I do. Sometimes I want to try lights to see if I can get such good results.;)
     
  10. pacome

    pacome Active Member

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    I must admit that, for some months, I've grown cuthbertsonii's in a terrarium specially dedicated for them, with fluorescent lights less than 10 cm above the plants, and they grew fantastically well. But this was in winter, and I'm pretty sure I couldn't do that in summer without some kind of electric air conditionning! you're pretty blessed with climate , in California ;-)
     
  11. Tom-DE

    Tom-DE Well-Known Member Supporting Member

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    I have seen some excellent under light growers and I also seen many poor growers with greenhouses. I have done both. I am glad I can do reasonably well with my plants under light now but I still think gh has more advantages.
    Knowing what to do is a must but luck can play a tricky role too as long as you don't run out of good luck.