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diurnal variations in light & temperature for cattleyas

This is a discussion on diurnal variations in light & temperature for cattleyas within the Genus Specific forums, part of the Orchid Culture category; can anyone give the optimum diurnal variations in light (footcandles?) and temperatures for the successful ...

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    remo is offline Senior Member
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    Default diurnal variations in light & temperature for cattleyas

    can anyone give the optimum diurnal variations in light (footcandles?) and temperatures for the successful growth & blooming of cattleyas. I ask this specifically because I'm considering augmenting the natural light in my little greenhouse with t-5 growlights this fall and winter. I live in southern Cal so the temps are pretty mild.
    Thanks in advance!
    Remo

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    remo is offline Senior Member
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    Little help, guys...Please...

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    Brutal_Dreamer is offline Dreaming with my eyes open...
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    2000 – 3300 footcandles for most cattleyas.

    cheers,
    B D

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    As far as temps are concerned, I would guess your normal temps are just about perfect...I killed every cattleya I tried to grow back home in Alabama. I have since moved to northern California (Sonoma county) and the temps are allowing me to grow them well. I think the nights stayed too warm before.
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    Michael Saar is offline Senior Member
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    One caveat: in a lot of your "traditional" spring-blooming Cattleyas, bud initiation is by a shortened photoperiod. If you provide supplemental lighting, you may prevent these from flowering. Cut flower growers would shade their benches(light-tight) to force flowers for Easter and Mother's day(before these fell out of fashion).

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    remo is offline Senior Member
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    Hi Michael & BD...I've added some light because the location of the small greenhouse I use doesn't get anywhere enough light for catts in fall & winter. Temps I can always control but without supplemental lighting I can barely provide enough light for phals! I'm thinking 12 on and 12 off with a mix of cool and warm flourescents. What do you think?
    Remo

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    Quote Originally Posted by remo View Post
    Hi Michael & BD...I've added some light because the location of the small greenhouse I use doesn't get anywhere enough light for catts in fall & winter. Temps I can always control but without supplemental lighting I can barely provide enough light for phals! I'm thinking 12 on and 12 off with a mix of cool and warm flourescents. What do you think?
    Remo
    There should be an improvement with that much extra light. Good luck and be sure to let us know how it goes.

    cheers,
    BD

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