Lights

Bill Shoemaker wshoemak at inil.com
Mon Apr 15 08:46:55 EDT 2002


>    I would say yes. The more light a plant has the better. The only
>exception to this is plants that require darkness to flower, i.e.:
>poinsettia.


Plants actually have a need for darkness. It doesn't have to be 12 or even 8
hours per night but certain physiological processes are dark-oriented. I
think it would be fine to supplement natural light so that the plants have
14-16 hours of light per day. But I wouldn't run it more than that. Besides,
it costs something to run those things that long. You want something back in
return.

Bill Shoemaker
Sr Research Specialist, Food Crops
Univ of Illinois - St Charles Hort Research Center




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