Jill Taylor Bussiere jdt at
Mon Apr 15 08:50:18 EDT 2002

Thanks to you both, Bill and Ed - your advice is helpful.

> >    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
> 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.
> it costs something to run those things that long. You want something back
> return.
> Bill Shoemaker
> Sr Research Specialist, Food Crops
> Univ of Illinois - St Charles Hort Research Center
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