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RE: CULT light for seedlings

I'm glad to see this question come up. I can't cite a source, but
it has been my understanding for a long time that the idea of plants
needing a rest period was nonsense. I leave my lights on 24/7 until
the plants are hardened off and placed outdoors.

Granted, there are some plants that will "bolt" if the day is to 
long, and there are some that won't flower until "day length" is 
shortened, either naturally or artificially, but it seems that  
most are "day length" neutral and fruit or flower to their own 

Surely there must be a scientific study to tell us what is the 
optimum lighting situation.


At 09:28 PM 2/21/98 -0700, you wrote:
>We keep ours on for 16 hours too.  But I have also heard that seedlings
>(other than iris) respond well to 24 hour treatment.
>Maureen Mark
>Ottawa, Canada
>> -----Original Message-----
>> From:	Irisborer@aol.com [SMTP:Irisborer@aol.com]
>> Sent:	Saturday, February 21, 1998 8:23 AM
>> To:	Multiple recipients of list
>> Subject:	Re: CULT
>> In a message dated 98-02-21 07:11:17 EST, you write:
>> >when having extra light for the iris seedling, is ther anyone who have
>> got
>> >a clue 
>> >how many hours a day i shall keep it on. now i have it on for 18 hours a
>> >day.
>> >and  i have about +18C degrees.
>> Hi Gunnar.... I'm sure 18 hours is fine.... I keep mine on for 16 hours -
>> but
>> I think that as long as you provide a rest period, the actual time is not
>> critical.  I keep a thermometer in the aviary where I grow my seedlings
>> and
>> try to keep the temperature between 60 and 70 degrees F.
>> Kathy Guest
>> E. Aurora, NY
Duane Buell  Zone 6a but plan 5b for safety
Now featuring a BarnesandNoble bookseller link
dbuell@ptialaska.net or sales.ohq@sport4u.com

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