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 fedor
Stranger
Registered: 05/18/10
Posts: 4
Last seen: 14 years, 3 months
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 increase in light intensity effect on seedlings 
#432869 - 06/14/10 08:39 PM (14 years, 5 months ago) |
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I just put my 12 day old seedlings under a 400 mh bulb, 4 feet away, from a small floursecent. Originally it was maybe 2 feet away and a couple leaves began to turn yellow, so i moved it. However ,its also the first time I fed them, half strength root 66. I also transplanted them into a larger rockwool cube. Is it possible its just the combination off all of that causing a bit of shock? Or was it simpy the change of light intensity.
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Lucid
Monster Plant Creator
 
Registered: 07/18/08
Posts: 1,082
Loc: Canada-ish. 
Last seen: 8 years, 4 months
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Re: increase in light intensity effect on seedlings [Re: fedor]
#432908 - 06/14/10 10:44 PM (14 years, 5 months ago) |
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pics? You probably just need those nutes to kick in. Though putting seedlings only 12 days old is kinda pushing it for a 400w,but at the distance you had them that shouldn't have effected them that much. Wait a few days and see if they improve, or you could put them back under whatever you had them vegging under before the 400w. Probably not a bad idea to just keep them under that until they are like 20 or so days old.
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DieselB
High Watt Closet
Registered: 02/10/10
Posts: 1,156
Last seen: 9 years, 8 months
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Re: increase in light intensity effect on seedlings [Re: Lucid]
#433449 - 06/15/10 11:15 PM (14 years, 5 months ago) |
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When switching from flouro to HID, some stress is normal. Four feet away shouldn't be causing you many problems. I've grown seedlings from the first day under a 600w at about three feet away.. Just don't keep them directly under the light, put 'em off to the side for a few days to let them get used to the intensity.
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If you ain't smokin' dro, you're smokin' reggie. 
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