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Very long photoperiods?

Posted by drhorticulture_ Z3 (My Page) on
Mon, May 10, 10 at 16:44

I've been keeping some of my eggplant seedlings under an approximate 72 hour light/12 hour dark regime because the T4 light fixture is immovable and a whole foot above the plants. (I do have other adjustable fixtures but there's no more space under them).The seedlings are at the 4th-5th true leaf stage and looking stocky and healthy. Have you done this and if so,did you notice any harmful effects?

Follow-Up Postings:

RE: Very long photoperiods?

I don't know about the long photo period. Some plants do need a dark period, but I don't know about eggplants. You can try 18 hours light, 3 hours dark; same proportion but have some rest period.

And have you considered raising the seedlings up? You don't always have to lower the fixture. A shoe box, a few books, a stack of magazines, or many other things can be used to raise the seedlings.

RE: Very long photoperiods?

I have not tried doing that but I don't think that the long photo period should be of any much concern. Although when starting on seeds, you are only advised to have an 18 hours on and 3 hours off photo cycle. But if you're doing great on that set-up, there shouldn't be any worry :)

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