Offsetting 12/12 schedule by 1 or 13 hours

Indoor Growing
1

Hi to all,

I currently have a grow in 12/12 in its first week. Through circumstances irrelevant to this thread I am thinking about moving its light schedule from lights on 6am to lights on 7pm. I guess I have two questions:

  1. I know it would have risk but Is it to risky?

  2. In order to least impact the plants flower cycle should i be giving it an extended night, extended day, shortened night or shortened day to move its schedule? I imagine the shortened options would be off the cards as they would be 1 hour long which would be a bit freaky.

Thoughts?

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2

Let them sleep longer until you get to the hour that you start the new lighting schedule.

10 Likes
3

Exactly what Buzz said. What stresses them out is interrupting the dark cycle. Just extend it and all should be well.

7 Likes
4

I’ve done this before, but I didn’t progressively transition them at all. I just switched my timer to the new on/off times - letting them have 24 hours of dark during the transition. Plants didn’t seem to miss a beat, although I’ll never really know if there was some small effect or not.

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5

Thanks to all. A long sleep to the new lights on time it is.

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6

It don’t really matter, if they get 13 hours light or darkness.

As long as you as @ReikoX said, don’t interrupt the night cycle.

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Thanks @Palindrome. So just to confirm, If i initially had the lights coming on at 6am. Then ran them for 25 hours straight so that the lights go out at 7am the following day. Then the new cycle has lights on at 7pm. That would be ok on the plant?

1 Like
8

Should be fine. As other’s have said, not interrupting the plant’s “night” seems to be the preferred way to do it regardless of which way you choose to make the change. Myself, I go with extending night rather than day when I’m doing something like that, but I can’t say as I have any valid reasoning for doing so.