Need advise. Thanks:)

Would Leaving my seedlings in an open window at night Help it absorb oxygen and co2 better? Or would it make any difference at all?

As a seedling temp is much more important. Don't know your climate but you don't want more than 10 degree (F) change day to night. As far as your question... outdoor air is better than stagnate recirculated indoor air.

TheTreeMan said:

Would Leaving my seedlings in an open window at night Help it absorb oxygen and co2 better? Or would it make any difference at all?

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Sounds like a great way to invite theft or damage to me. You ought to have more carbon dioxide *inside* your room than outside, though bluntly, the difference is probably not significant enough to see a difference in growth in just a small seedling. Oxygen levels are probably the reverse (more outside than inside), but again, probably not to the point where you'd ever see a difference.

yea temps are key, a heating pad on low is great. also humidity helps for babies. put a dome on them. and dont worry about gases unless your doing a CO2 system. roots need O and leaves need CO... so just keep breathing, knowing every breath you take helps the leaves (...and makes the roots starve a lil more...)

no worries man, time and patience

Thank you all As for the theft, If someone wants to scale towards a 3 story window then I'd rather much see that then worry about them being stolen from my window. But all of the info seems legitimate. Thanks again.