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Cover seedling for increased humidity?
krogorstarted grow question 8mo ago
1. Does it make sense to cover the seedling with a cover (bottom of a plastic bottle) to increase humidity or should i remove it (e.g. for better air circulation)?
2. Should i switch on a fan that moves the air a little bit (pointing it above the plant)?
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Setup. Seedling
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00110001001001111Oanswered grow question 8mo ago
Unless you are in a very arid region, you shouldn't need a dome for a seedling. 20-30% rh might be wise to put a dome on and cut soem holes in it until it is an appropriate RH% for your temperature - vpd chart is a visual aid for this. You want a slightly slower rate of transpiration (i.e. lower vpd than for mature vege or flower) early on, but too slow and you impede growth. I've read different suggestions but .8-.9 is probably fine. I'm usually above that, and the impact must be tiny.
Circulation fan only needs to cause a little jostling of the plant. Definitely don't point it directly at it. A little twitch of a leaf here or there is fine.
SuperflyJayanswered grow question 8mo ago
Yes, seedlings like it humid and until they have popped just a bit above your substrate, you can remove it or cut a panel out even for mire air flow. I've done seedlings with no fan and they are fine but once they approach pinky-height (or your personal feeling as to when) their stems do benefit from that light breeze, like standing in the wind a little? But dont go crazy and dont run up your electricity needlessly. An half hour or an hour of fan here and there is enough when they are very young. A breeze here and there is beneficial for them though, more natural. Good luck, hope it goes great.
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SuperflyJayanswered grow question 8mo ago
Yes, seedlings like it humid and until they have popped just a bit above your substrate, you can remove it or cut a panel out even for mire air flow. I've done seedlings with no fan and they are fine but once they approach pinky-height (or your personal feeling as to when) their stems do benefit from that light breeze, like standing in the wind a little? But dont go crazy and dont run up your electricity needlessly. An half hour or an hour of fan here and there is enough when they are very young. A breeze here and there is beneficial for them though, more natural. Good luck, hope it goes great.
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