How much fan for how young??

B

bangthangonme

Active Member
For a 400w hps in a grow tent, should I keep the 6in oscillating fan on all the time, even for week old seedlings and younger, and always from the same direction?
 
always on and oscillating. i'm sure the temps would be too high without it. you think they wouldn't be able to survive in the wild with some wind? Just make the fan far enough away so she's not dancing too hard, at least for now.
 
If you're scared of too much air bending them over, you can always point the fan at a wall. That would give you good indirect airflow.
 
I kno its better to have them gettin wind than not, i tried at the wall but some of the further ones looked like they werent gettin any breeze. A couple of my week and a half old are fallin over tho, and I dont think from wind. Are you supposed to put dirt up to the neck of babies a little to give support?
 
they were probably falling over from not getting enough wind to make the strong. No, don't fill dirt on them, it will make the stem rot. Add a support stick if they are falling over and more wind. also when you top your plants it will make the stem thicker
 
I have my oscillating fans on when the lights are on (18-24 hours in veg, 12 in flower). I have vent fans though that stay on 24/7 and pull air through the plants, so they are still getting fresh air constantly, just not the powerful breeze of the circulation fan. I don't think it would hurt them to leave them on, but I don't think it really helps them all that much to go 24/7 as long as they are getting fresh air from the ventilation system. Plants don't produce oxygen when the lights are off, they consume it, so no ventilation is not a great thing.
 
yea gobbly I was planning on doin that soon as i get my inline. If your using sticks to tie them 2, should they be in the ground sideways, or straight up next to them, because Ive heard from different people that when you put a tall stick next to your plant, that your plant will try to outgrow the stick to get more light or somthin? Is this true, and is it stretching or actually growing bigger and better?
 
darkertint said:
they were probably falling over from not getting enough wind to make the strong. No, don't fill dirt on them, it will make the stem rot. Add a support stick if they are falling over and more wind. also when you top your plants it will make the stem thicker
Click to expand...

this is a myth. Strong light and good nutes are what makes the stem strong, not wind. A breeze just helps keep the air from getting stagnant around the plants.
 
bangthangonme said:
If your using sticks to tie them 2, should they be in the ground sideways, or straight up next to them, because Ive heard from different people that when you put a tall stick next to your plant, that your plant will try to outgrow the stick to get more light or somthin? Is this true, and is it stretching or actually growing bigger and better?
Click to expand...

Almost all plants have this thing and I can't recall the name, but basically if they aren't receiving blue spectrum they will stretch (in flower this is usually not noticeable since growing mostly stops in favor of flowering). Anyway, the reason is that red spectrum is much more easily reflected, so a lack of blue indicates tho the plant that it isn't getting direct sunlight, and should grow taller to penetrate whatever canopy is shading it. That could be responsible for what you are talking about.

I have used stakes in the past on plants, and never noticed stretching because of it. These days I use a tomato cage, and haven't seen any stretching from it either. I see a lot of people wrap them in netting or chicken wire as well, and they usually are quite bushy plants.
 
you can and should back fill seedlings. I do every grow. fill all the way up to the first growth. I start in solo cups a little over half full and the cup is full up before I replant. More times then not I back fill some when I replant also. try to set your fan to get some movement out of the plants. I would try to go over the top at this point. a cooltube would do wonders. You do need wind or at least some plant movement to keep the plant strong and to move air around the plant anyone who says other wise has no clue about growing anything.
 
+reps every1 good knowledge, gobbly i never knew that not havin the mh for blue spectrum caused that noticable of a change in growth, but i c how u mean. Stumps im gonna experiment with back fillin, so youve never had the stem rot like man said?
 
Never ever. Back fill with fresh soil and water as normal. At the end of the grow Dig down and see the root growth. FYI if the root was going to rot how can you make clones grow? you stick the stem in moist soil and let it root. But do not over water. that will cause root rot back filling or not.
 
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