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Huge fan leaves, should I prune them?
Posted 01 February 2010 - 08:29 PM
DWC system. Scrog. Using G.H Flora nutes. Lucas Formula. RO water
pH= 5.5. 900ppm. Room temp 68-78. Water temp 65. Humidity 15-30.
My plants have been vegging under 400w HPS for two weeks now. I shocked them during transplant but they have really taken off the last 3 days. You can see from the pics that the fan leaves are huge. I go in 4-5 times a day and try to move them so they don’t block the lower shoots.
I think I finally have things pretty much dialed in. But I would like some pruning advice for my scrog setup.
1. Should I remove/trim some of these fan leaves or just keep moving them?
2. Should I start trimming some of the lower branches so more energy goes to the top?
3. (for my next grow). I heard of a pruning technique where, You top under the 7th node, then remove the bottom three leaf pairs. Would this be good to do for a scrog setup? Or do I let them grow and keep bending them under the screen?
4. My humidity is pretty low. 15-30. Is this ok or would should I buy a humidifier to get it to 50-60?
Thanks for any input you can give me. Steve
Posted 01 February 2010 - 09:49 PM
I would clear out everything 2-3 inches from the bottom of the plants but don't touch anything else. If you keep the light close to the plant, it will be fine.
i must agree, dont trim the big fan leaves the are like large solar panels collecting energy for your plant, they are the most important leaves on the plant, but the lower stuf that wont be getting any light takes energy away from the plant, so basically you trim all the undergrowth and you should see up to a 30% increase in yield compared to if you hadnt cleared the undergrowth. but i would wait till they get a bit bigger and go through the screen, that way fill your screen and thn trim away everything below
Posted 01 February 2010 - 10:30 PM
I hate to be greedy, but what do you think of question 4? Some people top the plants, some don’t. funny, one of the 5 plants in my scrog accidently broke at node 4. I’ll be go to hell if it’s not twice as big as the other 4. I’m sure pruning the plant does cause stress and some delay in Vegging, but it may be worth it to get more yield?
Posted 02 February 2010 - 01:37 AM
Posted 02 February 2010 - 02:54 AM
Edited by bonghitz420, 02 February 2010 - 03:00 AM.
Posted 02 February 2010 - 03:03 AM
Posted 02 February 2010 - 06:09 PM
Agreed. I did a little experiment with my current White Widow grow. I trimmed most of the fan leaves off of one stem budding and left the rest completely untouched. the bud growth is THE SAME, if not slower in the one with trimmed leaves.
I wouldn't trim anything that is as vibrant green as your pics show. If they yellow or turn brown, yeah.
I believe the trimming shocks the plant a bit and lags the bud development just as much as it would from being in the shade, if not more. Anyway, this is just from personal experience but try what you want and perform your own tests to see what you believe. That's what I suggest.
But I never trim until leaves are at least 50% crispy and discolored.
Posted 07 July 2011 - 08:50 PM
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