How many actual watts do you have going in what size area? I wouldnt worry too much about it, they look very healthy!
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Thats a lot of light for a 5x5 tent, is that the SOG you are planning? Ever consider cutting that wattage in half for the first 30 days or so? I think it is possible to have too much light during the veg phase, but I dont have a lot of real life experience with LEDs, just going by what I have read and see in journals.
No, the SOG is going to be run with one 490 watt light. In the 4x8 I have four ~250 watt lights. I start babies off under one or two and work up to full power as they grow. A lot of the size definitely has to do with genetics. I took a look back through my mixed super soil thread, with the same four light setup in a 5x5. The AutoUltimate, Headlights Kush Auto, and Sugar Black Rose all got very tall in the same tent, at the same time, under the same conditions that the AutoWhite Widow, Blue Dream Auto, and Cream Mandarine stayed short in. I think if the plants are getting sufficient light the rest is determined by it's genes, but if the light is lacking than they'll always stretch.
What Im thinking, and I may be wrong, if you give plants that genetically want to be small(given optimal conditions), less light than they would prefer early, maybe even for just a week or two, causing them to stretch some, but then giving them more light once they start to flower, the plants might end up with more final weight do to better penetration of the canopy due to the stretch? Those short squat plants are so dense that light often doesnt get to the insides well, without some defoliation. I havent done any test to prove this, but it would be an interesting to experiment.
What would happen if you gave plants 40w/ft for the first 3 weeks, then cut back to 20 for the 4th and maybe 5th week, and then went back to 40 for the rest of flowering, could that potentially INCREASE yield over keeping them at 40 for the entire grow period?
What would happen if you gave plants 40w/ft for the first 3 weeks, then cut back to 20 for the 4th and maybe 5th week, and then went back to 40 for the rest of flowering, could that potentially INCREASE yield over keeping them at 40 for the entire grow period?
To be honest, I think the amount of light that I give the plants is what allows them to flourish, and allows the side branches to be almost as tall and high yielding as the main cola. I've been afraid of losing out in total yield if I was to use less light. When my Secret Santa and New Release seeds show up I'll start them all under less intense light and let them stretch a bit in the first week or two before giving them everything. I'd think backing the light off at 4 weeks may be too late since they would already be used to the full intensity, but I'm no scientist. It does seem like a fun experiment though. If only I had more space. Who knows, I could just be wasting light and hurting the youngins with such intensity. It seems that most strains do alright with the lights how they are, but some could go for a bit more breathing room too.
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mephisto
AFN Authorized Vendor
Maybe it's an led thing.
when we grow our strains, they are getting roughly 40w /5600 lumens per square foot from day 7 on.
which doesn't seem too intense at all, running 18/6 it always makes for healthy plants.
we don't use metal halide anymore.
It could be related to pot sizes and transplants too, as at or before the 3 week mark they get transplanted up and basically are set to explode, so I wouldn't consider minimising light at that point, I think would be counter productive (for us).
cheers!
ps I think LST is great but suited to some of our strains in particular, the medium to large varieties, the smaller fast ones I'd personally leave be aside from some leaf tucking.
Either way it's a good test here by Mr gbd, and the plants look lovely and healthy.
when we grow our strains, they are getting roughly 40w /5600 lumens per square foot from day 7 on.
which doesn't seem too intense at all, running 18/6 it always makes for healthy plants.
we don't use metal halide anymore.
It could be related to pot sizes and transplants too, as at or before the 3 week mark they get transplanted up and basically are set to explode, so I wouldn't consider minimising light at that point, I think would be counter productive (for us).
cheers!
ps I think LST is great but suited to some of our strains in particular, the medium to large varieties, the smaller fast ones I'd personally leave be aside from some leaf tucking.
Either way it's a good test here by Mr gbd, and the plants look lovely and healthy.
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I find this statement of your experience quite interesting, as it is counter to the concept popular on forums, that transplanting autos in a no no. Is that really a garden myth? What's your take on the subject? Be nice to have a professional opinion!
mephisto
AFN Authorized Vendor
In my experience, it doesn't have to be a no-no
starting In final pot, may allow plants to end up bigger,
in smaller pots you can risk stunting, leaving them too long before transplanting = stunted, allowing pot to dry out = stunted
i do notice people reporting the day they show sex is several days later than what we usually see, whether this is down to lighting or pot size, I couldn't say.
A germinated seed sown into a 1.5 litre square pot,
we see pre-flowers from days 12-19 from sprout.
but we transplant when they are barely visible.
And so I think the correct care and timing of the transplanting is the key to minimising any ill effect.
cheers
starting In final pot, may allow plants to end up bigger,
in smaller pots you can risk stunting, leaving them too long before transplanting = stunted, allowing pot to dry out = stunted
i do notice people reporting the day they show sex is several days later than what we usually see, whether this is down to lighting or pot size, I couldn't say.
A germinated seed sown into a 1.5 litre square pot,
we see pre-flowers from days 12-19 from sprout.
but we transplant when they are barely visible.
And so I think the correct care and timing of the transplanting is the key to minimising any ill effect.
cheers
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..Pop' :smoke:...check out the older grows done by the Sweet guys, Jayp and Tommy,... they moved their plants twice I think, last step just as bloom began(?), and the plants never noticed a thing, judging from the results!... I think it has everything to do with timing (just how much restriction the roots experience-- fairly minimal), and very much technique,... I've done some transplanting too, to no ill effect... it's all about how much trauma the roots go through; if the whole pot can be gently extracted with little to no damage to the roots-- basically the whole works, soil+ roots, no soil fall off, tearing at microfilaments, etc., no crushing/compacting when placed into the pot, they move just fine.... both Sweet and I made the hole in the bigger pot by placing the exact same smaller pot into it and filling around, so as to make a perfect shaped pocket for the incoming plant,... it's difficult and tricky, to keep all the soil in form, but a little bit of loss or compression seems to be tolerable, otherwise, this shaped pocket makes for a perfect fit, no need to mess with things any further!... as always, a shock/stimulation treatment with Superthrive/B1 is helpful,... timing as to when is tricky at first too, experience= x-ray eyes makes all the difference here!... you don't want the plant to experience much cramping, but there needs to be enough root mass to hold the soil together,.. and on the drier side too, to aid in cohesion! ..muff it up, and you get a shocked plant, which may result in stunting, as many of us know all too well! :slaps: 
>>> :tiphat: :Sharing One:brudda's GBD, Mitch-- :Cheers:....looking good as always GBD!
>>> :tiphat: :Sharing One:brudda's GBD, Mitch-- :Cheers:....looking good as always GBD!
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