Low Yield. Why?!

growingforfun said:
Everyone is saying it's your temps but they arnt THAT low... I've ran colder than That an done just fine.

I'm gonna say its 85% your light, 10% being new, and 5% the temps.
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Temps are definitely too low! We KNOW this hasnt helped his yield. Just saying.
 
Just be careful with that advice . I've run lower than 15 and got away with it with some plants but not others. My last crop was 100% crippled by the cold. My min is now set to 17 and the same plants ( from same mother) are flourishing. Same tank, food, pH.

I would add, I know nothing about his led so can't add to that side. 200% stretch sounds a lot like light starvation too.
 
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Dodgey99 said:
Just be careful with that advice . I've run lower than 15 and got away with it with some plants but not others. My last crop was 100% crippled by the cold. My min is now set to 17 and the same plants ( from same mother) are flourishing. Same tank, food, pH.

I would add, I know nothing about his led so can't add to that side. 200% stretch sounds a lot like light starvation too.
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I can see where your coming from dodgey, and I too have had good yields from lower temps but it is something that definitely wasn't optimal. I too know nothing about this light but 600w at the wall isnt low powered. Maybe he also had light too far away from canopy which would explain stretch....?
 
I think the OP is mistaken on his 600w led pulling 600 watts out of the wall. If it was, he/she would have yielded a lot more in my opinion. I have a 650w led and last grow I yielded 21oz. from 3 plants in a 4x4 tent - pretty much my norm per plant.
I would also like to know his feeding schedule with the coco - I feed twice a day.
 
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beepy1 said:
In my 4 ft x 4 ft grow space and usimg a 600 Watt blurple LED (true power draw from outlet), i only yielded 5 ounces. I used a DNA Genetics strain called The OG #18, and I grew in coco coir. The plants remained healthy throughout the grow, but the buds never seemed to pack on much weight. The only thing that was not ideal in my grow was the temperature near the root zone, which ranged from 13C (55F) at lights off to 17C during lights on. The temperature near the canopy was from 13C (55F) to 22C (72F). Could the low temperatures cause the low yield I had? What else could cause the low yield if the plants were green and healthy looking the entire grow? I know the blurple lights are not the best but other people seem to get better yields with blurples at even lower wattage than I had. The pictures I attached show a quarter to a half of my 5 ounce disappointment.
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You have a blurple that pulls 600 at the wall?? Are you using a killawatt or something to measure? Also, what exact light are you using (brand/model etc.) I know you mentioned that root temps were your only issue, but it also looks like you overfertilized at some time with the burnt tips. Too much N in flower after stretch will often hinder weight at yield. Its difficult to tell anything under the purple lighting. Do you happen to have any pics under normal lighting?
 
Hydro4life said:
Temps are definitely too low! We KNOW this hasnt helped his yield. Just saying.
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OP said "The only thing that was not ideal in my grow was the temperature near the root zone, which ranged from 13C (55F) at lights off to 17C during lights on. The temperature near the canopy was from 13C (55F) to 22C (72F)."

I've grown in much colder temps than these and done JUST FINE. I'm not ready to give the majority of the blame to the temps but I guess you can if you want to.
 
growingforfun said:
OP said "The only thing that was not ideal in my grow was the temperature near the root zone, which ranged from 13C (55F) at lights off to 17C during lights on. The temperature near the canopy was from 13C (55F) to 22C (72F)."



I've grown in much colder temps than these and done JUST FINE. I'm not ready to give the majority of the blame to the temps but I guess you can if you want to.
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Growing for fun,
I never said that this is where the majority of the low yield came from, I was just pointing out that his yield would of been better with higher temps, no doubt about it! Do you disagree that a warmer environment would not of made more yield? There is no doubt there would be 10 things that weren't perfect (as with anyone's grow) I'm just pointing out the obvious with the info we had.
This post was all about his low yield and what he could do to improve it and minimise yield loss for next time. I do stand by my post to increase temps. On a HEALTHY plant you will notice a significant gain with optimal temperature. Environment is sooo important. Why is it that when dosing co2 you have to raise temps by up to 5 degrees Celsius to help put plants into overdrive and see the real benefits of dosing co2?
 
Hydro4life said:
Growing for fun,
I never said that this is where the majority of the low yield came from, I was just pointing out that his yield would of been better with higher temps, no doubt about it! Do you disagree that a warmer environment would not of made more yield? There is no doubt there would be 10 things that weren't perfect (as with anyone's grow) I'm just pointing out the obvious with the info we had.
This post was all about his low yield and what he could do to improve it and minimise yield loss for next time. I do stand by my post to increase temps. On a HEALTHY plant you will notice a significant gain with optimal temperature. Environment is sooo important. Why is it that when dosing co2 you have to raise temps by up to 5 degrees Celsius to help put plants into overdrive and see the real benefits of dosing co2?
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I addressed temps played a roll it my post. Probably about 5% of his issue.
I think his light played the biggest role in his low yield.

I've had water FREEZE in my room and still got a lb and a half from 1000 watts. For a lot of strains I want it to be 72f in flower, and have no complaints if its 55f at all.
Sure at 78f it will typically yield more, but it's a minor issue ime.

I think blaming the temps as the main factor wont help him, finding out what exactly his light is will likely be the best place to start, then other issues. Maybe early harvest, maybe poor soil.
 
growingforfun said:
I addressed temps played a roll it my post. Probably about 5% of his issue.
I think his light played the biggest role in his low yield.

I've had water FREEZE in my room and still got a lb and a half from 1000 watts. For a lot of strains I want it to be 72f in flower, and have no complaints if its 55f at all.
Sure at 78f it will typically yield more, but it's a minor issue ime.

I think blaming the temps as the main factor wont help him, finding out what exactly his light is will likely be the best place to start, then other issues. Maybe early harvest, maybe poor soil.
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Yes you did and I did not disagree with you. Nor did i nit pick at your reply. Yes Lighting is generally the biggest factor. Show me where I said the temps are the MAIN factor!! I was the first one to mention he may of harvested early. I mentioned veg time vs plant count, strain, his light may of been too far away. I have also seen huge yields pulled from a 250w hps! So growing conditions are not perfect thats for sure and as MOST people know, you can throw all the light you want at a plant but without the right environment you aint going to achieve much! And "a minor issue" maybe, but if you sort 5 minor issues out like i stated, temps, strain, light too far away, plant count, veg time. It adds up trust me! 7 other people also mentioned low temps..... hmmm!!! And funny you say that because I pulled 2.3 without frozen water! Wink.
 
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Atleast i tried helping the guy by brainstorming with him and throwing some ideas at him.
growingforfun said:
Everyone is saying it's your temps but they arnt THAT low... I've ran colder than That an done just fine.

I'm gonna say its 85% your light, 10% being new, and 5% the temps.
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Time to nit pick at your response lol. How did you come up with 85% lighting!? Did you pluck it out of the sky? And 10% being new!!? Where did you pluck that one from? He's obviously not new when hes bending, supercropping, topping!! And 5% temps haha another pluck!? You forgot to add everything else to your percentage ratio of plucking! Is humidity not important? Fresh co2 not important......... I think you have been a fool and rushed in here buddy. You haven't read the full post properly and you haven't thought before you started typing. Hopefully you have learnt something today about importance of a dialled in environment!? AND SORRY BEEPY for doing this on your post, I mean no disrespect but some people just have to be publicly told! Best of luck to you with your next grow BEEPY and I wish you the best of luck! I'm out, peace.
 
growingforfun said:
I love it when long time members like @Hydro4life contribute, it add so much to threads. A true blessing.
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Again another not well thought out response. Since when did not being a long time member mean youve had no experience. Trust me buddy im new to this site but I'm not new to growing! Or is that what gave you 10% more yield? When you became a well known member of rollitup haha.
 
And who grows in frozen water?? What medium are you using? "I've decided to invest all my money into lighting, so itl be ice for my medium this winter" great, this from a "well known member" haha
 
Hydro4life said:
And who grows in frozen water?? What medium are you using? "I've decided to invest all my money into lighting, so itl be ice for my medium this winter" great, this from a "well known member" haha
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I didn't grow in frozen water smart guy, there was a bucket of leftover water, that was frozen the next morning. I had a outdoor grow shed and a cold snap came through in December lasting about 2 weeks. It was freezing at night in the shed an about 50's during lights on and I still had a good harvest. I'm not saying crazy low temps grow better or more, I'm saying it's not a crippling factor.

New members tend to have zero respect and know everything. Fact is your new around here and it shows.
 
there are certainly blurples on amazon that do draw 600w. that is about the maximum and they are suuuuper overpriced but they do exist. the OP states very clearly that is the draw from the wall
 
pulpoinspace said:
the OP states very clearly that is the draw from the wall
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OP is also looking for help in identifying why the yield was low. Light wattage / output is arguable the most important factor and for all anyone knows the OP is just going based on what the person at the grow store told him. If you don't think its important to confirm wattage draw then your probably not very interested in helping OP.
 
growingforfun said:
I didn't grow in frozen water smart guy, there was a bucket of leftover water, that was frozen the next morning. I had a outdoor grow shed and a cold snap came through in December lasting about 2 weeks. It was freezing at night in the shed an about 50's during lights on and I still had a good harvest. I'm not saying crazy low temps grow better or more, I'm saying it's not a crippling factor.

New members tend to have zero respect and know everything. Fact is your new around here and it shows.
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I think your showing your age old timer. "Wink" us new members dont show respect when none is given. Is this how you greet all new members. Everybody else i have spoke to have been courteous and just generally trying to help people. And don't get your panties in a twist, I'm just stirring up an old boy. (That grows in frozen water)
 
The burnt tips make me wonder if overfeeding had a hand in it... I too grew some fire but low yeild. My temps are spot on 27C day 21C night. RH is always at 50% during flowering. I to had a healthy plant but again low yeild. Probably genetics but who knows.
 
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