Best grow method for sog?
- Thread starter George2324
- Start date
Renfro
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ahh, I wouldn't think that size heatsink would have problems passively dissipating 60 watts of heat.
George2324
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Oh they don’t have an issue dissipating 60w of heat it’s no problem. The issue is putting 60w of heat into the air on my room with low ceiling so low air volume. Even with ac units powerful enough the heat directly in front of the cobs is always a lot hotter than rest of the room. Plus liquid cooling will be easier to remove heat from the room without running refrigerant lines
George2324
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60w per sqft gives me 1500ppfd across the canopy with a par meter
George2324
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I’ll probably get away with less wats when running a flat canopy and a sog though
Renfro
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honestly 900 - 1100 PPFD is on the high end of things, beyond that the plants start to be come carb limited and not light limited. When you are pushing past those numbers you really see diminishing returns if not loss due to light stress.
George2324
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Even with co2 at 1500? I remember reading about optimal being 1500 ppfd and 1500 co2 in a study?
George2324
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I’m out atm so struggling to read replies properly and reply with details information. Would love to pick your brains with some design ideas when I get back
Renfro
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Perhaps with an equatorial sativa dominant strain. TBH many indoor strains will react poorly to that much light. Some strains like levels around 900 IME and others take 1200. My observations are that the more indica dominant strains tend to like less light, of course there are exceptions to any rule. This is based on chlorosis (bleaching) of the tips of the tops closest to the lighting. Either way, you have enough light, just watch the plants and they will tell you if they are light stressed at any point.
Renfro
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all good, I'm crashing out soon anyways, suns gonna come up lol.
George2324
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I’ve never had any light bleaching so far at 1500ppfd but can’t rule out maybe less yield due to stress as I have no comparison.
Definitely plan on scrapping and redesigning the whole setup as I don’t like the way vertical plants grow personally and I can get a larger footprint by going sog and low height
Renfro
Well-Known Member
I grew SoG for so many years, made millions. If not limited by plant count I see flood and drain SoG as the best way to grow commercially. You do have to have big mothers that put out, but I used to pull 200 clones easily off 5 mothers under 1kW HPS every 20 days.
George2324
Well-Known Member
Could you see a dtw working in a similar way?
I need to make use of the sloped areas of the attic to make the most of the space I can have for plants so a res on the floor isn’t really an option unfortunately.
Renfro
Well-Known Member
Well it could for sure, just waste a lot of water and nutes. I ran my reservoir for the whole flowering cycle, flowering rooted clones (really rooted) 8 inch clones basically, they would go straight to pots and into trays in the flowering room. They ended up 40 - 44 inches tall with 21 gram dry colas. 48 per 4x4 area or 1kW SE HPS. I would lolipop them at 20 days in after stretch. Strain is key here. For me it was a constant GPW yield with old school HPS.
George2324
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I’ve read that dtw can waste very little if you don’t water to run off - that not true?
George2324
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Why 8 inch clones? If I flower a 3 inch clone straight away I end up with a 12 inch bud. Then you don’t have to waste time lollypopping
Renfro
Well-Known Member
Well repeatedly not watering to runoff is basically asking for salt buildups.
I cut them at 6 inches and after 20 days of rooting they were more like 8 inches and had really long roots. For me it was the way to get my goals. Not saying you couldn't do the same with more plants of smaller size, I just found this is what worked for me. How many plants per sqft were you running with 3 inch clones and what yield per sqft?
George2324
Well-Known Member
Was just a test small grow can’t really use the numbers for any realistic data. But I had 4 per sqft was got 19g per avg
Renfro
Well-Known Member
Really have to dial the sog to the strain. Sounds like youre pretty close if youre getting that yield. I always liked the strains that really popped after flip as they game me the yields. You have an exceptional strain if you can take 3 inch rooted clones and flower them getting 19g dry per plant. Good job!