Roger that.
Do 1000w ballasts really generate 2400btu of heat each? If that's the case then I'll want to place the ballasts outside the grow area.
Re: [GFP] Double SS400W Grow Journal
by FCGFrank » Sat Feb 02, 2013 11:36 pm
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Re: [GFP] Double SS400W Grow Journal
by SisterMaryElephant » Sat Feb 02, 2013 11:43 pm
They can get pretty hot but I couldn't say for sure how hot; outside is always best when you can.
Disclaimer:
I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.
I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.
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Re: [GFP] Double SS400W Grow Journal
by FCGFrank » Sun Feb 03, 2013 12:36 am
If I ran 8 plants in RDWC under two 1000w HID in a fully dialed in system, is 1g/watt easily feasible?
And I had a look at the Sgsensor products... you just made this geek a happy person.
And I had a look at the Sgsensor products... you just made this geek a happy person.
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Re: [GFP] Double SS400W Grow Journal
by SisterMaryElephant » Sun Feb 03, 2013 12:58 am
It's not necessarily the number of plants. If a grower has enough light for the area covered, plants not overcrowded nor too sparse, using the right genetics and proper environmental conditions; it's very achievable. I wouldn't count on that without some experience but you're certainly setting yourself up for great future results...so I'd say possible. A system like you're talking about building might even exceed 1g/w eventually.
Disclaimer:
I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.
I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.
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Re: [GFP] Double SS400W Grow Journal
by FCGFrank » Sun Feb 03, 2013 10:56 am
How do you determine how many plants you need to get that magical 1g/w (or more)?
Ed's books says it's especially about the genetics of the plant (his point of reference is 90w/sqft for Sativa, 80w/sqft for sativa-indicas, 70w for indica-sativas and 60w for indicas) but doesn't mention more than that on the subject. Is there a ballpark you can go buy?
I added another 1/8 nute dose to the res to bring PPM to 900 because according to the literature 3 weeks in veg I should be at 1200-1500 now, but the PPM levels do not go down.
Ed's books says it's especially about the genetics of the plant (his point of reference is 90w/sqft for Sativa, 80w/sqft for sativa-indicas, 70w for indica-sativas and 60w for indicas) but doesn't mention more than that on the subject. Is there a ballpark you can go buy?
I added another 1/8 nute dose to the res to bring PPM to 900 because according to the literature 3 weeks in veg I should be at 1200-1500 now, but the PPM levels do not go down.
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Re: [GFP] Double SS400W Grow Journal
by SisterMaryElephant » Sun Feb 03, 2013 12:57 pm
As I said, it's not just about the number of plants because the number changes depending on growing styles, grow area and genetics. SCROG uses less plants SOG uses more, for example. What you're aiming for is a full grow space that's not overcrowded and you'll only figure out how many plants that is by trying it and making adjustments. Some genetics may never hit the 1g/w mark...
Disclaimer:
I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.
I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.
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Re: [GFP] Double SS400W Grow Journal
by FCGFrank » Sun Feb 03, 2013 1:39 pm
Most of the genetics I was looking at were reporting 500g/m2 (1 m2= 10 sqft approx... don't know if you guys use metric in Cali for weed stuff?).
So in a 4x8 that'd be about 3m2, so 1500g under optimal condition. We're pretty far off from 1g/watt if there's 2000w of HID in there.
So it may seem the ultimate quest for a grower is to find a strain he likes (smell, potency, cbd/thc ratios) versus his expectations of yield and find a compromise.
So in a 4x8 that'd be about 3m2, so 1500g under optimal condition. We're pretty far off from 1g/watt if there's 2000w of HID in there.
So it may seem the ultimate quest for a grower is to find a strain he likes (smell, potency, cbd/thc ratios) versus his expectations of yield and find a compromise.
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Re: [GFP] Double SS400W Grow Journal
by SisterMaryElephant » Sun Feb 03, 2013 1:55 pm
I would only use those breeders estimates (g/m2) to compare one seed to another, not so much to estimate real yield. Those estimates are not based on every growing system, just one that they picked.
That is the reality of it. I've grown strains, that I liked, that never hit the 1g/w mark and I've grown other strains that did. If grams is your main goal, try the highest yielding strains you can find. If a certain trait is what you're looking for, search for that. If you're lucky you'll find one that meets all of your desires.
That is the reality of it. I've grown strains, that I liked, that never hit the 1g/w mark and I've grown other strains that did. If grams is your main goal, try the highest yielding strains you can find. If a certain trait is what you're looking for, search for that. If you're lucky you'll find one that meets all of your desires.
Disclaimer:
I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.
I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.
- SisterMaryElephant
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Re: [GFP] Double SS400W Grow Journal
by FCGFrank » Sun Feb 03, 2013 3:15 pm
I've been having a lot of fun testing the various training techniques then waiting 2-3 days to see how the plant reacts.
So far supercropping is my favorite, it takes a few seconds to do and I don't feel like I may cut the wrong part. It's worked very well too.
I tried fimming and topping but the plant seems to react the same as SC but there is more risk of doing a mistake in my case due to lack of experience.
I think I'm gonna stick to SC with the scrog to fill up as much of the screen as I can.
So far supercropping is my favorite, it takes a few seconds to do and I don't feel like I may cut the wrong part. It's worked very well too.
I tried fimming and topping but the plant seems to react the same as SC but there is more risk of doing a mistake in my case due to lack of experience.
I think I'm gonna stick to SC with the scrog to fill up as much of the screen as I can.
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Re: [GFP] Double SS400W Grow Journal
by beefxer » Sun Feb 03, 2013 3:56 pm
Supercropping (AKA High Stress Technique) was my primary means of training plants until I started using SCROG. I top the plants and lollipop so there are ~4 primary branches, but from there I can just pull individual branches under the screen as they grow, and that takes care of training. The key for SCROG seems to be knowing how long to veg before switching to 12/12, how tall to allow branches to grow above the screen (canopy depth), and branch density (pruning). I haven't quite dialed it in yet (longer veg plz!), but I just completed my first SCROG harvest so that's to be expected.
Hope that helps.
Hope that helps.
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