GrowWeedEasy.com
You're browsing as a guest. Sign up to join the conversation, share your grows, and get help from thousands of fellow growers — it's free and takes less than a minute.
Time to show your grow.
- Thread starter Mr.furley
- Start date
homegrown
New member
Day 67...welcome to my nightmare. Last time i grew autos was 6 years ago under burple lights. Average height was around 2-21/2 feet. I'm at a loss...three of the four plants are still stretching(chem dog is the only normal plant), cant even see her in the pics cause shes way down in there. The unknown seed is in the back and has now gotten taller than strawberry pie(who is a biotch by the way...theres no pleasing her) I've gradually moved her pH up but still no real change. Probably doesnt help being 8 inches from the lights but the unknown plant is dealing with it. The outdoor plants got ravaged by last weeks heat wave and 40 mph winds for two days. No pics of them just yet. On a lighter side my outside pest control army hatched!!! Hopefully i can get some to hang around.
Attachments
Cool but How did you get this number?
I'm not much experienced grower but this is how i theoretically calculate yield:
630×12×3,600÷1,000,000×65×0.25×0.6÷28.3=9.4 oz
630: PPF of the light in umol/s
12: number of hours that plant receive light in a day
3600: number of seconds per hour
1000000: number of umol/mol
630×12×3,600÷1,000,000: is DLI in mol/day
65: number of flowering days
0.25: quantum yield in gram per moles of light received by plants when there is no other limiting factor. It's generally between 0.22 and 0.33 depending on light level. The more the light the less the quantum yield.
0.6: fraction of light received by plants. I will cover all footprint of light in next grow to be able to get 1 instead of 0.6. On that case quantum yield will increases from 0.25 to 0.33 gram/mol
28.3: number of grams per oz
What if i cover all footprint of light?
Can i expect 630×12×3,600÷1,000,000×65×0.33×1÷28.3=20.6 oz in your point of view? It means 2.1 gram per watt of electricity. Is it possible you think?
I'm not much experienced grower but this is how i theoretically calculate yield:
630×12×3,600÷1,000,000×65×0.25×0.6÷28.3=9.4 oz
630: PPF of the light in umol/s
12: number of hours that plant receive light in a day
3600: number of seconds per hour
1000000: number of umol/mol
630×12×3,600÷1,000,000: is DLI in mol/day
65: number of flowering days
0.25: quantum yield in gram per moles of light received by plants when there is no other limiting factor. It's generally between 0.22 and 0.33 depending on light level. The more the light the less the quantum yield.
0.6: fraction of light received by plants. I will cover all footprint of light in next grow to be able to get 1 instead of 0.6. On that case quantum yield will increases from 0.25 to 0.33 gram/mol
28.3: number of grams per oz
What if i cover all footprint of light?
Can i expect 630×12×3,600÷1,000,000×65×0.33×1÷28.3=20.6 oz in your point of view? It means 2.1 gram per watt of electricity. Is it possible you think?
Last edited:
Bowhunterwoody
Well-known member
Wow....