What to do if you have light stress in week 5 of bloom?

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Markshomegrown

Well-Known Member
PJ Diaz said:
Then you really aren't paying attention, since the answer was in one of my posts on this page (hint: check post #95).
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Are you saying 2000 par would be good for your plants with added co2?
All the advice I have read says 800-1000 at the canopy level, do you know of a single grow diary on here where they tried 2000 par at the canopy level and pull a massive crop, I would like to see this.
 
PJ Diaz

PJ Diaz

Well-Known Member
Markshomegrown said:
Are you saying 2000 par would be good for your plants with added co2?
All the advice I have read says 800-1000 at the canopy level, do you know of a single grow diary on here where they tried 2000 par at the canopy level and pull a massive crop, I would like to see this.
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I didn't say anything of the sort, why are you putting words into my mouth? I simply helped you with one answer. Even at that you got it wrong. "2000 par" isn't a thing. Even with the sun at 2000 ppfd at noon in summer, that doesn't mean that it's 2000 ppfd all day long. DLI is much more important.
 
M

Markshomegrown

Well-Known Member
PJ Diaz said:
I didn't say anything of the sort, why are you putting words into my mouth? I simply helped you with one answer. Even at that you got it wrong. "2000 par" isn't a thing. Even with the sun at 2000 ppfd at noon in summer, that doesn't mean that it's 2000 ppfd all day long. DLI is much more important.
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Sorry PJ Diaz, I wasn't trying to put words in your mouth, 800-1000umol/m2 /s to me is ideal, and with co2 may be up to 1500.
I think for 99% of growers, adding co2 is a waste of time for the extra resources.
Wife has been told to self-isolate again(in contact with a child with Covid at work),(she had Covid 4 weeks ago) and we have been given the notice to move(landlord is selling) by the end of the month, very stressful time.
 
Adi1989

Adi1989

Active Member
Markshomegrown said:
Guess I have always used HPS, I flower my plants off under the HPS , never notice the stretch/HPS causing large node spacing. This was one of the plants under my led bulbs just under 3000k (purple punch)
View attachment 5081362

and my plant under the HPS (2000k)
View attachment 5081361

In general my plants grow between 2-3 foot tall.
don't see how they can grow any different.
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Thats because you are using 2000k and 3000k if you tried 4000k or 3500k you would understand
 
hillbill

hillbill

Well-Known Member
The reds drop dramatically in most LED phosphor whites about 4000k and up.
With old 4000k CMH and various white LEDs, my average flower lights averaged about 3700k and did very well. Ten years ago, 3000k LED panels and then COBs were hard to find.
 
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PJ Diaz

PJ Diaz

Well-Known Member
Markshomegrown said:
My veg light is 4000k and my flower light is 3000k, is 3000k good as a flower light?
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I like 4k white leds with additional red diodes (630nm and 660nm), plus 3100k CMH. To reduce stretch in flowering, growers will often use just 4k white for the first couple/few weeks of flowering, and it works. Once buds start forming after week 3, shift to lower kelvins.
 
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