i can only give my plant 400ppfd of light(bloom 5.weeks)

4

420foreverQQ

Active Member
this is what happens when I do 500-550ppfd. what is the reason for this? does this greatly affect the amount of harvest?
samsung qb 281lmb+ 480w
24c
%40-45
this has been the case since day one, but now it is a more important problem.
 
CWF

CWF

Well-Known Member
How many hours is your "day"? 12 hours, I presume? At 400 ppfd for 12 hours, DLI is only 17, which is way low for flower. Most guides say 35-40 for flower. So, if you increase light (dimmer?) the plant does what?
 
4

420foreverQQ

Active Member
I have this problem since the first day. at first I was giving 200ppfd. I can give a maximum of 400ppfd at flowering. is there a reason and no solution to this? i think this will reduce my harvest a lot, please help
 
McShnutz

McShnutz

Well-Known Member
Your in week 5. Is that 5 weeks of 12/12 or 5 weeks of true flower (approximately 7 weeks of 12/12)

I see some fading that looks like nitrogen but a picture of the whole plant would help show more. However I believe you may have some limitations of photosynthesis because of lower than adequate nutrient. Nitrogen being one of them.
 
4

420foreverQQ

Active Member
McShnutz said:
Your in week 5. Is that 5 weeks of 12/12 or 5 weeks of true flower (approximately 7 weeks of 12/12)

I see some fading that looks like nitrogen but a picture of the whole plant would help show more. However I believe you may have some limitations of photosynthesis because of lower than adequate nutrient. Nitrogen being one of them.
Click to expand...
I have a nitrogen deficiency, but the situation is the same with all my other plants that do not lack nutrients. does this cause little harvest?
 
4

420foreverQQ

Active Member
I have been having this problem since the first day of seed. but during the fruiting period it turned into a much more important problem
 
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