420keepitgreen420
Active Member
is it the green spectrum that does the vegetation stage of the plant and the red spectrum the bud?
spectrums
- Thread starter 420keepitgreen420
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rollingstoned1982
Member
Hi I would do a little research before you start asking questions, as a fellow newbie I find you wont get much helpful replies if you could just use google. Its blue light for veg and red for flowering this chart shows the light spectrum.View attachment 1755874
420keepitgreen420
Active Member
thank you so much , your a good person i hope you know that 
rollingstoned1982
Member
happy to help , the best thing to do just now is research, most of the time we can answer our own questions but need the reassurance of others who have done it before.thank you so much , your a good person i hope you know that
darkdestruction420
Well-Known Member
No. Green light isnt really used by the plants, its so weak you can have one on while you are flowering during the dark period and it wont make them go hermie or anything. The answer most would give would be blue spectrum for veg and red spectrum for flower. That is not the correct answer though. cannabis has 2 types of chloroplast, one that interacts with the blue side of the spectrum and one with the red side. All using 1 spectrum does is limit your plants potential. Use both spectrums for both stages.
420keepitgreen420
Active Member
cheers both of you
rollingstoned1982
Member
he is correct about using both spectrums for the best results I was trying to keep it simple so as not to confuse. You can get lights with both spectrums and use it through the full cycle.
Jack Harer
Well-Known Member
Yes. In my opinion (and a lot of others as well) use both spectrums through out the grow. Not to say that doing MH for veg and HPS for flower is wrong, it's been done that way for years. I believe that both spectrums more closely replicates natural daylight. Now you COULD get really anal and start out the light cycle at the bluer end of the spectrum, and gradually shift it to the red as the "day" progresses as it does in nature, but why? I doubt you'd be able to quantify any possible increases, just as I have been unable to quantify any increase by using one light then the other for veg and for flower. Whether or not the plants actually use the whole spectrum, if it's in nature, I want it on my plants. In fact, I have gotten just as much tight, sugary bud using either HPS or MH for both cycles. Just one or the other, but not both. But by all means use 'em both if you got them. Just either get a light mover or rotate the plants to get the benefits of both lights.