this is weird

Justin510

Well-Known Member
when i started my grow a few months ago
i sprouted the seeds under one ultra sun fluro tube ( only think i had at the time )

and i had about 8 plants under it, and they grew fine but slow,
now i have 6 of them under 8 24watt cfls and they seem to be growing faster but with more problems, 3 of the six have parts of there stem purple, and are really thin, but the other three are bushy and doing ok,

anyway the two i still have uner the fluro tube seem to be doing really good,
there really bushy and about 6 inches tall.

the light tube is here
Zoo Med Ul-36 Ultra Sun Trichrom 36 In

if its working alright with the two plants should i add it to my other plants too?

sorry i can't take pictures right now, but i will later.
 

entropic

Well-Known Member
How the Sunlight Effects cannabis plant Growth
200 - 280 nm UVC ultraviolet range which is extremely harmful to cannabis plants because it is highly toxic.
280 - 315 nm
Includes harmful UVB ultraviolet light which causes cannabis plants colors to fade.
315 - 380 nm
Range of UVA ultraviolet light which is neither harmful nor beneficial to cannabis plant growth.
380 - 400 nm Start of visible light spectrum. Process of chlorophyll absorption begins. UV protected plastics ideally block out any light below this range.
400 - 520 nm
This range includes violet, blue, and green bands. Peak absorption by chlorophyll occurs, and a strong influence on photosynthesis. (promotes vegetative growth)
520 - 610 nm
This range includes the green, yellow, and orange bands and has less absorption by pigments.
610 - 720 nm This is the red band. Large amount of absorption by chlorophyll occurs, and most significant influence on photosynthesis. (promotes flowering and budding)
720 - 1000 nm
There is little absorption by chlorophyll here. Flowering and germination is influenced. At the high end of the band is infrared, which is heat. 1000+ nm
How many watts/lumens is it?
Purple stem isn't necessarily a bad thing, lots of times it is a genetic trait not a deficiency.
Do you have a fan on them? It'll help make the stems bigger.
Some seeds have shitty genetics.

They sound like they're doing fine, maybe need a fan.
 
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