âThat explanation seem to say additional co2 is the fix.â
Robots are stupid.
AI is exactly like most potheads. It hears something, misinterprets it, and spreads nonsense. You can soak you plant in soluble sugars and gas it with cotton candy fumes, it doesnât matter if it canât move the carbon to the sinks fast enough, sink becomes a source even when itâs not photosynthetic.
i have read so many things on both sides of that bro science fence.
the only takeaway that seems to be a universal on that debate is finding MALES with hollow stems seems to be a desirable traitâŚ
youâve done far more pollen chuckinâ than i have dreamed about at this point, so what is your take on the search for hollow stemmed males?
Find the post on og where someone asks me what are the best ratios to grow weed and witness me dodge a question 
Not because I donât know the ârightâ answer but because your right answer is not the same as my right answer.
Some sativas will have hollow stems if grown from seed. Havenât seen hollow stems when growing from a clone.
Hollow stems are easier to supercrop.
Some of the old hemp husbandry publications Iâve perused mention the preference for hollow stems with pronounced fluting because it was easier to manually break and work for the fibers and such. Smoother thicker stalks made the work harder. I think that could be a carryover to why we associate hollow stems with hemp, but also to consider that most hemp back in the day wasnât specifically under a certain percentage of THC. We correlate Hemp as having a given amount of THC whereas back in the day hemp was the name for the plants irregardless of the total THC percentage. Hemp cannabis sativa. Many blessings and much love
Thatâs some 1994 dj short eccentricities my bro.
My best and only tip is âmix your own and dont listen to zienceâ
I donât think that itâs an universal idea to select a weak male only because it have a hollow stem ^^ Maybe you mixed with the fiber content/grade ?
So which is it? 
First pic says thick stem is hemp and hollow stem is weed
Second pic says thick stem is weed and hollow stem is hemp
Because not all plants are created equal. They donât all put out the same scents/flavor/high/growth rates so they all need slightly different amounts of each nutrient to be âdialed inâ. Itâs just like people, even in the same family, you can have siblings that need to supplement with extra vitaminâs or medication, while otherâs donât ever need it at all. If the line is a polyhybrid and not a true IBL, definitely gonna see a bunch of variation.
My old boss claimed hollow stems were more common in hydro because of the rapid growth factor. He swore that soil/coco grown plants had less hollow stems. He said you âwant them to be like strawsâ. As though it implies they can uptake more water. Hmm. Is he right? I doubt it, but I donât know.
My rockwool plants strech much more than my coco plants, and the rockwool plants do have a bigger hollow stem than the plants in coco.
100% the faster the growth rate, the more hollow the stems will be. The most hollow stems iâve found have been on @Tonygreenâs GG4 RIL.
Iâve seen both from the same genetics but across different growing years. We have been moving towards more organic media makeup with reduced salts amendment. E.g. not pushing growth as hard.
The pith is problematic for fiber production. They have to remove it by a process called retting. Hallow stems are easier to rett.
No, fluids move through the xylem and phloem on the outer layer of the stalk.
The second one is a misprint, the thicker the stem the more fiber. This is considering it is genetic.Fiber quality is another matter,that would depend on variety ex expensive books or high quality Bibles. That doesnât mean pithy stems canât be good weed, just means in general pithy stems give more fiber for textiles or animal bedding.
Many experienced breeders toss males that have pithy stems and select hollow because they have experienced higher thc content in offspring using hollow stem males.
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This subject is quite risky, people tend to search simple magic recipes that canât be universal from one strain to another.
Considering fiber strains to manage potency still work, but not to set a binary selection (hollow/not hollow, diameter, shape âŚ) and it imply to top the plant at one point of veg to analyze the trunk. No magic i said ^^
I think these shots i scavenged in my library will please you more, it enter in practical details :
If you keep the trunks of your harvest, you will quickly make a pattern with the most potent specimens. The priority of the plant to increase drastically its primary fibers layer is a stronger leverage than the âhollowâ funk.
This one present what is really the fiber for hemp, it help to understand why it impact so much the cannabinoids content, itâs a complex product just like the weed ^^
so Cal-Mag will work ? Always look at the stalk at time of harvest - used to use that to help determine if I harvested to early.
Interesting read, for me plants that had hollow stems were always potent plants. Idk if itâs a coincidence but thatâs been my experience. Just theorizing I assume this allows more flow like a humans blood circulating. Itâs easier for the plant to do this in its own fashion. Iâm just thinking out loud.