Fortunately I was able to root some cuts, after experiencing some difficulty with that process, this year, due in part to the lack of a temperature controlled heat-mat.
Just to clarify, though, I do own a heat-mat but it's packed away in a box buried beneath dozens of other boxes, from a recent move I went through. Unfortunately the box contents weren't properly noted on every box.
At any rate, I failed to save a cut from all ten, but managed to end up with 10 rooted cuts, but it took about 30-36 cuts to get these:
These ones were under the humidity dome for a good month, I'd say. The oddest thing about them is that only 2 of the 10 had actual roots that grew outside the Rapid Rooter plug wall; just barely but clearly broke through the wall.
A third cut had a few tiny tips just exposed at the very edge of the plug wall, but just barely. You had to look really close to notice them. They were far from obvious. The other 7 cuts had absolutely no exposed visible roots, but they were still green and as healthy as the other 3.
So, I reasoned that these 7 cuts must have had tiny hidden roots, inside the plugs, or else they couldn't have survived as long as they did, and stayed as green as they did, for an entire month. That conclusion was also based on what I saw happen with the other cuts that eventually turned yellow and were culled.
Before I tossed them, I'd pull the yellow cuts from their plugs, to see if they resisted my pull. Several of them did cling to the plugs, indicating that they were being held in place by tiny roots. Several of them showed clear visible signs of root growth, when I pulled them out, and examined where I had applied the gel.
So, that led me to suspect the 7 green cuts, with no exposed roots, had to have some tiny roots, for them to have survived that long. So, if I had to form a "theory" of what happened in this case, as to why the root growth was so slow and minimal, I would blame it on two factors:
1. Hormonal, and 2. Temperature. Some photos below will show why I suspect it was a hormone issue. Secondly, whenever I removed the Rapid Rooter plugs from the tray, to examine them for signs of root exposure, they always felt cooler to my touch than the ambient temperature of my Sun Room, where they were kept. So, I'd say the temperature of the plugs was sub-optimal at best.
The above photos are all of the same cut: Male #4. If you look back through the Journal, you'll see the 5 males. This one was the second shortest of the 5, and the second to be culled.
You can clearly see the surviving male flower buds, in the earliest stage of growth. At least that's what it looks like to me. What do you all think?
Odd thing is, I can't remember them being there when I took the cut. If they were (there), they must have been so tiny that I missed them, not having inspected it that closely.
I tend to think it's a fairly recent development, which tells me the light cycle is wrong, and needs adjustment. I haven't been giving them supplemental light, to extend their light cycle, because I assumed they weren't mature enough to flower, in terms of root development. Being in the Sun Room full time, they're getting a short day right now; because I assumed they were too young to flower.
They haven't been in these pots that long. I expect it'll revert back to veg, when I give it more light, but if it doesn't, I have 2 extra cuts of that same male, atm.
FF