Shortly after I set the overwintered pelargoniums into the ground late in June, I trimmed them. I took a two-year old equal-parts mix of sphagnum (here they call it spagnum and pronounce the g as a w) and sand, and filled an old strawberry punnet with it. Then I stuck the cuttings in. They were about four inches long and had all but the top leaves removed. I was trying to do everything by the book, that is, as per instructions I had found on various university horticulture websites.
In about a couple of weeks I checked them. Roots had formed on two, which I potted up in a couple of plastic buckets I had drilled drainholes in myself. I placed them where they'd get lots of morning sun.
I checked the transplanted cuttings every day, which is apparently why I couldn't perceive much progress. (I was also revising a manuscript so I suppose the inspection had been fond but cursory). Then, after a week of rain, I looked and noted that the leaves and branchlets had considerably increased on one. As for the other, the flower buds I had noticed earlier had turned a definite shade of red.
It looks like I managed to propagate yet another a sister to my favorite red geranium (pelargonium) plants.