Here is the second part of God knows how many will follow.
The innovative Romans used natural mineral to progress the sowing of seeds. they used mica (transparent crystals from granite) as we use glass today, to retain within a small area the warmth from the elements whilst still allowing them to take advantage of full daylight.
Gradually we were able to associate the cultivation of plants with the medium in which they were so struggling for survival. Hormone rooting powders, of course, were not available in these ancient times, so we improvised. Again, it is a Roman gardener who is credited for realizing first that if we dipped the bases of cuttings into ox manure
it was possible to encourage rooting and the development of a good rooting system. It is believed , too, that his contemporaries were the first to grow cuttings from pieces of plant root (believed to be from a thistle), although sound documentation on the subject, pre-dating the 17th century, is hard to find.
Who is the Roman mentioned above? I do not know, and do not care. What is relevant, is the propagation issue. It is always fascinating reading about edible gardens.
It is a seasonal fad, coming and going, but they never mention the propagation of plants as if they will raise out of the blue, without any problems and difficulties.
The other strange related subject are those people claiming to have a grey thumb. I wonder how many times they tried, probably incorrect plants for their context, with excess irrigation. It seems that people kill their plants indoors more often for this reason than the contrary.
that is that.