Update. Well it’s been nearly a month and Dutch Passion suggested that the root threads may have got damaged or not have developed. So after nearly 30 days (I think) of this seedling that wouldn’t grow over 1.5 cm, I gave up. However I figured why not dig her up and just look at the roots. There were none! Amazing! So, what the hell. In for a penny, in for a pound - I cut off the little 1.5mm root “thing”, dipped the stem of that pitiful infant in rooting hormone and stuck her in another (more generous) rooting pod, and waited for her to die. She tuned all yellow, nearly. In the very center of her first real leaves was I small, glowing speck of chlorophyll. She was like that for probably over 10 days. And then BAM!! She shows some new growth! WTF?! If she ever actually grows up, and if I ever actually get Any real bud from this little miracle, it has to be really bad@ss!
Take a look. Should I be impressed?