Re: Question about Amazon Sword and stem with plantlets
I had this happen to me a few months back, so while I can't say what the 'proper' method is I can share my experience....
I just left them growing in mid-air. They grew well - not particularly large, but with very dense leaves and roots.
After a couple of months the protruding stem started to rot (just a little) and a bit of algae was growing on the roots so I pinched them all off and planted them. I was quite suprised to find that what I thought was 3 plants was actually 3 'clumps' of plants and nearer 10 individuals!
So imho the choice is yours, leave them or plant them. Personally I think they look quite eye catching hanging out in mid air