The invitro plant sold as Tonkinensis yes, ( Kubotae is the real name, Tonkinensis is unavailable in the trade ), this one is more than possible, adult plants can grow just fine submerged, same issiue as before though, to get invitro plants going emersed is the way to go, over summer i grew mine on a south facing windsill which as picked up the growth rate a lot.Think it’s too late to my cancel order. I’ll put it in a spot where I can observe it
Have you tried Cryptocoryne Tonkenisis?
Yes it was purchased as tissue culture.Is it a tissue culture?