I'm asking how to clone an Echium pininana.
I have a single Echium pininana in my pot but unfortunately it's root has rotted due to excessive rain and bad soil, the plant is 30cm high and 6 months old. The bottom 5cm has rotted and is infected with fungus Athelia rolfsii.
For pictures see : https://i.stack.imgur.com/cSkKD.jpg
I have access to tissue culture labs but I have no idea how to clone it from the healthy parts, where should I cut? Can anybody help? Or perhaps it's possible to use air-layering technique to grow a new set of roots?
I'm also trying to restart from seed, but the seeds I have is very hard to germinate, not sure why.