Lemon grass is quite easy to grow from the stalks sold in supermarkets or grocers. You want it as fresh as you can find it. I’ve only got some rather old lemon grass to hand -so it probably won’t work. But until I find some better stuff, I’ll give it a go.
The other secret I find is to put the pot somewhere it will get constant warmth underneath - a propagator is ideal if you have one.
There are some detailed tips and a video (with professional grower, Sally Cunningham) on the VV website:
I’ll keep you update on how / if mine grows!!