Posted: 13/04/2017 at 18:27
There's nothing wrong with topsoil, it's what all my plants grow in, just not in pots.
You need something free draining for the thyme, rosemary and sage
Herb pruning is very much about snipping off pieces and using them
I would go light on the fertilizers, the harder herbs are grown the stronger the taste and the hardier they are. This may not apply to Vietnamese coriander, I don't know what that is.