I would pinch them out when they are a few inches tall. But they will bush out a bit anyway.

It is sod's law that I sent you those seeds, then found that my plants all died in the severe winter!!! Luckily, I had over-wintered some cuttings as a precaution, and these are healthy and growing well.

Cheers, Robin.

Thanks again for your help Robin, They are just at a height to be pinched out now. I am sorry to hear your plants died - were they outside? I am aware that it is very borderline hardy, and I am planning to bring them undercover over winter.

I was about to pack up some of my seedlings and send them to you, until I read that you had taken cuttings. I have so many of your offspring I am going to be pushed to find them all good homes.

Cheers Peter