You can try to carefully cut that off with a small bit of root with it, but it is quite tricky. The bit cut off will need to be re-potted and nursed to a decent size before planting out.
Similar to plants like Gaura, they do not do well being split as the roots are long tap roots.
They're really easy from seed. Mine self seed a bit, but sowing the ripened seed from a pod gave very good results. I had only blue ones initially, but seed from them has provided more blue ones, a few with pink flowers and a few white too I've not tried to divide them
Knowledge is knowing that a tomato is a fruit. Wisdom is not putting it in a fruit salad.
Thank you for your advice. I think I will leave it as it is and try to collect the seed in the autumn. I couldn't bear it to die after nurturing it so carefully.
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Similar to plants like Gaura, they do not do well being split as the roots are long tap roots.
Mine self seed a bit, but sowing the ripened seed from a pod gave very good results.
I had only blue ones initially, but seed from them has provided more blue ones, a few with pink flowers and a few white too
I've not tried to divide them
Wisdom is not putting it in a fruit salad.