Hello Ian,
I am curious about when you say you sometimes, or often, sow new seed back into the parent pot. Do you do this at repotting time to set the seeds at the depth you prefer? or do you simply scatter the seed on top of the 6mm grit and let it wash in?
Many thanks. I enjoy your efforts immensely.
Len
p.s. Do you have a web site of your artwork for viewing?
LR