Thanks hanazono,
I've just recently repotted the hellonasty ones and they are going back to green which is good before they didn't have enough water and weren't doing very well.
The Japanese ones were repotted later into better soil.
Hopefully they grow better this season, I have them in less light with more water so should be ok.
I have some other astro seedlings about the same age still in bag, they are nice and green so I'll leave them there a little longer.
What does banjyaku mean?