Thank you for checking, Carcass.
Thanks Skottelgoed that Caramel King is from B&B. The seeds that I couldn't sprout are not from the same source. They were from a friend and they are probably quite old. I'm trying a second one and if that works it may have to go in a pot outside because I am busy trying to sprout an NBA Diesel now as a replacement. If that doesn't work I'll definitely speak to B&B who I bought them from.
I still don't have wifi... day 4 of Frogfoot down, so using Telkom data still.
Thank you Jon. I have moved the plant closer into the 400 ppdf range and will check often to see if there is any stress. She is standing on her own again and her leaves are growing.