Nice! I hadn't been here in a while.
I love Rubrums and experiment exhaustively with them.
Those southern Reds... They KNOW it's not the south, up here.. I have to protect them like a zone 5 or 6... I lost a bunch and had a few die way back.
I can NOT treat them like Northern Rubrum.
So interesting. Seed source is a fun variable to play with when you are obsessed with genetics and selection.