Holy @#$% my P. incarnata seeds sprouted!!!
I bought a dozen P. incarnata seeds on ebay for a buck or two. Figuring they'd never sprout I then bought two seedlings somewhere else. The seedlings are doing okay but now four of nine of the seeds sprouted!!!
I read up on scarification and tried three techniques on three seeds each--
Soaking in vinegar for a short interval.
Placing in a small quantity of almost boiling water and letting the water cool.
Filing the seeds in a a few places.
The labeled one of each and lined them up in rows. They got a bit scrambled so I can't be sure but I think two of the vinegar ones and two of the boiling water ones are the ones that sprouted.
I already decided to overwinter at least one of my purchased seedlings inside as insurance. With the extras, I'll try a few outside to see what happens. I know they'll die back to the ground but we'll see if they come back.