Has anyone had experience growing out Susan Louise seeds?
This year I have at least twenty o.p. hips of Susan Louise that are approaching maturity (a few with exogenous seeds).
The hip shape is champagne flute shaped and the neighboring roses are mostly teas,noisettes,portlands and chinas.
After seeing no hips last year, I had decided to wait on putting R. laxa pollen and some assorted cold hardy rose pollen on this one.
My first question is: would a H. gigantea offspring expect or need cold stratification before the seeds sprout? Thoughts?