Yes we bloom lots of prolifs every year that are planted and yes they are true to the parent.
Tink how many years does it take the prolif to grow before it blooms? I cut 5 off that I had last year and potted them up! Even kept them in the porch over the winter and behold, 4 came back!!
"Remember this: Whoever sows sparingly will also reap sparingly, and whoever sows generously will also reap generously."
2 Corinthians 9:6