To my amazement, I just noticed a scape on a seedling, direct sowed out side in May. I planted these seeds, were the irrigation from the Field Corn field would hit them. Liquid Nitrogen is ran through the irrigation system several times during the growing system. I have become a believer that Nitrogen is the key for shorting the time for first bloom in Northern areas. I also had a high rate of first year bloom from my one-year-old seedling this summer, and am still having first time scapes showing up from them. I wanted to share this info, for other Northern seedling growers, to let them know that a high rate (over 50% for me) of bloom can be achieved in a year, for a zone 6a garden. I will add that I had no first year bloom of seedlings, before planting in a spot were they received regular high doses of Nitrogen. The rate of multiplying is also much higher for these seedling, I have multiple seedling planted this May, that have dived into two or three fans already.
Seedling planted May, 2016
Seedlings planted in 2015
One-year-old seedling blooming today, over 40" scape