Another great article Koen on seed germination. I really enjoy your work with peonies and the fact you share it with all of us. Thank you!
I have also experienced similar results with consistent warm temperatures and better germination. My temperatures fluctuated about 2-3 degrees Celsius between daytime and nighttime, and the results for good germination were the best. In my cold germination, I used my cold room, which had the worst germination. I did not record temperatures but after reading your article got similar results.
Keep up the great work, and thanks for sharing with us your hybridizing goals and results. Super Interesting!
Adam Yakabuskie