Jeff zone 8 N.C.

In the 1st week of April I removed the unsprouted Ensete seeds from their heat mat inside my house to my greenhouse and cut the small greenhouse heater off. Days were getting plenty warm and the temps inside the greenhouse would only drop to the high 50'sF- mid 60sF at night. The days were getting up to the 90sF inside so on the warmest days I would crack the door a little for ventilation. I have no powered or auto ventilation. I have been checking the seeds every weekend. Last weekend there were no sprouts. This weekend there were 5 sprouts. I got 3 more group "C" and 2 more group "B", For me still no Group "A".