I set out to increase the ambient heat by supplementing with a space heater directed at the propagation level in the grow stand. Possibly to much of a good thing, I left the heater on high and forgot and after 6 hrs I realized and shut it off. Granted I'm using an inferred thermometer that measures surface temps but the soil clocked in at at about 90-93 F. Hopefully I didn't boil the seeds in their moist environment. I'm still playing with added heat but keeping it on low and I'll see what happens. The seeds were only sown a few days ago.
If I'm understanding what I'm looking at, the chart is showing the temp range 77-86 was the best and quickest temp range for spouting and the fringe temps of 68 and 95 still allowing for fair germination rates.
So, I think I'm okay. I'll keep you posted.
That said it got me wondering and I came across this chart that I'm sharing for THP community.