Correct temperature setting for Seedling Mat?

What is the correct amount of degrees above ambient temp that I should be setting my seedling mat to to germinate seedlings with greatest amount of success?

Vivosun mat factory set to max (20 degrees F) above ambient.

Not all seedlings have sprouted up yet despite healthy germination before being put in rapid rooter tray.

Is there a set temp above that is recommended for cannibis?

75 to 80 is optimal

Ty for answering

i have read that some strains from warmer climates need higher temps and like 90 f but i don't want to go over that plants die at 100
cannabis seeds will germ in 60 -90 best grow room temps tend to be 78 and seeds are said to benefit from a little warmth so i am aiming for 80 , 84 and will be using my heat mat when my lights are off to maintain close to even temps . so far i haven't got the timing just right and it goes down to 75,77 but i think this is ok for a few hours as it would in nature and some kinds of plant seeds do benefit from cooler nights .
67 - 78 - green house seeds.nl
70oF to 90 growingmarijuana.com
strain dependent.

Agreed from what I've read and the little exp. points I got starting seeds and growing.

I've had too many seeds for my liking succumb to mold in Rapid Rooters while in germ dome which I believe to be from my not venting correctly at the early life cycle.

usernamereview said:

Agreed from what I've read and the little exp. points I got starting seeds and growing.

I've had too many seeds for my liking succumb to mold in Rapid Rooters while in germ dome which I believe to be from my not venting correctly at the early life cycle.

Click to expand...

Cool. Yea i don't use a dome usually as it is not needed for anything like humidity and in my climate i have had issues with the dome traping to much heat . I was thinking about using it now in winter but not sure myself. I did get a separate tiny dome/box thing from the seed bank i may try . Is that like what you have ? Or is it like a clone dome?

I got both a 4" & 7" dome. It's trapping too much and causing the rooters to inhibit a mold at tap root.

I don't need to use domes anymore while starting rooters in grow room. Overkill it is.

10F above ambient to 90F mat temp, and not higher then that.....I always put a towel down between my mat and my container......

Thank you for the way to cusion The heat!

In mycology, I've found that going much higher than 75°F will more often lead to a contamination in any damp substrate. I'd say target 70-75°F but wouldn't go above 80°F.