2 up in 24 hrs! Trying to beat old record of 100% germ in 38 hrs, so I'm hoping for 36 hrs. Could still happen. Soil heating mat, price (3yrs ago) $48.00, size 9" x 19". Pricey? Yeah....but worth every penny! Haven't been without at least one in around 30 yrs & would hate to do without. If you can afford it, try one. You'll be glad you did! Statement in a previous post may have been misleading. Thats not USUALLY 100% germ in 24-36 hrs, but a few at a time germing begining at 24-36 hrs, but with heating mat, all germ within 2-3 days. Another big bonus with heating mats. When the soil is moist, but too cold to germ seeds, the possibility of dampening off goes WAY up. So really big boon having gentle bottom heat. Most take seed flats off the mat as soon as seeds are up & nice & green. I leave mine on untill seedlings are big enough not to be effected by D.O. so the worse that ever happens to mine is me dropping something on them or... Sam (cat) getting the top off the tank & EATING them! Ok, off to do some chores!