I have been growing hot peppers for many years without problems but this year I had a lot of trouble. I started all my seeds, (Trinidad scorpion, Big Bomb hybrid and some kind of Chili pepper) All but the scorpions germinated In the past I did not use a heat mat and I put the seeds in plastic containers and used the usual seed starting mix. this year I got the heat mat and left in on 24/7 and I bought those jiffy pots. all my other plants, tomatoes eggplant are dong grate but the scorpions never came up. I had no idea that hot p[pepper seeds don't last long so maybe that's why my scorpions never germinated. I buy all my hot peppers seeds from a place in Australia and I have never had a problem with time. I think these seeds were 2 or 3 yeas old.