If you live in a COOL Climate zone, we highly recommend you get yourself a couple of these. They are like an electric blanket for seeds and cuttings. (Would also be beneficial in Temperate zones during winter)
One of the tricks commercial nurseries use to get cuttings to take well is to heat the beds. It seems that plants dont like having cold toes either!
The same goes for sprouting seeds. Keep the soil warm and they will be happy to wake from their hibernation.