Optimal germination temperatures for most seeds are higher than those needed for seedlings to grow.
Optimal germination temperatures for most seeds are higher than those needed for seedlings to grow. Room temperature is sufficient for germination of many seeds, and most seeds will germinate at room temperature eventually, they will just take longer. But the optimal germination temperature for warm season vegetables - like tomatoes, peppers and eggplants - is higher than room temperature. Using a heat mat speeds up the germination process and increases the germination rate of these warmer season crops. I’ve used this heat mat for years and love it. If you don’t have the budget for a mat, try using a warm place in your home - like the top of the refrigerator, on the dryer or above a radiator.