Your growing area plays a big part in what will work in germinating the seed. High humidity means the soil won't dry out as quickly. A dry climate means they will dry out very quickly.
If you are using a potting mix, or seed starting mix you wouldn't have to worry about pasteurizing the planting medium. And I would think you would want to use a mix that would mimic their natural type of growing medium.
Let's see if
@tarev can give us advice on what to do.
