Are the following soils/ ingridents

Can I mix the following soil/ingridents for a seed to plant, are they to strong? Just for a seed.

1 Bag Organic Potting Soil
1 Bag Perlite
1 Bag Vermiculite
1 Bag Peat Moss

If i mix them all, and then use it as the soil to plant my seed in.

To strong? Suggestions

that should do jus fine i use fox farm ocean forest and its already "hot"

perfect ingredients

Another quick questions experts

When should I use nutrients and what kind.

Okay i would say after the third true set of leaves and i use organic teas for nutes (best i ever used)