Soil and nutes...

I’m starting my grow in pro mix soil until I put them outside in June. Then they will be transplanted into beds of well rotted mushroom compost. Am I right that I will not need any nutrients with pro mix?

I have advanced nutrients
Micro, grow,bloom, big bud

But will I need to use them?

Any help would be great!

Thanks in advance!

it depends which pro-mix but the most popular types are inert and seedlings would need nutrients after 10 days or so clones even sooner.