Humboldt Seed Company - BlueBerryMuffin & LemonGrass

All 5 of my seeds have germinated and are above ground as of April 26th- 7:55am. That is exactly 72 hours which is how long it usually takes me. So this grow I decided to try starting half my seeds in seed starting mix and the other half in fox farm happy frog as usual. I noticed the first seed that broke dirt was in the seed starting mix so i may start using that to start my seeds. Im just wondering if the nutrients in the soil last as long as happy frog? But Ive decided that doesnt matter because ill be transplanting before it matters.