How many hours?

I do the same of @Roberts

Soak than peat pellet here works every time use the water heater works every time I like using peat pellets easier not to drown the young plants once I see the roots emerging I use great white killer roots helps transfer into new homes or final homes your choice

I do 24 hours in a cup then straight into moist substrate. Place. Dome over it and have a sprout in 2 to 4 days.

Hi you want to check it every 12 hours once it's in the zipped bagged. Wait till the tap root is out the shell before placing in your chosen medium. Hope this helps.👍