1. Charm pot to heat itself. Check
2. Fill half of pot up with soil and let it rest for several minutes to warm up. Check
3. Carefully take a single fire seed with dragon hide gloves and place on top of the soil.
4. Cover fire seed with soil, so that pot is filled. Pat the soil down a little (not too much, you don't want to suffocate it).
5. Water the fire seed with boiling water, without drowning it
Nate felt the pot and it cooled down enough for him to move on to the next step. Which was putting in the fire seed and planting it. Nate took a seed. And he placed it on top of the soil.