First, I soaked the seeds in water for 24 hours. After 24 hours I planted the seeds in seedling pots (Easy Start) from RQS. Then I planted the seeds together with the seedling pots in 4-liter fabric pots. I covered the planting areas with plastic cups to create a small greenhouse. Within the next four days, all the seeds have germinated. I had to remove the seed coat (watermelon) with tweezers.
I used pre-fertilized potting soil.
Room conditions:
Temperature: 22° C
Air humidity: 40 - 50 %