Carefully open the pop-up soil without damaging the packaging and pour about 300 ml of water into
it. After 2 or 3 minutes the soil will be swollen and feel quite loose – if you notice that the earth in the middle is still rather solid, you can still add some water until it is perfect.
Highly important:
the earth should be moist but not wet. How can you test this? Take some earth into your hand and squeeze it. If water is trickling down, it is too wet and you should let it dry a little bit more before continuing to sow the seeds.