@FatCobra, Hello. I hope the translation doesn't distort the words too much.
The recommended humidity values in the vegetative phase are around 70%, in flowering around 55/60. If you have no way to buy an ultra sound humidifier, wet the soil more often (not with more water, only more often, when you see the surface begin to dry. Glasses of water are also fine, the important thing is that the air is not excessively dry.) I do not know that soil, but in the early stages of life and growth, a soil that is not too fertilized is recommended, otherwise the taproot will "burn" even before it comes out of the seed. I hope I was helpful 😊
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