Generally, the protothus will grow out of the pot soil surface in about 1 month. It is important to keep the pot soil moist and do not remove the glass. After 1-2 months, the spores will grow into the fern body. At this time, the glass can be removed, but it is still necessary to avoid direct exposure to strong sunlight. When the plant grows to about 15 cm, it can be thinned out and the new plant can be transplanted to other breeding trays.