These Phrag. besseae seedlings had been deflasked for 10 days. The agar was removed carefully without disturbing their entangled roots. They were put as a compot with very loose packed sphagnum moss as the media. The light was nearly 500 fc for 12 hours a day. The humidity should be high, because I put a cover dome on the whole pot and ventilated occasionally. The temperature was kept around 25℃.They seemed to be good. The problem is why the leaves became gradually curved?