1, the soil in the basin is too dry, which causes the leaves to droop, yellow and fall off. Because duckweed is not drought-tolerant, keeping the basin soil moist is the key;

2, the pot soil is too wet, leading to rotten roots. You can take duckweed out of the pot, remove the soil, then cut off the rotten roots, replant new soil, water it and put it in the shade.

3. excessive fertilization caused root burning. Take the palm out of the basin, wash the roots with clear water, rinse them several times continuously, then soak the roots in clear water, and replant them with new soil after the leaves are restored;

4, insufficient fertilization, Liriodendron has certain requirements for fertilizer, especially in the growth period, if insufficient fertilization, Liriodendron leaves will turn yellow and fall off;

5, too little light, Liriodendron likes semi-cloudy days, generally cultivated under bright scattered light, if the room is dark, it will affect the growth of Liriodendron, leading to yellowing and defoliation;

6. Too strong light is also one of the reasons for the lodging of Liriodendron chinense leaves. The leaves of Liriodendron chinense are easy to wither and fall off in the sun.