why has my salix verve’s leaves started to be dry and papery and fall off

Question

I grow it in a pot in semi shade

Answer 1

If the container has no drainage holes or it remains wet for long periods of time in a confined container, it likely has contracted a fungal infection. Be sure and let the soil dry out between waterings. Papery leaves also can be attributed to lack of moisture, too much fertilization, or sensitivity to chlorine and minerals in the water if it isn't getting rainwater.