We have a curry leaf plant in our yard which seems to be under distress. The leaves seem dry and light coloured and the branches are bending downwards. It’s in full sun, watered regularly and I even added a slow release organic fertiliser recently. The other plants around it (lemon tree, hibiscus, mandarin, camellia, gardenia, etc.) seem to be thriving but not this one. Any help in understanding the cause would be really appreciated. Thanks.