Mulberry new leaves dried out and brown edged.

Delia starts with ...
Dear all,

Does anyone know about what is happening to my new plant Dwarf Mulberry?

I received it last week. And I plant it several days ago. I'm in Melbourne. However, I found the new leaves are all dried out, and other leaves have brown edge. I put a lot of bone&blood powders beneath the pot. Do I just need to wait or have to dig them out to plant it again?

Thanks a lot.

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Delia says...
Dear Waterfall, Thank you! I was worried about it was because of the bone&blood powder, which caused fertilized burn. But it seem ok during these days. So I guess it is because of the winter.
Thanks a lot.