Bedfordshire,
United Kingdom 
Can any one tell me why my English walnut tree is dropping all it's leaves?
It looks healthy and has 'baby' nuts growing on it but my garden is covered in its leaves
26 Jun, 2010
When a tree is suffering from the effects of drought it will drop its leaves to stop more water loss through evapotranspiration. I suggest you water the tree thoroughly and regularly, especially during this sustained drought we're having.
27 Jun, 2010