I have some land in Strawberry Valley CA, in the foothills of the northern sierra. Winters are extremely wet and rainy, with occasional heavy but quick melting snow. The problem is summers are bone dry, as most summer thunderstorms, while rare, only occur in the southern high sierra where convection is much stronger.
I have plans to plant a few non natives here(Fruit trees, Sugar Maple, Amur Maackia, and many others), which arent well adapted to the dry summers, but i know its possible. Is there any way to mound or trench the soil in a way to capture as much winter rainfall and store it so the plants can use it during the hot dry summers?
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