Zone 5 with soil rich with humus.

I have a new charcoal grill and one of the features is a pan underneath
that collects the ashes. I hate to waste something that may be useful,
so I did some reading and found that the ashes are a good source of
potassium, which may be useful in the garden. We grow cherries,
blueberries, and strawberries, corn, beets, tomatoes, and beans. Where
would be the best place to spread my ashes?