The end of August to late November is walnut harvesting season. They are available in the shops year-round; but if you are lucky enough to live near some walnut trees now is the time to go foraging.
Interesting facts about walnuts!
-The word 'walnut' comes from the Old English word wealhhnutu, literally meaning 'foreign nut'... because it was originally introduced from France and Italy.
-The best known variety is the Persian Walnut (also called the English Walnut), one which has a large nut and thin shell which makes it more suitable for eating than other varieties, such as the Eastern Black Walnut which has an extremely tough shell and smaller nut.
-The world's largest producer and exporter of English Walnuts is California's Central Valley.