in Thoreau’s Journal:

One who walks the woods and hills daily, expecting to see the first berry that turns, will be surprised at last to find them ripe and thick before he is aware of it, ripened, he cannot tell how long before, in some more favorable situation. It is impossible to say what day—almost what week––the huckleberries begin to be ripe, unless you are acquainted with, and daily visit, every huckleberry bush in the town, at least every place where they grow.