As nuts ripen, the husk changes from solid green to yellowish green. Monitor weekly for maturity of nuts. Try to harvest directly from the tree to get ahead of the squirrels. If nuts are too difficult to reach, collect them as they fall to the ground. Remove husks prior to storing.
Plants grow best in a sunny location.
They'll tolerate partial shade, but will produce less fruit. If you have highly alkaline soil you probably can't grow them. For northern gardens, recommended cultivars are Northblue, Northcountry, Northsky and St. Cloud. Plant more than one variety for pollination. Prepare soil and plant young bushes in late April or early May, three to four feet apart, in a large hole to encompass all roots, and water thoroughly.