The float test: how to spot high-quality wild nuts

Society · Published 18 October 2026 Swipe more like this →

In short: Not every nut on a branch is worth your effort. Foraging for hickory and black walnuts requires more than just picking them up; you need to know which ones are hollow, infested, or meatless before you waste energy cracking them open.

Identifying high-quality nuts like the shag bark hickory or the black walnut relies on specific physical markers. While many people recognize acorns, these harder-shelled varieties require a more discerning eye. Shag bark hickories are noted for producing some of the best hickory nuts available, identifiable by their characteristic shaggy bark. These nuts are notably difficult to break open by hand. Foragers must look for specific tree types to find the highest quality yields.

A primary method for determining viability is the float test. By placing nuts in water, foragers can quickly sort through their haul: those that sink to the bottom contain a high amount of meat and are desirable for consumption. Conversely, nuts that float to the top are likely hollow or have been compromised by insects and worms. This technique works because heavier nuts have more internal meat. It allows you to quickly discard older, empty shells that squirrels might leave behind.

Timing also plays a critical role in foraging black walnuts. For the best results, they should be harvested while still green and then dried manually. If left too long on the tree, they may become infested with pests. Beyond their culinary value—where roasting them over a fire is recommended to enhance flavor—black walnuts also serve as a source of a deep, inky dye suitable for staining cloth or creating camouflage. While the insects inside are technically edible, they often result in a less desirable meal. You can also use the juice from these nuts for various coloring purposes.

Foraging these nuts provides more than just food; it offers utility. Because they are highly sought after and popular with squirrels, they are frequently used as bait. However, the process requires patience to move past the outer mushy layers of certain varieties to reach the hard nut inside. The roasting process is particularly effective for maximizing their delicious flavor profile. This makes them a popular choice for culinary demonstrations on television.

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