Black walnut is a large, broadleaf tree which can reach 30–40m high. Sometimes black walnuts won't grow terminal leaves at all. These leaflets are serrate or toothed. Generally, the walnuts you see on your supermarket shelf are the English variety. The Claro walnut mentioned by others is a hybrid of the English walnut onto our native black walnut stock, and is available more readily on the west coast. Claro walnut usually commands a premium price and would be quite unlikely to just be sold as just as plain walnut, especially in the East. The tree gets its name from its dark, heavily ridged bark which occurs even when it is still young. Composting Walnut Material. Easy to crack open, they add taste and texture to cookies, cakes, yogurt, cereal and oatmeal, salads and vegetables. Identified in winter by: the segmented pith, or spongy tissue, inside the twig. Walnuts are specifically deciduous trees, 30 to 130 feet tall with pinnate leaves containing five to 25 leaflets. English walnut trees also have a large terminal leaf, but with smooth (not serrated) edges. Fruit should be composted longer, and it may even be a good idea to remove it from the garden if you get a lot. Those who are willing to achieve their healthy lifestyle goal must have added walnut as part of their daily diet especially during pregnancy because one of the health benefits of walnut during pregnancy is good for the development of baby’s brain. Walnut tree leaves: English walnut tree’s pinnate leaves contain between 5 and 9 leaflets, and they always have a single blade at the tip. English vs. Black Walnut. The toxic effects of juglone are gone in about four weeks. You can usually find them in forests stretching from the east coast of the United States to the Midwest. Butternut walnut trees have a large end leaflet, sticking out in-line with the twig. Walnut is one of the healthy snacks. Just like the name implies, they produce walnuts, making them very valuable plants. The actual leaf is attached to twigs in a mostly alternate arrangement and the leaf structure is odd-pinnately compound—meaning that the leaves consist of an odd number of individual leaflets that attach to a central stem. Compared to butternut and black walnuts, there are fewer leaflets on English walnut trees. Crushed leaves have a strong smell. Black walnuts are native to America, and they have a thicker shell and a more potent flavor than the milder English ones. Individual leaflets are 4” to 7” (10 – 18 cm) long. Black walnut trees are some of the most widely-grown trees in North America. mrfu | May 12, 2008 05:39pm | #10. In my experience squirrels do this for you, and then they bury the nuts where you don’t want them. Black walnut leaves have a much smaller leaflet protruding from the tip of the twig. Harder-to-find black walnuts have a bold, earthy flavor and require a lot of work to get them out of their shells. Walnut Wood Chips. Look out for: the leaflets which have toothed edges. The hull is often used to make an anti-bacterial black walnut tincture, as well as being a key ingredient in making homemade black walnut ink. Leaves and branches should be removed from gardens and composted.