Pruning Walnut Trees. More... Pruning and Thinning are two management techniques which can lead to higher quality stems. More... Thinning your black walnut stand the second time is much like thinning it the first time except that you face tougher decisions about which trees to keep. There are many questions about how to prune a black walnut tree. Dear Ms. S., you can prune back your walnut tree. At this point, you can begin shaping the tree into the central leader position. Managing deer damage is important to allow newly planted seedlings to get above the browse line. Reprinted from the December 2013 issue of the bulletin. Thinning reduces competition, allowing the best trees to get the resources, but early on that competition is critical to force the trees to grow straighter with few branches, so timing is critical. But keep in mind: it probably won't pay to irrigate just to increase the value of merchantable trees. Hello, When is the best time to prune Black Walnut trees? Since each tree in each plantation and each owner is different, none of the photographs provided will look exactly like your trees. If so, your stand may be stagnating; and the first step in revitalizing it is to look for the cause. walnut trees from late winter to early spring (February-April). The theory is to prune before the growing season so the wound will cover faster. But defect-free wood can be produced only after a branch has fallen off the tree or been removed. That said, there are no commonly known issues (insect or diseases) with pruning … Weeds affect black walnut trees the same way they affect other crops. Illinois study comparing deer repellent products (Illinois Walnut Council), Comparison of Commercial Deer Repellents (USDA APHIS, July 2001). Walnut trees (Juglans spp.) Most potted nut trees need very little initial pruning, but as the trees get older, corrective pruning may be necessary. Pruning also invigorates the tree… Corrective Pruning. After trees have been planted there are a few management techniques that will ensure the most productive and healthy crop. Deciding when and how much to thin requires some care. Some sites don't have enough moisture to grow good black walnut trees. Advertisement. Many fertilization studies have been done, but the results have been inconsistent and hard to compare. Purely from a theoretical standpoint, the best time to prune Black Walnut is in the dormant season. A black walnut tree (Juglans nigra) is grown for its nuts and its wood, which is used to make lumber. In fact, I expect more trees have been pruned during this time frame than all other times of year combined. For a complete background on how to grow walnut trees… See the full article here. I read conflicting information online. But walnut growers can use a variety of mechanical and chemical methods to protect their trees from weeds. More... Thinning is one of the most important silvicultural practices available to tree growers. By Lenny Farlee, Extension forester, Hardwood Tree Improvement & Regeneration Center. Thinning a walnut stand can greatly increase its value by making all the moisture, nutrients, and light available to a few high-quality trees and by removing the low-quality trees. Pruning black walnut trees . That is why I found it interesting to devote a small section to answering this query. Don't fertilize walnut trees on good sites, it doesn't seem to help the trees grow; but it does help weeds grow, which then suppress walnut growth. Pruning removes weak or dead branches that either take away from the overall shape of the tree or would not be strong enough to support a heavy load of nuts. Taking does is critical to control the herd size. The British and Europeans believe that summer pruning of black walnut trees is the better time. Pruning walnut trees help shape and train them to grow in a desired pattern. They rob them of moisture, nutrients, and light. Chemical analysis of walnut leaves can indicate current nutrient element levels of the trees and suggest probable response to fertilization. Young black walnut trees may fork or produce multiple leaders when their terminal shoots are damaged by frost, insects, animals, or humans. Illinois study comparing deer repellent products (Illinois Walnut Council) Deer populations can also be managed through hunting. More... Fertilization is perhaps the least understood of all the cultural practices associated with managing black walnut trees. Keep these pointers in mind: NOTE: This is part 7 in a series of 10 articles. Most of the poorest trees have already been removed. Corrective pruning may help create a dominant terminal shoot and lateral pruning helps create a defect-free log by eliminating branches. The descriptions below can provide information on each technique. The professional world is merely divided on the best time at which to conduct the pruning. Even small branches tend to leave stubs when they die, and large branches may hang on the tree for many years after they die, so lateral branches must be pruned to produce high-value, knot-free wood. Black walnut trees do not prune themselves readily. Crop tree management (CTM) is a relatively simple and easy to use tree management system well-suited to small woodland ownerships. The reasons for this are: If you are too late when pruning back your tree in the winter, the cut wounds will bleed. The pruning of a black walnut does not have great secrets, having to carry out the same pruning as in a common walnut tree. You should also observe that the younger branches of walnut trees … The tree will still use these "temporary branches" to add taper (diameter) and strength to the trunk of the tree. But pruning can also cause a tree to grow more slowly by removing part of its food manufacturing plant, the crown.