Deer populations can also be managed through hunting. I read conflicting information online. Keep these pointers in mind: NOTE: This is part 7 in a series of 10 articles. Pruning walnut trees help shape and train them to grow in a desired pattern. Illinois study comparing deer repellent products (Illinois Walnut Council), Comparison of Commercial Deer Repellents (USDA APHIS, July 2001). Black walnut trees do not prune themselves readily. In fact, I expect more trees have been pruned during this time frame than all other times of year combined. By Lenny Farlee, Extension forester, Hardwood Tree Improvement & Regeneration Center. Crop tree management (CTM) is a relatively simple and easy to use tree management system well-suited to small woodland ownerships. More... Thinning is one of the most important silvicultural practices available to tree growers. Comparison of Commercial Deer Repellents (USDA APHIS, July 2001). For a complete background on how to grow walnut trees… For further information, Planting and Care of Fine Hardwood Seedlings is a series of 20+ guides developed by the Hardwood Tree Improvement & Regeneration Center. A black walnut tree (Juglans nigra) is grown for its nuts and its wood, which is used to make lumber. They rob them of moisture, nutrients, and light. More... Pruning and Thinning are two management techniques which can lead to higher quality stems. That said, there are no commonly known issues (insect or diseases) with pruning … Most of the poorest trees have already been removed. The pruning of a black walnut does not have great secrets, having to carry out the same pruning as in a common walnut tree. Young black walnut trees may fork or produce multiple leaders when their terminal shoots are damaged by frost, insects, animals, or humans. Deciding when and how much to thin requires some care. Pruning walnut trees (grown for nuts or wood) takes place when the trees are still in dormancy. Pruning walnut trees help shape and train them to grow in a desired pattern. Walnut trees (Juglans spp.) Pruning black walnut is an art, and this bulletin is intended to provide guidelines, not solutions, for all possible situations. If deer damage is a serious problem, you may need to install fencing or consider deer repellents in the short run. The British and Europeans believe that summer pruning of black walnut trees is the better time. If so, your stand may be stagnating; and the first step in revitalizing it is to look for the cause. Corrective Pruning. As stated in the Planting Walnut Trees guide, commercial walnut growers often plant densely a great number of trees, so that in 8-12 years they can start thinning some of them (remove them from the orchard) and keep the most vigorous and healthy trees. Chemical analysis of walnut leaves can indicate current nutrient element levels of the trees and suggest probable response to fertilization. Pruning black walnut trees . That is why I found it interesting to devote a small section to answering this query. That said, there are no commonly known issues (insect or diseases) with pruning … But walnut growers can use a variety of mechanical and chemical methods to protect their trees from weeds. It is particularly important with black walnut because walnut trees differ widely in value, depending on their quality and size. Black walnut trees generally grow singly or in clumps in natural stands. 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. The tree will still use these "temporary branches" to add taper (diameter) and strength to the trunk of the tree. See the full article here. make very nice shade trees, are excellent timber specimens, and also produce delicious nuts for eating by humans, birds, and squirrels alike.Keep reading to learn how to prune a walnut … Since each tree in each plantation and each owner is different, none of the photographs provided will look exactly like your trees. But pruning can also cause a tree to grow more slowly by removing part of its food manufacturing plant, the crown. The tree will still use these "temporary branches" to add taper (diameter) and strength to the trunk of the tree. At this point, you can begin shaping the tree into the central leader position. Walnut tree pruning is important for the tree’s health, structure, and productivity. Advertisement. Corrective pruning may help create a dominant terminal shoot and lateral pruning helps create a defect-free log by eliminating branches. Young black walnut trees may fork or produce multiple leaders when their terminal shoots are damaged by frost, insects, animals, or humans. 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 defect-free wood can be produced only after a branch has fallen off the tree or been removed. The descriptions below can provide information on each technique. I have 2 large trees that are multi-trunked, and I plan on reducing each to a single trunk. Illinois study comparing deer repellent products (Illinois Walnut Council) Pruning also invigorates the tree… Dear Ms. S., you can prune back your walnut tree. walnut trees from late winter to early spring (February-April). The ideal ground cover in a black walnut plantation would be similar to that in a dense mature forest or mixed black walnut stand. Purely from a theoretical standpoint, the best time to prune Black Walnut is in the dormant season. Source: St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. 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. More... One thing that makes some walnut wood valuable is something it doesn't have: defects. More... Information adapted from Walnut Notes, Burde, E. Lucy, 1988. For individual trees in natural stands, release is the most important and worthwhile silvicultural treatment you can apply. There are many questions about how to prune a black walnut tree. Because a walnut tree must develop a single, straight stem for valuable lumber or veneer, corrective pruning is often needed to remove lateral branches that compete with the terminal for dominance. Many fertilization studies have been done, but the results have been inconsistent and hard to compare. The professional world is merely divided on the best time at which to conduct the pruning. Reprinted from the December 2013 issue of the bulletin. After trees have been planted there are a few management techniques that will ensure the most productive and healthy crop. 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. More... Has your plantation or natural stand of black walnut trees stopped growing rapidly enough in height and/or diameter to meet your objectives? Weeds affect black walnut trees the same way they affect other crops. Unless other factors are limiting (and this is often the case), irrigating such sites may help to maintain tree growth during periods of inadequate precipitation and/or high evapotranspiration. Fertilizing pole-size and larger trees is likely to provide the best economic return. Some sites don't have enough moisture to grow good black walnut trees. Prune the tree when it is 1-2 years old into the central leader position. 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. The theory is to prune before the growing season so the wound will cover faster. The reasons for this are: If you are too late when pruning back your tree in the winter, the cut wounds will bleed. After about 1-2 years of growth, your walnut tree should have its basic form. Aparently Walnuts are kind of a sappy tree and I've read of waiting until after leaves develop to prune … To make the most of their potential value, you'll need to give these trees some “elbow room” from nearby trees and vegetation that compete with them for moisture, nutrients, and growing space. 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. Unfortunately, when a plantation is established, regardless of the type of site preparation, the walnut seedlings will not be tall or dense enough to shade out the vegetation that competes against them. Purely from a theoretical standpoint, the best time to prune Black Walnut is in the dormant season. Taking does is critical to control the herd size.