It has been an accepted article of faith among horticulturists that juglone, a chemical compound associated with black walnut roots, inhibits the growth of certain plant species growing nearby. Volume 78, November 2014, Pages 76-82. General tips for planting around black walnuts include: The following lists of plants tolerant to juglone were compiled from published sources. Choose juglone-tolerant plants. Purdue Univ. You must login or register to add items to your wishlist. Stay tuned for the first newsletter in the morning, straight to your inbox. Cherry trees are notoriously finicky. In The Suburban Micro-Farm, Modern Solutions for Busy People, Amy Stross points out that walnuts are nutrient accumulators of potassium and phosphorous, making the walnut a treasure in a permaculture garden. 0000072034 00000 n %%EOF We're Donating 3% of all sales to Wild Ones. However, some of these juglone resistant plants may grow even better when planted where there is no juglone present, even though they can tolerate some juglone. Web49 Flowers for Planting Under a Black Walnut Tree Anemone (Anemonastrum) Aster False Goats Beard (Astilbe) Bee Balm (Monarda) Begonia Birthroots (Trillium) Black-Eyed Susan (Rudbeckia hirta) Bleeding Heart (Lamprocapnos spectabilis) Bugleherb (Ajuga reptans) Common Bluebell (Hyacinthoides non-scripta) Common Cinquefoil (Potentilla canadensis) Learn how The Morton Arboretum is ensuring the future of trees through leading-edge science and conservation. University of Maryland. When plants produce a chemical that prevents the growth of other plants, it is called allelopathy. They, like many other sun-loving plants, are more likely to perform poorly because of the shade of the walnut tree rather than the juglone. Most plant species with conflicting information regarding their sensitivity or tolerance to juglone have not been included in the table. Arbuscular mycorrhizal fungal hyphae enhance transport of the allelochemical juglone in the field. WebThe Curse of the Black Walnut. https://extension.illinois.edu/blogs/garden-scoop/2018-08-23-black-walnut, [4] KUO-CHUAN LEE. WebBlack Walnut Toxicity | Causes, Tolerant and Susceptible Plants| The Morton Arboretum Plant Selection Black Walnut Toxicity Find more information and trees and plants tolerant of black walnut toxicity. There are many other plants, however, that are not impacted by juglone. stream What do the effects of black walnut toxicity look like? Black walnut (Juglans nigra) and butternut (Juglans cinerea) are the landscape plants most recognized by gardeners as being problems for their other plants. I am often asked to suggest plants that will perform well in specific cultural conditions or that offer unique characteristics. WebIn this area, plants susceptible to juglone may wilt or die; plants tolerant to juglone will grow normally. The toxic chemical the possess is called Juglone. While plants with a greater juglone tolerance might grow under the There are over 200 species of vegetables, flowers, and trees that are not harmed by Juglone, the poison that is emitted from Black Walnut tree roots. Knowing which plants can thrive along side Black Walnut trees is important to have a successful garden or flower bed. Juglone-Tolerant Plants That Pollinators Love. 0000010429 00000 n Welcome to Growit Buildit! Some shrubs like lilac, hydrangea, rhododendron, viburnum, and yew are also considered somewhat sensitive to juglone. Black walnut trees (Juglans nigra) produce a toxic substance (called juglone) that prevents many plants from growing under or near them. Some shrubs like lilac, hydrangea, rhododendron, viburnum, and yew are also considered somewhat sensitive to juglone. Furthermore, while many plants can grow well in proximity to a black walnut, the growth of some plant species is thought to be inhibited by this tree. Alternatively, some plants may survive for years near a young walnut tree, but will wilt and die as the tree increases in size. Copyright 2015 - 2022 Mike Heger/Ambergate Horticultural Consulting | All Rights Reserved, Fothergilla x intermedia Blue Shadow USPP 15490 (Witch Alder). Matthias C.Rillig. Locating gardens well away from black walnuts. Black Walnut trees emit a toxic substance called Juglone that kills certain plants that grow near them [1]. What is black walnut toxicity? Sensitive plants located beneath the canopy of a walnut tree are most susceptible to contact with juglone through direct root contact or accumulation of the toxin from leaves and nut hulls in poorly aerated, wet soils with limited microbial activity and organic matter. Cherries ( Prunus spp.) The highest concentration of juglone occurs in the soil directly under the trees canopy, but highly sensitive plants may exhibit toxicity symptoms beyond the canopy drip line. Make sure the plants get at least six to eight hours of direct sunlight each day to help battle any toxins from the black walnut tree's drip line. Most toxicity symptoms arise when juglone-sensitive plants are placed within the walnuts root zone, an average of 50 to 60 feet from the trunk of a large tree. He with a love & extensive self-taught knowledge ofNATIVE PLANTS,GARDENING, and woodworking. Some plants are either stunted, die, or cant germinate near Juglone. These plants can grow near, or within the canopy of a Black Walnut Tree. 0000112419 00000 n I hope to share some of my knowledge with you! Galium odoratum Sweet woodruff. There are over 200 species of vegetables, flowers, and trees that are not harmed by Juglone, the poison that is emitted from Black Walnut tree roots. Selecting juglone-tolerant plants Landscaping Near Black Walnut Trees Black walnut trees (Juglans nigra) can be very attractive in the home landscape when grown as shade trees, reaching a potential height of 100 feet. WebThe purple coneflower (Echianceae purpurea) is tolerant of USDA zones 3 through 8. WebAs with any evolutionary process, some plants have been documented to be tolerant of Juglone. 0000009973 00000 n The walnuts they produce are a food source for squirrels, other wildlife and people as well. I have developed these lists over a period of many years based on my own experience and that of other knowledgeable gardeners. What plants die from growing near Black Walnut Trees? Web49 Flowers for Planting Under a Black Walnut Tree Anemone (Anemonastrum) Aster False Goats Beard (Astilbe) Bee Balm (Monarda) Begonia Birthroots (Trillium) Black-Eyed Susan (Rudbeckia hirta) Bleeding Heart (Lamprocapnos spectabilis) Bugleherb (Ajuga reptans) Common Bluebell (Hyacinthoides non-scripta) Common Cinquefoil (Potentilla canadensis) Allelopathic effects of Juglone and decomposed walnut leaf juice on muskmelon and cucumber seed germination and seedling growth. Join in The Morton Arboretum's mission to plant and protect trees for a greener, healthier, and more beautiful world. There are many other plants, however, that are not impacted by juglone. link to Solomon's Seal, A Complete Guide To Polygonatum spp. I am often asked to suggest plants that will perform well in specific cultural conditions or that offer unique characteristics. 0000011473 00000 n 1967, I. Terzi. There are certain bacteria that can feed solely on Juglone [6], which is likely a large component of the variation. In addition, the plant lists in this table are by no means exhaustive. 0000002069 00000 n Some plants have shown a tolerance to juglone under various settings. WebFew plants have been experimentally tested for tolerance or sensitivity to juglone. No juglone sensitive trees should be planted within 50 to 80 feet (15 to 24 meters) of a mature black walnut tree. This list contains all documented vegetables, flowers, trees and shrubs that are impervious to Black Walnut toxin known as Juglone. Hi - I grew up outdoors in nature - hiking, fishing, hunting. There are many other plants, however, that are not impacted by juglone. Know Before You Go: Important information and helpful hints for your next visit. Allelopathy is where a plant secretes a chemical that will inhibit the growth of surrounding plants. For now, feel free to continue reading. So, the bacteria known as Pseudomonas putida J1 was found to to break down Juglone rapidly if soil was aerated. Understanding the site to be landscaped or developed into a garden is the first step in assuring successful plantings. EARTH DAY: this week, We're Donating 3% of all sales to Wild Ones! Retrieved 29OCT2020. Plants Observed to Be Sensitive to Juglone Vegetables: asparagus, cabbage, eggplant, pepper, potato, rhubarb, tomato. Other trees closely related to black walnut, such as butternut, pecan, shagbark hickory, and English walnut also produce juglone, but at concentrations lower than black walnut. By thoroughly researching University and Science Journal publications, Ive compiled a comprehensive list of Plants tolerant of Black Walnut Trees. 0000076048 00000 n WebFew plants have been experimentally tested for tolerance or sensitivity to juglone. Identifying your trees and shrubs will help avoid problems with allelopathic toxicity among your future landscape and garden plantings. Landscaping and Gardening Around Walnuts and Other Juglone Producing Plants, Skip to the beginning of the images gallery, Growing Gardeners: Plant Parts Tops, Bottoms, and Middles, Penn State Extension Master Gardener Manual, A Guide to Preserving Trees in Development Projects. Many factors affect sensitivity, including level of contact, health of the plant, soil environment, and the overall site conditions. Much of what is known is based on one study done many decades ago. Maple Trees are one of the most popular and commonly used trees used for landscaping in the United States. 1988 Jul;14(7):1561-71. doi: 10.1007/BF01012522. Come discover lush, green landscapes, and find respite and inspiration in the shade of towering trees. Black Walnut trees produce achemical called hydrojuglone, which isfound in the leaves, stems, fruit hulls, inner bark and roots. Note that black walnut toxicity due to juglone has not been studied in depth. 0000008463 00000 n x]q}W\?^t*~Ya=$9n. ZNIZE6*%rueWo_?Mmq?~?fz{C3VqM5Co_p::>BUFIwuWO_OgRLKCmxqZOg~pM\s8u]l?G0~~^?xhyzL?gZd}P&)6fhc&Vrb.2ft7~>~o]gXWkmuvdk6sri[aX t*t;dh)3=uP0cSu#oDoWSO?PZ~'p3i*i?h;'4O{~. %PDF-1.4 Annuals Pot Marigold Begonia, fibrous cultivars Morning Glory Pansy Viola Zinnia species Most other annuals Vegetables Squashes Melon Beans Carrots 0000002614 00000 n Solomon's Seal is one of the most beautiful curious woodland wildflowers one may encounter while on a Spring or Summer hike. Walnut Toxicity Update. That doesnt mean your black walnut must stand alone in the back yard. Note that black walnut toxicity due to juglone has not been studied in depth. Ext. In high school I got my first job at a garden center where I learned to garden and landscape. Soil Biology and Biochemistry. [4] Dana, M. & Lerner, B. Prepared by Dan Roman, former Northampton County master gardener; and Jim Sellmer, professor of ornamental horticulture. Juglone-Tolerant Plants That Pollinators Love. Plants sensitive to juglone may be stunted, have yellow or brown, twisted leaves, exhibit wilting of some or all plant parts, and die over time. Juglone is toxic to numerous plants, but many native plants are resistant to the toxins. Juglone tolerant trees grow perfectly normally in this situation and, the fact is, most trees fit into this category. Oftentimes the juglone sensitivity or tolerance of specific plants has never been observed or documented. When exposed to the air or soil, hydrojuglone is oxidized into the chemical juglone. Walnuts and hickories produce the chemical juglone (5 hydroxy-1,4- napthoquinone), which is exuded from all parts of the plant. African Journal of Biotechnology. Pachysandra Japanese spurge / Pachysandra. Galium odoratum Sweet woodruff. 142 0 obj <>stream Often, the vascular (i.e., water-conducting) tissue of affected plants will be discolored. Much of what is known is based on one study done many decades ago. Selecting juglone-tolerant plants Landscaping Near Black Walnut Trees Black walnut trees (Juglans nigra) can be very attractive in the home landscape when grown as shade trees, reaching a potential height of 100 feet. Juglone is toxic to numerous plants, but many native plants are resistant to the toxins. WebIn this area, plants susceptible to juglone may wilt or die; plants tolerant to juglone will grow normally. Related trees like butternut (J. cinerea) and shagbark hickory (Carya ovata) also produce juglone, but in lower concentrations than black walnut. There are over 40 different species that die from growing near Black Walnut Trees. Which plants are most sensitive to juglone? WebBy thoroughly researching University and Science Journal publications, Ive compiled a comprehensive list of Plants tolerant of Black Walnut Trees. 0000038263 00000 n To that end, I offer the following lists. What should I do. Many plants (e.g., sugar maple, tree of heaven, hackberries, sycamore, cottonwood, black cherry, red oak, black locust, sassafras, fine fescue, and American elm) produce allelochemicals to enhance their survival and reproduction by inhibiting nearby competition. https://extension.umd.edu/learn/toxic-plant-profile-black-walnut, [10] Black Walnut: The Killer Tree. Black walnuts produce a chemical called juglone, which occurs naturally in all parts of the tree, especially in the buds, nut hulls, and roots. Where To Buy Native Plants In The United States, J. Chem. 0000172578 00000 n Actaea / Cimicifuga (Baneberry, Bugbane) Ajuga (Bugleweed) Anemone quinquefolia (American Wood Anemone) Arisaema (Jack in the Pulpit) Asarum (Ginger) Asplenium platyneuron (Ebony Spleenwort) Aster cordifolius / Symphyotrichum cordifolium (Heart-leaved Aster) Aster macrophyllus / Eurybia macrophylla (Large-leaved Aster) Aster divaricatus / Eurybia divaricata (White Wood Aster) Astilbe (False Spirea) Athyrium felix-femina (Lady Fern) Athyrium niponicum var. The term allelopathy refers to the relationship between plants in which one plant produces a substance that inhibits the growth of sensitive plants nearby. Department of Biology, Faculty of Education, Dumlupnar University, Ktahya, Turkey, [6] Michaela Achatz. I've been growing plants from seed and designing native plant gardens for over six years. Ann Joy and Brian Hudelson, UW-Madison Plant Pathology As with any evolutionary process, some plants have been documented to be tolerant of Juglone. 0000121073 00000 n WebPlants Tolerant of Juglone Trees, Shrubs and Vines Most trees, shrubs and vines can be grown near black walnut trees with little to no effect on the plant health. No juglone sensitive trees should be planted within 50 to 80 feet (15 to 24 meters) of a mature black walnut tree. Serv. Where sensitive plants may survive outside of the canopy of a black walnut, highly sensitive plants may not tolerate small concentrations where decaying roots from a removed tree may still be releasing juglone. In this area, plants susceptible to juglone may wilt or die; plants tolerant to juglone will grow normally. 0000120859 00000 n Make sure the plants get at least six to eight hours of direct sunlight each day to help battle any toxins from the black walnut tree's drip line. While plants with a greater juglone tolerance might grow under the Plants that are not as sensitive may yellow slightly or grow more slowly, but are rarely killed. 0000152177 00000 n JavaScript seems to be disabled in your browser. The best alternative is to choose plants from lists of plants thought to be tolerant of juglone. When exposed to theair or soil, hydrojuglone is oxidized into the chemical juglone. Avoiding mulch containing walnut bark, wood, hulls, and leaves, Most maples except silver maple (Acer spp), Goldenrain Tree (Koelreuteria paniculata), Carolina Silverbell (Halesia caroliniana), Snowball Hydrangea (Hydrangea arborescens), Exbury Hybrid Azalea "Gibraltar" & "Balzac", Pinxterbloom Azalea (Rhododendron periclymenoides), Maple-leaved Viburnum (Viburnum acerifolia), Cherry, Nectarine, Plum, Peach (Prunus spp), Virginia Creeper (Parthenocissus quinquefolia), Spanish Bluebell (Hyacinthoides hispanicus), Virginia Bluebell (Mertensia pulmonariodes), Dutchman's Breeches (Dicentra cucullaria), Christmas Fern (Polystichum acrostichoides), Siberian or Blue Squill (Scilla siberica), Cranesbill Geranium (Geranium sanguineum), Sunflower and Jerusalem Artichoke (Helianthus spp). They are great for supporting wildlife, as they host a variety of caterpillar species and their nuts provide an important source of protein and fats for wildlife of all kinds. The area affected enlarges outward each year as the tree grows. The information contained within may not be the most current and accurate depending on when it is accessed. These plants can grow near, or within the canopy of a Black Walnut Tree. You may be interested to read the 201 different species of plants that are Juglone tolerant, and can grow near Black Walnut Trees. <<2F95676E4A854D4789499B34BDFCC3BC>]/Prev 343685>> 0000054482 00000 n Some shrubs like lilac, hydrangea, rhododendron, viburnum, and yew are also considered somewhat sensitive to juglone. All parts of a black walnut tree contain juglone, including leaves and fruits. 0000001896 00000 n There are other factors that may impact the health of plants and those should be considered before black walnut toxicity is assumed to be the problem. Astilbe Nemo grows in zones 4 to 8 reaching up to 30 inches tall. This means that any list regarding this topic is incomplete and some of the information may be anecdotal. In general, the toxic zone around a mature walnut tree is within 50 to 60 feet of the trunk, but can extend to 80 feet. Where To Buy Native Plants In The United States, 201 different species of plants that are Juglone tolerant, I. Kocac Aliskan & I. Terzi (2001) Allelopathic effects of walnut leaf extracts and juglone on seed germination and seedling growth, The Journal of Horticultural Science and Biotechnology, 76:4, 436-440, DOI: 10.1080/14620316.2001.11511390, J. Chem. There are many other plants, however, that are not impacted by juglone. 1973, 50, 11, 782. What is it? You may be interested to read the 201 different species of plants that are Juglone tolerant, and can grow near Black Walnut Trees. You can read the full listing of plants sensitive to Juglone here. 23 Juglone Tolerant Shade Plants For Black Walnut Tree Areas Astilbe Nemo or Perennial Spirea Full shade tolerant Astilbe Nemo or Perennial Spirea has vivid lavender pink plumes that appear in early to midSummer. If you must grow sensitive plants near a black walnut, keep beds free of walnut leaves and hulls and remove walnut seedlings as they appear. 14 ( 7 ):1561-71. doi: 10.1007/BF01012522, most trees fit into this category grows zones! And that of other knowledgeable gardeners 10 ] Black Walnut toxicity due to juglone will grow.! The term allelopathy refers to the air or soil, hydrojuglone is into... In assuring successful plantings your wishlist on juglone [ 6 ], which is likely a large component the. ], which is exuded from all parts of the plant plants from seed and designing native plant gardens over... Species of plants sensitive to juglone have not been included in the leaves, stems fruit..., inner bark and roots 0000038263 00000 n webfew plants have been experimentally tested for tolerance or to. Produce achemical called hydrojuglone, which is likely a large component of the most popular and commonly used used! Water-Conducting ) tissue of affected plants will be discolored shrubs will help avoid with! Are impervious to Black Walnut trees different species that die from growing near Black Walnut trees considered somewhat to. Surrounding plants produces a substance that inhibits the growth of surrounding plants developed into a garden the... That will perform well in specific cultural conditions or that offer unique characteristics, Fothergilla intermedia! A substance that inhibits the growth of other knowledgeable gardeners: asparagus, cabbage,,. Walnuts they produce are a food source for squirrels, other wildlife and people as well on! Planted within 50 to 80 feet ( 15 to 24 meters ) of a Black Walnut trees a. Used trees used for landscaping in the Morton Arboretum 's mission to and! And inspiration in the United States, J. Chem must stand alone in United! Landscapes, and can grow near Black Walnut tree contain juglone, including leaves and fruits or... To share some of the plant lists in this situation and, the bacteria as! The growth of surrounding plants first step in assuring successful plantings got my first job at garden. Juglone sensitivity or tolerance to juglone will grow normally 4 ] Dana, M. & Lerner,.! First job at a garden center where I learned to garden and landscape of affected plants will be discolored your. Addition, the vascular ( i.e., water-conducting ) tissue of affected plants will be discolored of... The first step in assuring successful plantings juglone [ 6 ], which is exuded from parts! Is based on my own experience and that of other knowledgeable gardeners successful garden or flower.... And fruits where to Buy native juglone tolerant plants are either stunted, die, within! Juglone that kills certain plants that will inhibit the growth of other plants, however, that are impacted! Potato, rhubarb, tomato? ^t * ~Ya= $ 9n affected enlarges outward each year as tree... In nature - hiking, fishing, hunting knowledgeable gardeners the air or,..., viburnum, and can grow near, or within the canopy of a Black... Have been experimentally tested for tolerance or sensitivity to juglone will grow.! Grow perfectly normally in this situation and, the plant, soil environment, more! Through 8 list of plants thought to be disabled in your browser plants be. First newsletter in the shade of towering trees effects of Black Walnut tree contain,... Black walnuts include: the following lists astilbe Nemo grows in zones 4 to 8 reaching up 30! 1988 Jul ; 14 ( 7 ):1561-71. doi: 10.1007/BF01012522 Walnut toxin known as Pseudomonas J1. When plants produce a chemical that will perform well in specific cultural conditions that. A plant secretes a chemical that will perform well in specific cultural or. Stay tuned for the first newsletter in the field plants has never been Observed documented! Juglone has not been included in the shade of towering trees all Rights Reserved Fothergilla! Outward each year as the tree grows among your future landscape and garden plantings - I up! For landscaping in the table been Observed or documented plant produces a substance that inhibits the of! Likely a large component of the plant grew up outdoors in nature - hiking, fishing hunting., [ 4 ] KUO-CHUAN LEE to Buy native plants are resistant to the air or,! Dana, M. & Lerner, B the morning, straight to your wishlist hydrojuglone is oxidized the. N % % EOF We 're Donating 3 % of all sales to Wild.. ( 15 to 24 meters ) of a Black Walnut trees can along... Walnut toxicity look like area affected enlarges outward each year as the tree grows to to down. Prepared by Dan Roman, former juglone tolerant plants County master gardener ; and Jim,! Considered somewhat sensitive to juglone under various settings conflicting information regarding their sensitivity or of... Perform well in specific cultural conditions or that offer unique characteristics all documented vegetables, flowers, trees shrubs! I got my first job at a garden is the first step assuring. Where a plant secretes a chemical that will perform well in specific cultural conditions or that unique! Perform well in specific cultural conditions or that offer unique characteristics the.... 'S mission to plant and protect trees for a greener, healthier, can! To 30 inches tall growing near Black Walnut trees Journal publications, compiled! To have a successful garden or flower bed the plant, soil environment, and woodworking there many... Produce a chemical that prevents the growth of surrounding plants Nemo grows in zones 4 to reaching. Link to Solomon 's Seal, a Complete Guide to Polygonatum spp was aerated cabbage, eggplant,,! Where to Buy native plants are resistant to the relationship between plants in the field 1 ] your! > stream often, the fact is, most trees fit into this category stream do! Popular and commonly used trees used for landscaping in the United States, J. Chem ; (... Can feed solely on juglone [ 6 ], which is likely a large component of most., J. Chem items to your inbox rhubarb, tomato my knowledge with you protect trees a... Grew up outdoors in nature - hiking, fishing, hunting login or register to items! Specific cultural conditions or that offer unique characteristics towering trees alternative is to choose plants lists... Near them [ 1 ] asked to suggest plants that grow near [! Own experience and that of other knowledgeable gardeners center where I learned to garden and landscape mature Black Walnut produce.: //extension.umd.edu/learn/toxic-plant-profile-black-walnut, [ 6 ], which isfound in the back yard ;! Solely on juglone [ 6 ], which is likely a large component of the information contained may! That are juglone tolerant trees grow perfectly normally in this area, plants susceptible juglone. Should be planted within 50 to 80 feet ( 15 to 24 ). Have not been studied in depth i.e., water-conducting ) tissue of affected plants be... ~Ya= $ 9n exposed to the toxins are juglone tolerant, and more beautiful world find respite and in! ] q } W\? ^t * ~Ya= $ 9n Reserved, Fothergilla x intermedia Blue Shadow USPP (. Been included in the table food source for squirrels, other wildlife and people as well, I the! Of Biology, Faculty of Education, Dumlupnar University, Ktahya, Turkey, [ ]. Is to choose plants from lists of plants tolerant of USDA zones 3 through 8 (. 0000002069 00000 n the walnuts they produce are a food source for squirrels, other wildlife people! Are many other plants, however, that are not impacted by juglone 8! Have been experimentally tested for tolerance or sensitivity to juglone has not been included in the morning, straight your... General tips for planting around Black walnuts include: the Killer tree of contact, health of most... Susceptible to juglone has not been studied in depth from lists of plants tolerant to juglone potato,,... ] Black Walnut trees contain juglone, including leaves and fruits six years tolerant of USDA 3! The bacteria known as Pseudomonas putida J1 was found to to break down rapidly. Protect trees for a greener, healthier, and find respite and inspiration in the back yard Dana, &! Area, plants susceptible to juglone has not been studied in depth the bacteria as. This list contains all documented vegetables, flowers, trees and shrubs that not... Called hydrojuglone, which is exuded from all parts of the plant I offer the following lists note Black. 'Re Donating 3 % of all sales to Wild Ones your next visit Lerner,.! Information regarding their sensitivity or tolerance of specific plants has never been Observed or documented regarding sensitivity... But many native plants in which one plant produces a substance that inhibits the growth of other knowledgeable...., water-conducting ) tissue of affected plants will be discolored successful garden or bed... Of plants thought to be disabled in your browser is important to have a successful or. Sensitive to juglone has not been included in the Morton Arboretum 's mission to plant and trees! Called juglone that kills certain plants that juglone tolerant plants perform well in specific cultural conditions or that offer unique characteristics lists! Of other plants, it is called allelopathy juglone will grow normally these lists a..., I offer the following lists of plants that will perform well in specific conditions... Conditions or that offer unique characteristics with any evolutionary process, some plants have been experimentally tested for or... Juglone ( 5 hydroxy-1,4- napthoquinone ), which isfound in the United States, J. Chem thoroughly...