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Thorny branchlets. The upright, rounded growth and short, irregular The new foliage emerges tinged with purple and matures to a bronze-green color. It also has mildly scented yellow flowers that bloom beginning from spring to summer. Though the flowers are beautiful, some also have bristles and thorns to be wary of. Locust trees have pods with pulp inside. The native species blooms in mid-late spring and the flowers are white and fragrant. JavaScript seems to be disabled in your browser. You can see these thorns along the trees lower branches and their trunk. In any case free trees free trees, want more of the purple robe locusts! They are usually about 2-4 inches long, flat, straight or slightly curved, and typically contain 3-10 seeds per pod. Use Current Location. The roots and seeds of the purple robe tree spread so aggressively that it is considered invasive. Upright, spreading shrub with slender thorns, narrow silvery leaves, orange fruit on females persists into winter: Holodiscus dumosus Rock spirea: 4 x 4. One can choose to cultivate it as a tree or a shrub. It looks elegant as it features arching leaves that radiate in clumps starting from a central point. Honey locust trees grow to between 66 and 100 ft. (20 30 m) tall. Purple Robe Black Locust 'Purple Robe' locust is a tremendous medium sized, suckering, deciduous shade tree that typically grows tall with an oval-upright habit. Like many types of honey locust trees, the bark is gray-brown. Wait until late spring, when the flowers are done blooming, before making any cuts. The spiky trunk is one reason why the tree is also called the thorny locust. These attractive blooms attract honey bees who are looking for nectar. Honey bees love it, as do many native pollen bees. Due to winter weather we have put a hold on shipping to the areas shown below in grey. Compared to honey locust trees, black locust tree leaves are a darker green color. Thornless honeylocust is a widely-used shade tree that grows in a round or slightly oval shape. This tree also shows tiny clusters of beautiful florets in greenish-white that tend to bloom during late spring to early summer. Being a member of the Robinia genus, there is a small oval leaflet at the tip of each leaf. Leaves are between 4 and 6 (10 15 cm) long and are fern-like similar to all trees in the Robinia and Gleditsia genera. Both of them are native to North America. This cultivar has yellow foliage and grows 40 feet high by 25 feet wide. Michael Dirr (p. 1014, 2009) calls it an "alley cat" type tree which can survive under the toughest conditions. It is also a great shade tree. The tree leaves are bipinnately compound meaning that smaller leaf branches grow off the main leaf stem. It can tolerate various soil pH levels and features yellow-green flowers and chewy and sweet seeds. We're here to keep you informed in all things related to plants. The Purple Robe locust trees leaves are metallic red when immature, and they gradually turn a deep green or bluish-green color. It is the main reason why you can see this tree being planted in those places that need solid and robust production of honey. Join in The Morton Arboretum's mission to plant and protect trees for a greener, healthier, and more beautiful world. The wood is weak and brittle making it subject to storm damage. You can also control black and honey locusts by cutting back these trees each growing season. Purple robe trees are great for planting in front yards . Please note that some items include an additional handling surcharge, these will be noted on the item's product page. chorus. This is also the reason why the Shademaster honey locust tree is classified as an easy-to-maintain locust. Overall, the black locust is also a fantastic hardwood tree capable of growing thick and tall. A fast-growing, hard-wooded, easy-care, extremely ornamental native tree? Promptly remove suckers as they appear unless naturalization is desired. 'Sunburst' honey locust has yellow foliage. Almost any soil condition will do, including clay, sand or loam that is acidic to alkaline, with a preference for a pH ranging from about 6.8 to 7.7 and an organically rich loam. It thrives at a neutral level, too. COPYRIGHT 2020, WATTERS GARDEN CENTER. Cut a few of these flowers and enjoy them in an indoor vase, as it is an impressive display. It is unique in that it grows upright, which is why you can commonly find it in streets and parks. Considered among natures jewels and treasures, the locust tree continues to leave a good impression with its different types and varieties. In several cases, you have to perform the treatment method again, regardless of what it is, to keep the tree under control. In its blooming stage, bright green with purple tinge foliage will emerge. Each cluster can be up to 8 inches long. Here are three of our favorite wild edible flowers of spring, all of which can be found in huge quantities throughout most of the United States: 1. Purple Robe' locust: 35 x 25. Blooms are often followed by showy, 4 purple edible fruit . Black locust timber (left) and bark (right). One of the heaviest and hardest woods in North America, black locusts are actually in the pea/bean . The Purple Robe has beautiful aesthetics because of its purple flowers. Leaves are alternate and pinnately compound. This thorny tree also works well to control erosion. options as you create a beautiful landscape with help from Nature Hills. It is advertised as thornless, but plants with thorns are found in commerce. The perfect mountain perennial with huge fiery flowers on a compact plant. Locust tree identification during the spring is possible by checking out the presence of pendant clusters of sweet and fragrant pea-shaped flowers often in the shades of pink and white. 'Purple Robe' Black Locust1 Edward F. Gilman and Dennis G. Watson2 INTRODUCTION This cultivar of Black Locust probably grows to about 40 feet tall with a spread of 20 to 35 feet (Fig. Black locust is resistant to black walnut toxicity. One more distinctive feature of the black locusts is their oblong crown, which you can see atop its straight trunk. It is short-lived and prone to borer injury. You can use these pulps in making traditional cuisines and recipes and in preparing medicines. The species of locust trees are divided into two genera: Robinia and Gleditsia. Each spring, the leaves emerge reddish bronze, before maturing to dark blue-green. Thorny Bushes and Shrubs Look to some of these thorny bushes as potential barrier plantings, as well as plantings for their beauty and fragrance. If you are planning to grow honey locust trees, take note of the following: You also have to consider its size upon reaching maturity before growing it, so you can provide it with the right amount of space for growth. There are no sharp spine or pods to clear up in the fall. It is hard wooded and tolerates storms well. Follow the Watters planting guidelines for the best results. Expect the bristly locust trees to thrive well in moist and loamy soil with high salt levels. Fixes nitrogen. Establish it the first year with careful watering. You can pick them but be extra careful if the tree has thorns. Trees send out underground root suckers that not only become a maintenance problem but also can disrupt nearby gardening areas. The tree also features dark red to black and leathery seed pods that are around two to four inches in length. Even in poor, infertile soils, the plants seem to grow. It has leaves that begin to look light green once the spring season comes then slowly become darker. You can cultivate it to craft furniture in carpentry, which makes it different from the black locust. The bristly locust tree is also otherwise known as the moss locust and the rose acacia. The black locust tree is also very appealing that everyone will notice its presence in a park or garden. Purple Robe Locust trees develop incredible, long clusters of purple colored flowers in mid- to late spring that look very much like Wisteria flowers. Locust trees grow to between 66 and 98 ft. (20 30 m). Other insect problems include caterpillars, weevils, scale and whiteflies. They also have pods that tend to bend and curl a bit. Choose a thornless variety of honey locust trees if you want to grow an elegant, tall honey locust in your garden. At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Fragrant wisteria-like violet purple flowers in pendant racemes (to 8 long) bloom in mid to late spring. She proliferates up arbors, pergolas, fences, and stunning as a ground cover to retain hills. Violet purple spring flowers make this an interesting tree for the landscape. It is also one of the honey locust varieties capable of growing really rapidly. The 6- to 14-inch-long, dull, blue/green leaves, made up of multiple leaflets, are some . Since beginning her career as a professional journalist in 2007, Nathalie Alonso has covered a myriad of topics, including arts, culture and travel, for newspapers and magazines in New York City. It will then turn into bright yellow once the fall comes. The excellent shade from this locust tree comes from the exceptionally wide canopy coverage. You can differentiate between these two major types of locust trees by checking out the thorns at the branches and barks. The tree grows to 45 ft. (13 m) and has a canopy spread of 35 ft. (10 m). Yes. Bees produce a delicious honey from the flowers. It has a rapid growth rate and lives up to an average age of 100 years. Dreams blossom in time. Nature Hills sells a large variety of plants with several options available. Locust borer is a serious pest of black locust. There are several cultivars of thornless honey locust trees, such as Imperial (Impcole), Skyline (Skycole), Sunburst (suncole), Moraine, Northern Acclaim (Harve), Perfection (Wandell) and Street Keeper (Draves). Similar to other types of locust trees, the imperial honey locust has beautiful fern-like foliage that turns to sunny yellow in the fall. The Arboretum has the expertise and advice to help you beautify your home landscape, improve your community, and advocate for trees. Each cluster may be up to eight inches long and covers the tree profusely. This makes it a perfect choice if you intend to make a restful and relaxing part of your garden with a nice shade. Soil: The honey locust tree is a hardy tree and can grow well in different types of soil. This is also a drought-tolerant tree capable of blooming fragrant white flowers. The locust tree is the quintessential shade tree known for its attractive form, great-looking fall foliage, and highly impressive leaves. It has to be in a soil that drains well. White/May - Jun. The honey locust (Robinia pseudoacacia), sometimes called the black locust or the purple robe locust, features purple-tinted leaves and deep purple flowers. Don't wait for your chance to own this gorgeous tree, order now! Rather than growing to 80 or 100 ft. (24 30 m), the sunburst honey locust only reaches 40 ft. (12 m) in height. Thornless locust trees have beautiful foliage, bright flowers, and attract honey bees. 'Purple Robe' Locust (Robinia pseudoacacia 'Purple Robe') This fast-growing, mid-sized ornamental flowering tree can survive the most difficult situations in different areas. Seed pods, or legumes, mature in early fall. This tree is distinguishable because it does not have thorns plus it grows really fast. As he stood alone forsaken on that day. Ecological threat: Invades forests, upland prairies and savannas, pastures, old fields and roadsides. Among these locust varieties are the following: If you are in search of a thornless locust tree, the Imperial honey locust is ideal for you. It has a trunk and branches with stout spines that are usually branched, though not as big as the honey locusts spines. Some also use the pulps of the seed pod to ferment beer. The only one that has a toxic substance known as toxalbumin is black lotus. The trunk is long and straight with an interesting branching pattern. 1). We write how-to guides and tips for houseplants. . Seedlings and root sprouts have long thorns and grow rapidly. The bark, seed pods, branches, and leaves are considered to be toxic. As Jesus was bent over with a lacerated body they hailed him King of the Jews, and the soldiers put . The locust tree Suncole cultivar is a popular deciduous tree because of its feathery foliage that provides dappled shade in the hot sun. The purple robe locust tree is also very thorny and has relatively weaker wood than the others. Leaves and stem. My Purple Plum Tree Looks Black Like Fungus: What Is This. New foliage is bronzy-red. The Purple Robe Locust likes full sun or dappled shade and will take most any soil, drought or lawn watering. It derived its name from the fact that it indeed has no thorns at the twigs and barks, making it distinguishable from other honey locust trees. Make a great street tree, handling the tough conditions with ease. Expect it to grow to around 30 to 70 feet tall. The Purple Robe Locust Tree grows up to 40 feet in height and produces bright flowers. The large compound leaves have smaller blue-green leaflets, and youll love the fine-textured look of the tree in summer. The fruits are flat brown legumes (pods) and are 4 inches long. Trees of the Purple Robe Locust develop long clusters of violet flowers similar to those of Wisteria in the spring. This species grows in a wide range of conditions, but avoid growing it in wet sites. Black locust trees bloom in late spring with intensely fragrant white flowers. The black locust is kind of invasive and features twenty-one leaflets less than two inches long. The bark is deeply furrowed and is brown and gray. The black locust tree is also called False Acacia, Fragrant White Locust, and Common Robinia. It is native to states such as Pennsylvania, Alabama, Georgia, Missouri, and southern Ohio. Twisty Baby black locust (Robinia pseudoacacia 'Lace Lady'): At 20 feet high by 20 feet wide, this tree is smaller in size and has contorted limbs. Research has shown increases in nitrogen in barley grain crops interplanted with locust, and black walnuts interplanted with locust as "nurse" trees were shown to rapidly increase their growth. Weve married the beauty of long stem roses with the Easy-care of shrub roses for landscape color like no other plant in the backyard. There are varieties of the tall honey locust with larger branches and trunks capable of bearing branched and stout thorns that can reach up to 20-inch in length. We have people waiting for their chance to own the Purple Robe Locust tree. Best performance is in moist, organically rich loams. The presence of these thorns makes it kind of impossible to climb the tree but they also make this locust tree variety quirky yet attractive. The fern-like leaves and widely spaced branches give enough shade without completely blocking out sunlight. Perfect for low maintenance gardening with virtually no pruning ever. It has with deeply furrowed bark with flat-topped ridges. It is best pruned in the dormant season as this tree will bleed when pruned in spring. The purple robe tree gets its name from its purplish pink flowers. Get Pricing and Availability . An impressive show and worthy of cutting a few flowers and bringing them indoors for enjoyment. Because the inermis cultivars have no sharp spikes on the bark, there is no danger of injuring yourself. It grows in an upright, irregular oval shape. They are growing beautifully without any care in poor soils, with open exposure, and where little additional water would ever get to them? Flowers white, fragrant, .5-.8 inches (1.3-2cm) long, in dense, hanging clusters 4-8 inches (10.2-20.3cm) long. Extremely fragrant and only found locally at Watters. I have not seen the suckering from this tree that Locusts in other areas can have. Matthew says (Matthew 27:28), "They put on him a scarlet robe . You will also notice the leaf gaps in this variety that provide the plants in any lawn dappled light. Wait until late spring, when the flowers are done blooming, before making any cuts. To obtain a more accurate shipment time-frame, simply enter your zip code in the Find Your Growing Zone box to the right. We ALWAYS sell out of this incredible native tree and this year will be no exception. But once established, tough Purple Robe Locust trees are also super hardy and drought tolerant with a brisk growth rate of 2 or 3 feet of growth each year. Overall, it is one of the nicest accent and shade trees with the ability to resist deer and various diseases. Similar to the black locust tree, this genus is native to states such as Pennsylvania, Iowa, Texas, and Georgia. 3. The ability of this tree to adapt well to various conditions and suit different needs and gardens is also one reason why it is one of the top choices of those who intend to grow their own trees. One of the reasons this locust tree variety is popular is that it grows in several unfavorable conditions. These are sweet-tasting peas that animals enjoy eating. 'Purple Robe' - This compact, rounded cultivar, one of the most attractive forms, should not exceed 30 to 40 feet in height. You can choose to use it for small wooded or shady areas or as a focal point on your large lawn. Cut new growths and stems and be patient as you may have to do them several times throughout the year. Just like the black locust, the species of honey locust grows in many different environments and thrives in full sun. Whichever variety of locust tree is in your yard, you will remove the base shoots in the same way. Be sure to place your order as soon as you see this gorgeous tree in stock. If you encounter issues loading this site, please refresh the page by using Ctrl + F5 if on Windows or Cmd + Shift + R if on Mac. Also, observe if there are forked, straight, or sharp spines, which also indicate locusts. These trees grow fast, up to 25' high by 20' wide. The purple robe locust, scientific name Robinia pseudoacacia, is a species of flowering plant in the Fabaceae family. The purple robe locust is hardy in U.S. Department of Agriculture zones 4 to 8. It is also sometimes considered to be somewhat weedy. Full Sun or Shade for a Crimson Queen Maple, Missouri Botanical Garden: Robinia "Purple Robe", The University of Utah: Facilities - Purple Robe Locust, Utah State University Extension: Integrated Pest Management - Locust Borer, How to grow your own herb garden in any indoor or outdoor space. Feed twice monthly with Watters Flower Power for a riotous bloom all season long. Combine that with the decorative shape of its branches, trunk, and foliage, and this tree will surely add a more aesthetic appeal to your garden. RMG334R5 - Robinia pseudoacadia 'Purple Robe' Purple Robe Locust RM FGARG8 - nierembergia hippomanica purple robe Cupflower flower flowers flowering Caerulea var violacea groundcover RM Floral RF 2J07AG9 - Passion And Crucifixion Of Jesus - Crown Of Thorns And Bloody Nails And Purple Robe On Ground With Sunlight And Selective Focus Lets look at various kinds of locust trees, starting with the two most popular speciesthe black locust tree and the honey locust tree. Purple robe locust tree. The Purple Robe Locust, robinia pseudoacacia, is a stunning ornamental that is known for developing, in the spring, swathes of gorgeous pink-purple flowers that resemble wisteria. Anyone interested in growing trees can make it part of their plant or tree collection, allowing them to witness a spreading canopy capable of providing a nice spot with shade. .yum! It is noted for its attractive compound leaves and pendant racemes of violet purple pea-like flowers. Each leaf is divided into anywhere from nine to 17 leaflets that are 1 or 2 inches long and arranged in pairs. Contact Us The leaves are odd pinately compound with up to 23 lance . Popular sizes of select trees are 1 foot, 2 feet, 3 feet, etc. (1). As the name suggests, it refers to the leaf of a locust tree, which is often pinnately shaped while being feather-like. Black locust trees are in the Robinia genus, while honey locust trees are in the Gleditsia genus. The scourging is performed with a whip called the "flagrum" and had pieces of sharp instruments embedded into the cord which was designed to remove flesh quickly. . It is also effective in terms of erosion control. Because of its thick and large branches, you can also easily distinguish the New Mexico locust tree. Several of its varieties come with long, fierce, and sharp thorns that tend to grow in pairs. The beautiful Purple Robe Black Locust tree. Loam, wet . The tree leaves have dark-green or light green color, depending on the species. I have two purple robe and one golden locust that we planted when we moved in ten years ago. Another distinguishing feature of the black locust is a pair of sharp and short spines where you can see its leaf being connected to the stem. However, all of them are aesthetically pleasing and boast of their nice scents. The honey locust tree is a hardy, fast-growing tree, similar to the black locust tree. 5. The attractive features of the Purple Robe locust tree are its young red leaves that turn to blue-green and then turn yellow in fall. The Purple Robes will adapt to our hot, dry New Mexican areas and will tolerate our alkaline soils. Scientific names: Robinia pseudo-acacia. How to Plant a Texas Ash Tree in and How Much Soil? When you sign up for our FREE newsletter! The Purple Robe Locust (robinia pseudoacacia) is a beautiful ornamental tree, famous for blooming stunning pink and purple shades flowers in the spring. This will depend on the kind of soil it will grow and the specific amount of sun it would most likely receive. When they first emerge in the spring, the leaves of the purple robe trees have a reddish-purple tinge. Bees and beneficial insects love the flowers. The imperial honey locust tree is a thornless species of deciduous tree that grows up to 40 ft. (12 m). These beautifully fragrant clusters cover the tree profusely that grows up to eight inches long each! Previous Post: Farewell to Roses. Super hardy and drought tough with a brisk growth rate of 2 feet in one year. 1. The growth of this tree is also mainly upright and features leaf gaps capable of casting sufficient lights so other lawn plants can grow. The large compound leaves have smaller blue-green leaflets, and you'll love the fine-textured look of the tree in summer. Leaves emerge an interesting bronze-red in spring, but eventually turn an uneventful yellow in fall. This pea family member (Fabaceae) tolerates poor . Dark green leaves in the summer turn in to attractive yellow foliage in fall. It grows fast as a shade tree and follows an arching habit, allowing it to showcase a shade of around 30 to 35 feet and a height of around 30 to 50 feet. Similar to the black honey locust tree, the bark on the New Mexico cultivar is light gray-brown with shallow furrows. This thornless honey locust tree is also famous for being really adaptive and durable. *If you have found your zone already, it will be highlighted in the table below. Purple Robe Locust is a tremendous shade tree that develops long clusters of purple-colored flowers in May that resemble Wisteria flowers. This variety grows best in USDA hardiness zones 7-9, and in colder climates. Middle-aged 'Purple Robe' Black Locust. Don't wait for your chance to own this gorgeous tree, order now! The purple robe was to symbolize royalty, and they mocked him as King of the Jews. Expect them to look green at first then become red and lastly, brown. The thorns of a Black Locust Tree are a product of evolution, and act as a deterrent to mammals browsing the foliage. Its wide spread, lack of thorns, and pod-less characteristics mean it is not a messy tree. It also has fragrant white flowers capable of attracting insects, including bees. 1. This article explains more about the amazing locust trees and how to deal with their thorns. Our horticultural team has put together recommendations on how to best use this tree in your landscape: 1. The feather-like leaves are pinnately compound that are bright green throughout spring and summer before turning to golden yellow in the fall. Video of the Day Step 2 Remove all locust tree shoots as they appear. Black locust trees grow to between 40 and 100 ft. (12 30 m) with exceptional varieties reaching heights of 171 ft. (52 m). This small, tough native tree is prized for its fragrant purple panicles of flowers that appear from mid to late spring. Soil: Most soil types, including alkaline, acidic, and neutral It can thrive in salty soil, too, and can tolerate light drought and a bit of flooding. The vast spread of the trees foliage, small leaves, and widely-spaced branches make this an excellent shade tree. New growth is bronzy red. It is susceptible to locust borer (often fatal) and locust leaf miner (browns foliage). Flowers are followed by smooth, flat, purple-brown seed pods (to 4 long). Purple Robe Locust Starting at $29.95 Ruby Lace Locust Locust Trees Locust trees are highly versatile and thrive throughout the entire United States. Thornless honeylocust trees are tolerant to various stressors like pollution, salt, and drought. It can handle many soil types and needs little water. Many say that the only locust trees that contain the toxic and poisonous substance known as toxalbumin are those that belong to the black locusts. It was magnificent. This purple flowering variety, Indica Crape Myrtle, still loves heat and humidity. If you want a thornless variety of skyline locust tree, look for the Gleditsia triacanthos f. inermis Skycole cultivar. Sharp spines may be present, especially on sucker growth. These beautifully fragrant clusters cover the tree profusely that grows up to eight inches long each! Pictures, descriptions, and their scientific names will help identify each species of these deciduous trees. . Possible disease problems include canker, powdery mildew, leaf spots, wood rots and verticillium wilt. Purple Robe Locust botanical name is Robinia pseudoacacia, an improvement of the native Black Locust tree. You can still order now and we will ship the plant to you during an appropriate time for your zone. The name honey comes from the fact that honey locust trees have pods with sweet taste. It can also spread to around 20 to 35 feet. They prefer full sun and can grow to 30-70 feet tall with a 30-70 foot spread. Other names for the New Mexico Locust tree include Desert Locust, Pink Locust, or Rose Locust tree. Plant Purple Robe Locust in an open, sunny space where it will get plenty of light and air circulation. It is an impressive display, and you will definitely want to cut a few and bring them indoors to enjoy in a cut flower arrangement. The sweet-smelling, fragrant flowers are light purple and shades of pink. Black locust is a tough tree that will survive very poor conditions. It features deep green ferny leaves during the spring that become golden yellow once the fall comes. Chokecherry Tree: Leaves, Chokecherries, Flowers (With Pictures) Identification, Weeping Cherry Trees: Types and Care (Including Dwarf Weeping Cherry Trees), Flowering Dogwood Trees and Shrubs: Types, Leaves, Bark - Identification (With Pictures), The Best Desert Trees with Pictures and Names, Types of Locust Trees with Identification Guide and Pictures, Small or Dwarf Weeping Trees for Landscaping, Dwarf Fruit Trees to Grow Indoors or Outdoors. This fast-growing native tree can form colonies and has brittle wood. His raiment was a scarlet purple robe. Black locust is native to the eastern and the southern parts of the United States. These showy flowers grow on reddish-purple branches that have spikes at their base. Black Locust (Robinia pseudoacacia) Flowers. Robinia is a genus of between maybe 6 to 30 species (many are unresolved) of trees and shrubs from North America. Purple-robe locust trees need full sun, although they will tolerate light shade. Depending on the species, the locust leaf could be light green. How long should this tree live ? You will also notice the black locust blooming prolifically even if some of its varieties dont bloom annually. Most varieties of black locust tree come with thorns while the varieties that fall under honey locust trees are often thornless. The bark on bristly locust trees is gray and smooth. Have you ever noticed a group of white-flowering trees blooming in mid-spring along pasturelands and fence lines? taller than the height minimums. One of the fastest-growing evergreen vines for mountain gardens. Model #NURSERY. Two of the most famous types are the honey locust trees (Gleditsia triacanthos) and the black locust trees (Robinia pseudoacacia). We use FedEx, UPS, or USPS at our discretion. The two are deciduous trees that also work well in the landscape. Note, though, that the purple robe locust tree has this invasive nature, which is why it is not ideal for household lawns. However, purple locusts will not tolerate "wet feet" and therefore require good drainage. It is a good choice if you are in search of a thornless honey locust tree variety. Shipping and handling charges are calculated based on the tables below. This is a very distinctive and unique variety that the sweet scent of its flowers will definitely invite pollinators and humans to your garden. It also has thin yet elegant-looking branches and a gray trunk with huge purple thorns covering it. They eventually mature to a dark green and turn yellow in the fall. 3. The honey locust (Gleditsia triacanthos), also referred to as the thorny locust or . For the honey locust, you can identify them as many consider them tall locust species. 2021 Plants Spark Joy - Your daily dose of all things plants. Locust trees refer to rapidly growing flowering trees that belong to the pea family and a group of flowering plants known as Fabaceae. There is a high chance for its trunk to become really large. I fell in love last Thursday. Choose the thornless cultivars if you love this locust tree because of its flowers, not the spikes and thorns. Similar to other cultivated honey locust trees, the Purple Robe grows to between 30 and 40 ft. (9 12 m) tall and has a spread of up to 30 ft. (9 m) wide.