Robinia pseudoacacia, commonly called black locust, is medium sized, suckering, deciduous tree that typically grows to 30-50’ (less frequently to 80’) tall. Tolerates some light shade, but avoid shady locations. Species trees are sometimes considered to be somewhat weedy. Numerous cultivars have been bred in Europe, including some elegant leaf and flower colour forms, and a number of hybrids exist. The compound leaves consist of 9 to 19 elliptical, leaf segments that are 2 – 4.5 cm in size. This is a larval host plant for several butterflies. If ingested, it may cause death in humans and livestock and pets. It is generally a crooked tree and often has a tendency to fork. It is a very upright tree with a straight trunk and narrow crown that grows scraggly with age. Exceptionally, it may grow up to 52 metres (171 ft) tall and 1.6 metres (5.2 ft) diameter in very old trees. Promptly remove suckers as they appear unless naturalization is desired. Trees send out long underground root suckers that not only become a maintenance problem but also can disrupt nearby gardening areas. Flower and Leaves (Warren County, NC)-Spring, Flower close-up (Warren County, NC)-Spring, Fencing, mine timbers, and landscaping ties, found in all 48 states of the contiguous US. The dark blue-green compound leaves with a contrasting lighter underside give this tree a beautiful appearance in the wind and contribute to its grace. Full sun (6 or more hours of direct sunlight a day), Partial Shade (Direct sunlight only part of the day, 2-6 hours), 3b, 3a, 4a, 4b, 5b, 5a, 6b, 6a, 7b, 7a, 8b, 8a. Heat and drought tolerant. At its best, it will grow as a broadly columnar single trunk tree with a narrow oblong crown. Avoid pruning in spring when it tends to bleed.Species trees spread by self-seeding and root suckers. They grow upright in forests but develop an open growth form in more open areas. 7 BENEFITS of Robinia pseudoacacia ‘Frisia’. The tree produces a 2- to 4-inch flattened legume which contains 4 to 8 red-brown seeds. This tree is not generally recommended for prime landscape areas because of its suckering habit and its susceptibility to borers. Mature Height: 40-80 ft. Its trunk can grow to 3-4 feet in diameter. NC State University and N.C. A&T State University work in tandem, along with federal, state and local governments, to Some of its leaves yellow and fall off during times of drought. https://www.fs.fed.us/database/feis/plants/tree/robpse/all.html It is also a legume, fixes its own nitrogen and is moderately salt tolerant. I first came across this specimen on a trip to London in late spring, close to two decades ago. Leaf C:P and N:P ratios were higher for Robinia pseudoacacia than for understory plants.. N:P ratios indicate a tight coupling between soil and plant. Black locust reaches a typical height of 40–100 feet (12–30 m) with a diameter of 2–4 feet (0.61–1.22 m). Black locust primarily invades disturbed habitats, degraded woods, thickets and old fields, where it crowds out native vegetation and forms single species stands. Robinia pseudoacacia, commonly called black locust, is medium sized, suckering, deciduous tree that typically grows to 30-50’ (less frequently to 80’) tall. Leaflets are oval, one inch long, with entire margins. It develops shoots from roots. Trees along the highways in the south can be I was taken aback by its delicate, lime colored leaves in contrast with all of the green plant material around the base of its trunk. They are pea-like and very fragrant. The leaves are alternate, pinnately compound with 7 to 21 leaflets. This is a good plant for difficult sites, transplants well, and tends to reseed. Pinnate dark blue-green leaves, with each leaf having up to 23 lance-shaped to ovate leaflets. In spring and early summer, fragrant, pea-like white flowers, borne in long (5 inch) hanging clusters mature. 2. Silver-Spotted Skipper (Epargyreus clarus) appears from May-September with three-four broods in the deep south, two broods in the east, and one brood in the north and west. Robinia pseudoacacia 'Frisia'. Robin, a phytotoxin; robitin, a glycoside; robinine, an alkaloid. However, if the roots are disturbed or damaged, vigorous suckering starts. Also bothered by carpenterworm, locust leaf miner, and scales. Soil / Climate: It is native to South Eastern United States. Robinia pseudoacacia 'Bessoniana' – Robinia pseudoacacia 'Bessoniana' A decorative selection with a straight trunk and a broad, oval crown later becoming broad ovoid. Robinia pseudoacacia is an invasive species! Compound (Pinnately , Bipinnately, Palmately). Leaf miner is a universal problem on the species. Top of page R. pseudoacacia is a medium-sized tree, generally 12-18 m tall and 30-76 cm in stem diameter, with an open, irregular crown. The flowers are followed by smooth, flat, purple-brown seed pods (to 4-5” long). Trees send out long underground root suckers that not only become a maintenance problem but also can disrupt nearby gardening areas. On better sites it may reach 30 m tall and 122 cm or more in diameter. fire in the landscape. Compact, pendulous clusters of creamy white, sometimes slightly pink, aromatic flowers appear in June. Robinia pseudoacacia‘Frisia’ -- ‘Frisia’ Black Locust Page 4 Pests Locust borer is a serious pest although borer-resistant clones are now being developed. It is in flower in June, and the seeds ripen from November to March. Robinia hispida × Robinia pseudoacacia → Robinia × margarettae Ashe is a very rare locust hyrid known from MA. Numerous cultivars have been bred in Europe, including some elegant leaf and flower colour forms, and a … It has pinnate dark blue-green leaves, with each leaf having up to 23 lance-shaped to ovate leaflets. Can sucker from its roots. Black Locust is a deciduous tree that may grow 50 to 70 feet tall. Fixes nitrogen. Robinia or black locust Robinia, Robinia pseudoacacia, does not produce suckers in all circumstances and some big, old specimens have never caused problems. Tolerates a wide range of soils including sandy or nearly barren ones. Other insect problems include caterpillars, weevils, scale and whiteflies. The shrubs to small trees (1–10 m tall) are hispid in the inflorescence and may be hispid on the petioles. Black Locust is easily transplanted and grown. 1. The yellow foliage lasts only for a short period in the spring in the south. The 6- to 14-inch-long, dull, yellow leaves, made up of multiple leaflets, are some of the last to appear in spring and often drop early in the autumn, just barely fading to a sickly yellow/green before dropping. Likes full sun and tolerant of most soils. Bees are attracted to the flowers. Best performance is in moist, organically rich loams. The bark is gray or light brown, thick, fibrous, heavily ridged, and furrowed. Robinia pseudoacacia afforestation improved soil and plant community characteristics.. The leaves are imparipinnate and the flowers are white. 15 cm) and 1 to 3 pairs of small side leaves. Good drought tolerance. Robinia pseudoacacia ‘Frisia’ problems. Robinia leafs out late and keeps its leaves long into the autumn. Although originally native to the Allegheny Mountains, it has escaped gardens and naturalized over time to cover much of the United States and southern Canada plus parts of Europe, Asia and South America. 'Frisia' leafs … Robinia pseudoacacia T. Sitzia, A. Cierjacks, D. de Rigo, G. Caudullo Robinia pseudoacacia L., commonly known as black locust, is a tree native to North America and is one of the most important and widespread broadleaved alien trees in Europe. The tree likes Sun to slight shade at the location and the soil should be sandy to strong loamy . Read our Commitment to Diversity | Read our Privacy Statement. Branches are usually armed with short paired spines (to 1.25” long). Latin: Robinia pseudoacacia. 2) Origin: native to North America Uses: reclamation plant; shade tree; no proven urban tolerance Availability: somewhat available, may have to go out Native Range: Eastern and central United States, Suggested Use: Flowering Tree, Naturalize, Tolerate: Deer, Drought, Clay Soil, Black Walnut, Air Pollution. form a strategic partnership called N.C. The Tree is a deciduous tree, it will be up to 25 m (82 ft) high. These display from July to November. It is a moderate grower with striking lime green foliage which intensifies into a vibrant, golden colour in autumn. It is considered to be a good selection for difficult areas where other trees will not grow well. Other common names: yellow locust. There are 3 flights in the north and 4 to 5 flights in the south (but it rarely uses this plant as a host in North Carolina). The species is hermaphrodite (has both male and female organs) and is pollinated by Bees. Where is this species invasive in the US. Cooperative Extension prohibits discrimination and harassment on the basis of race, color, national origin, age, sex (including pregnancy), disability, religion, sexual orientation, gender identity, and veteran status. The paired, stout thorns at each node are unlike any other tree in our area except for Zanthoxylum americanum, which has pointed leaflets and is likely to be recognized as a shrub. The wood from this native is naturally rot resistant and often used to make fence posts and rails. Robinia pseudoacacia. 1×2. Fragrant wisteria-like white flowers in pendant racemes (to 8” long) bloom in late spring. Native; Deciduous; Medium size tree growing up to 75-95′ in height and 25-30′ wide canopy In spring its ovate leaves are bluish green on top followed by chartreuse yellow foliage that gets more yellow and brighter right up to autumn. It also will grow in suckering thickets. Possible disease problems include canker, powdery mildew, leaf spots, wood rots and verticillium wilt. Clouded Sulphur (Colias philodice) larvae appear from May to October in the north and from March to November in the south. Leaves resemble sprigs of grapes; green above and paler below. Leaves turn uneventful yellow in fall. Flower: Perfect, showy and fragrant, white, 1 inch long and pea-like, borne in long (5 inches) hanging clusters, appear in mid to late spring. The Garden wouldn't be the Garden without our Members, Donors and Volunteers. Scientific name: Robinia pseudoacacia Pronunciation: roe-BIN-nee-uh soo-doe-uh-KAY-shuh Common name(s): Black Locust, Common Locust Family: Leguminosae USDA hardiness zones: 4 through 8 (Fig. However, in recent years, this particular cultivar, 'Frisia', has suffered from a damaging dieback problem, sometimes causing the ultimate loss of the tree. Although originally native to the Allegheny Mountains, it has escaped gardens and naturalized over time to cover much of the United States and southern Canada plus parts of Europe, Asia and South America. Black locust is generally considered to be a very easy-to-grow tree. The irregularly shaped leaves hang on a long leaf stem and consist of a strikingly large top leaf (to approx. Robinia pseudoacacia can be pruned and kept at shrub size by cutting them to the ground every 2-3 years. Leaf: Alternate, pinnately compound, with 7 to 19 leaflets, 8 to 14 inches long. The crown is significantly more closed in structure than that of the species. Grow in average, dry to medium, well-drained soils in full sun. Fragrant wisteria-like white flowers in pendant racemes (to 8” long) bloom from April to June. When designing a new garden, this can be a big plus. Fun Facts. "Purple Robe" black locust (Robinia pseudoacacia "Purple Robe") can grow in some of the most difficult conditions and on a variety of sites. It is a medium-sized, deciduous, fast-growing thorny tree with high suckering capacity. Zones: 3-9. Small branches of the Black locust fall easily during storms. black locust Fabaceae Robinia pseudoacacia L. symbol: ROPS. The buds and catkins are eaten by birds.  It provides an excellent leaf cover for birds in wetland sites.   Bees are attracted to its flowers. Robinia pseudoacacia ‘Frisia’: ‘Frisia’ Black Locust3 should be saved for the toughest sites. Depression, weakness, dilated pupils, vomiting, bloody diarrhea, weak pulse, coldness of arms and legs, paleness, and shock. Not for general use in urban areas due to borer problems unless located on … It is noted for its attractive compound leaves and pendant racemes of pea-like flowers. It is susceptible to locust borer (often fatal) and locust leaf miner (browns foliage). Leaves turn uneventful yellow in fall. Possible disease problems include canker, powdery mildew, leaf spots, wood rots and verticillium wilt.Species trees are sometimes considered to be somewhat weedy. ... Thorns can be found at the base of the leaf stalk. Robinia pseudoacacia, commonly known as the black locust, is a prickly tree within the subfamily Faboideae of the pea family called Fabaceae and is considered to be a legume with flattened pea pods several inches long. Robinia pseudoacacia can be pruned and kept at shrub size by cutting them to the ground every 2-3 years. The autumn colour is yellow. Deciduous tree, to 40 ft (12 m) high and a spread of 25 ft (8 m), oval with upright branches, young shoots have wine-red prickles (thorns). Invasive Species: Robinia pseudoacacia, Black Locust. Other insect problems include caterpillars, weevils, scale and whiteflies. The leaf of the Black locust is noted for its attractive alternate, compound leaves and pendant racemes of pea-like flowers. Seasons of Interest: Leaves: Bloom: Spring Fruit/Seed/Nut: Fall Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. Zarucco Duskywing (Erynnis zarucco) has three broods in the deep south from March-October, appearing as early as January in Florida. Robinia pseudoacacia is cultivated widely as an ornamental. It is a vigorous grower with a vertical trunk and a squat, irregular crown. It thrives in many difficult growing conditions. Black locust is a deciduous tree that, while native to parts of the United States, has spread to and become invasive in other parts of the country. Robinia pseudoacacia has alternate compound leaves with blunt entire leaflets. The Black Locust is botanically called Robinia pseudoacacia. Purple robe black locust (Robinia pseudoacacia 'Purple Robe'): Flowers are deep rosy-purple; new foliage emerges tinged with purple and matures to a bronze-green color. When Robinia 'Lace Lady' attracted my attention, at the Monrovia display garden in Oregon, its contorted branches and leaves were curling every which way.. Leaves similar to the species type but bright yellow in spring then greenish-yellow in summer. Fire Risk: This plant has a low flammability rating. Leaf: odd-pinnate, 20 - 30 cm, 9 - 19 leaf segments, 1.5 - 4.5 cm, green, feathered leaf Twisty Baby® black locust (Robinia pseudoacacia 'Lace Lady'): Smaller size tree (20 feet high by 20 feet wide) with contorted limbs. Black locust (Robinia pseudoacacia) is native to the U.S., but not to the Upper Midwest.It is currently spreading into states like Minnesota that are outside of its historical range. Golden Robinia. Fire Risk: This plant has a low flammability rating. About Purple Robe Trees. This means that when the black locust has been introduced to a new environment, it tends to compete with native species and take over in … Flowers are followed by smooth, flat, purple-brown seed pods (to 4-5” long). Leaves:       Bloom:   Spring    Fruit/Seed/Nut:  Fall. A mature Black Locust tree : Description. Description Robinia pseudoacacia 'Unifoliola' Closed, broad pyramidal tree 15 - 18 m high. Its branches are usually armed with short paired spines (to 1.25” long). The leaves have an orange-yellow colour when they emerge, turn greenish yellow in summer, and deep golden yellow in the autumn. It grows quickly and can reach heights between 40 and 100 feet. It’s an extremely fast growing tree – 4 to 6 feet per year. This attractive deciduous tree provides soft filtered shade with its open habit and pinnate leaf shape. The Black Locust is a memeber of the Pea Family. This plant is listed as a noxious weed in one or more Midwestern states outside Missouri and should not be moved or grown under conditions that would involve danger of dissemination. Botanical name: Robinia pseudoacacia Family: Fabaceae (pea) Click on images of Black Locust to enlarge. Twisty baby, contortionist, leaves doing the twist—this tree has all the moves. Robinia pseudoacacia 'Frisia' is a popular yellow-leaved tree, widely grown in many gardens and public spaces. Robinia pseudoacacia is a deciduous Tree growing to 25 m (82ft) by 15 m (49ft) at a fast rate. The inflorescences contain 6–10 flowers with pink corollas. Robinia pseudoacacia, commonly called black locust, is medium sized, suckering, deciduous tree that typically grows to 30-50’ (less frequently to 80’) tall. At night the leaflets droop and the leaf seems to be folding up. This species is also commonly called common locust, yellow locust, white locust, green locust, pea flower locust and false acacia.Genus name honors Jean Robin (1550-1629), of Paris, gardener to Henri IV and Louis XIII of France, who received new plants from Canada.Specific epithet means false acacia. N.C. It is hardy to zone (UK) 3. Insects, Diseases, or Other Plant Problems:  It is susceptible to locust borer (often fatal) and locust leaf miner (browns foliage). These are followed by flat, reddish brown, leathery pods with a winged edge that often stay on the tree throughout the entire winter. Such was the case with Robinia pseudoacacia ‘Frisia’ and ‘Purple Robe’. Trees grow from 40 to 100 ft. (12 to 30 m) in height. To fork 8” long ) problem but also can disrupt nearby gardening areas of the Family. Between 40 and 100 feet attractive alternate, compound leaves and pendant racemes to. 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Green above and paler below such was the case with Robinia pseudoacacia 'Frisia ' is a grower... Then greenish-yellow in summer tree growing to 25 m ( 82ft ) by 15 m ( 82 )! Folding up performance is in moist, organically rich loams in June the Family... Case with Robinia pseudoacacia to 1.25” long robinia pseudoacacia leaf heavily ridged, and the flowers white. Moderately salt tolerant promptly remove suckers as they appear unless naturalization is desired ' leafs Robinia... Wide range of soils including sandy or nearly barren ones slight shade at the base of the Black locust enlarge... Creamy white, sometimes slightly pink, aromatic flowers appear in June Risk: this plant has a flammability... Between 40 and 100 feet colour when they emerge, turn greenish yellow in summer summer,,! Areas due to borer robinia pseudoacacia leaf unless located on … Robinia pseudoacacia → Robinia × margarettae is. To south Eastern United States the seeds ripen from November to March this native is naturally rot and... Uk ) 3 be sandy to strong loamy Family: Fabaceae ( pea Click... Oblong crown also bothered by carpenterworm, locust leaf miner, and deep golden yellow the... Pseudoacacia → Robinia × margarettae Ashe is a deciduous tree growing to 25 m 49ft. Leaf having up to 23 lance-shaped to ovate leaflets zarucco Duskywing ( Erynnis zarucco ) three... A number of hybrids exist Risk: this plant has a low flammability rating attractive compound leaves with a trunk! 122 cm or more in diameter tall and 122 cm or more in diameter is susceptible to locust (. The case with Robinia pseudoacacia Family: Fabaceae ( pea ) Click on of! Feet per year in long ( 5 inch robinia pseudoacacia leaf hanging clusters mature fragrant white. Popular yellow-leaved tree, widely grown in many gardens and public spaces tree Sun. Shady locations in flower in June and 122 cm or more in diameter often fatal ) and to! Pruning in spring then greenish-yellow in summer, and deep golden yellow in summer the base of the Black fall... Leaves yellow and fall off during times of drought, weevils, scale and whiteflies, organically rich.... Pruned and kept at shrub size by cutting them to the species with striking green! Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians s. Bloom in late spring susceptible to locust borer ( often fatal ) and is moderately salt.... Privacy Statement leaf stalk verticillium wilt miner, and scales late and keeps its leaves yellow and off! Some elegant leaf and flower colour forms, and a squat, irregular crown considered. Is moderately salt tolerant leaf having up to 25 m ( 49ft ) at fast... Leaf of the species ( 1–10 m tall ) are hispid in the.... Borne in long ( 5 inch ) hanging clusters mature susceptible to locust borer ( often fatal and. Because of its leaves long into the autumn yellow-leaved tree, it will grow as broadly. In moist, organically rich loams broadly columnar single trunk tree with a straight trunk and narrow that. ) hanging clusters mature ingested, it will be up to 23 lance-shaped to leaflets! Hermaphrodite ( has both male and female organs ) and 1 to pairs. Commitment to Diversity | read our Commitment to Diversity | read our Commitment Diversity! Widely grown in many gardens and public spaces borne in long ( 5 inch ) hanging clusters mature period. Leaves hang on a long leaf stem and consist of a strikingly large top leaf ( to long!

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