This tree is a thornless robinia with an upright growth habit. Its root system is aggressive and a rapid grower – making it difficult to cut through underground roots… In many European countries, it is the source of the renowned acacia honey. Robinia pseudoacacia 'Frisia' is a popular yellow-leaved tree, widely grown in many gardens and public spaces. The Golden Robinia (Robinia pseudoacacia ‘Frisia’) was a vogue tree in Australian gardens and landscapes during the 1980s and is still popular today. have become a real problem in areas where the locust trees sprout everywhere as an invasive species. "Purple Robe" black locust (Robinia pseudoacacia "Purple Robe") can grow in some of the most difficult conditions and on a variety of sites. Noteworthy Characteristics. Fragrant wisteria-like white flowers in pendant racemes (to 8” long) bloom in late spring. It thrives in many difficult growing conditions. 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. It is advertised as thornless, but plants with thorns are found in commerce. The material presented on this website, may not be reproduced or distributed, in whole or in part, without the prior written permission of CTC Productions. At its best, it will grow as a broadly columnar single trunk tree with a narrow oblong crown. Locust trees (Robinia spp.) I have a beautiful 15 – 18 ft ‘Purple Robe’ tree and everyon in my neighbourhood loves it , as do I. I t is in a large flower bed and currently is doing fine, but in recent years I have been finding 1-2 volunteer seedlings that are Robinia, but would they likely be the white flowered original sopecies or would these by chance be true ‘Purple Robes’ . Fragrant white flowers appear on the tree for a short blooming period in spring. It is widely used as a street tree, particularly in polluted areas and, because of its small size and pretty colouring, was often recommended as a tree for suburban gardens. LAST DAY of the Rivendell Flower Show Today! If its roots are damaged (for example by a mower or whipper snipper or by digging) or if the roots hit an obstacle, such as a clay soil, they will produce suckers. Where is this species invasive in the US. Trees with invasive roots. If these trees experience a structural root failure and topple, these field lines can be destroyed, so it is important to keep a close eye on these as well. Not surprisingly, the roots can find their way into water pipes and septic systems. It is a deciduous tree with green compound leaves and sharp thorns and it is now naturalised in many parts of Europe, Asia and Australia. Robinias are grafted on to R. pseudoacacia rootstock (also known as false acacia or black locust), a vigorous green-leaved tree with thorns. Erect or Spreading with a High Canopy. The following tree species have invasive root systems that can damage sewer pipes. They should be cut off with a clean sharp cut as close as possible to the root. Native Range: Eastern and central United States, Suggested Use: Flowering Tree, Naturalize, Tolerate: Deer, Drought, Clay Soil, Black Walnut, Air Pollution. Roots are cut into 2” sections and planted in a potting mix or prepared seed bed . It is noted for its attractive compound leaves and pendant racemes of violet purple pea-like flowers. In order to raise trees that are genetically identical to a parent tree, cuttings are the only viable method, although cuttings of the Robinia Pseudoacacia can be difficult to root. While the tree is suitable for a wide range of sites, avoid extremely heavy clay and soils with excessive water moisture (standing water). Stress to the tree which causes the top part to die can also lead to suckering (as shown in our segment). Longevity 50 to 150 years. Bees are attracted to the flowers. Most acacia tree types are fast growers, but they usually live only 20 to 30 years. Locust Tree Identification. Has Deciduous foliage. ... Black Locust (Robinia psuedoacacia) is a fast-growing hardwood tree with fragrant white flowers. Q. Robinia "Frisia" - I am trying to find out what the root structure is on this tree. Save to My scrapbook Robinia psuedoacacia 'Frisia' with unknown dieback problems. Robinia pseudoacacia ‘Frisia’ needs a heavy pruning at least once a year – I often had it done 2 times a year. It is susceptible to locust borer (often fatal) and locust leaf miner (browns foliage). This tree is not generally recommended for prime landscape areas because of its suckering habit and its susceptibility to borers. Long white, pea-like flowers are fragrant and appear in early summer, followed by smooth brown seed pods. Don’s Expert Answers: Robinia tree, time to remove…, Don’s Expert Answers: can I damage the tree by…, Don’s Expert Answers: KAFFIR LIME TREE PRUNING, Don’s Expert Answers: Robinias wont shoot after prunning, Don’s Expert Answers: Small Fig tree with small fruit, Don’s Expert Answers: Leggy with yellow leaves and no winter buds, Don’s Expert Answers: didn't bloom, many small buds, Don’s Expert Answers: Identify flowering vine. 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. Best performance is in moist, organically rich loams. Don’s Expert Answers: Stunted sparse leaves and no... Don’s Expert Answers: Poor growing Lilly Pillies. Acacia Tree Facts. Robinia Pseudoacacia, also known as the Black Locust, is a fast-growing tree that spreads rapidly through root suckers. Width: 20 - 30 feet. Drought tolerant once established and generally low maintenance. Botanical name Leaves turn uneventful yellow in fall. Hi I have 2 robinia mop top trees in my front yard and they have sent sucker roots into my neighbors garden some 15 meters away and send sucker roots throughout my lawn every year. The upper most roots should only be a inch under the soil at most. The Golden Robinia, Mop Top Robinia and other ornamental forms of Robinia are attractive, small trees for warm to cool areas (Brisbane to Perth and south and mountain areas) but their suckering habit needs to be considered if these trees are chosen for a small garden. Roots of Populus (3:1), Fraxinus (2.5:1) and Robinia (1.7:1) also caused a disproportionate share of damage to buildings. Pinnate bronze-green leaves, with each leaf having up to 23 lance-shaped to ovate leaflets, are attractive during the growing season. Never plant near pipesA Rowen is a nicer Tree or a read pear for mine. For example, the Mop Top Robinia, with the botanical name Robinia pseudoacacia ‘Umbraculifera’ is grafted onto the Black Locust tree, Robinia pseudoacacia. Don’s Expert Answers: Can BBQ smoke effect a Flame Vine which is on a fence approx 3 feet above the bbq plate? A fast growing variety which is often grown as a standard with a ball of foliage which sits above a straight trunk. Purple Robe is a medium sized, suckering, deciduous tree that typically grows to 30-40 tall with an oval-upright habit. It is considered to be a good selection for difficult areas where other trees will not grow well. Suckers shoot up from roots throughout the yard and around the plant base in both living and cut trees and shrubs. Pinnate dark blue-green leaves, with each leaf having up to 23 lance-shaped to ovate leaflets. Damage to roots, for example by mowing or whipper snippering, can lead to suckering. They are are 5 yrs old and I'm thinking of cutting them down. Trees that caused comparatively little damage were Cupressus (3 percent of damage but 10 percent of tree population), Sorbus (0.2:1) and Prunus (0.3:1). Promptly remove suckers as they appear unless naturalization is desired. If they emerge around house foundations it is best they are removed whilst young. © 2018 CTC Productions | All rights reserved. Black locust is generally considered to be a very easy-to-grow tree. Leaves emerge an interesting bronze-red in spring, but eventually turn an uneventful yellow in … Grow in average, dry to medium, well-drained soils in full sun. Foliage which sits above a straight trunk least once a year – I often had it done 2 times year! 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