elaeagnus shrub diseases
Several fungal pathogens occasionally cause leaf spots on oleaster shrubs and Russian olive trees, but typically aren't serious enough to require chemical control. Some of the leaves are pale and droopy, and some have a sooty grey look on the underside. Pests May be affected by elaeagnus sucker but generally pest free Diseases May be affected by coral spot or a leaf spot (fungal) see leaf damage on woody plants Except for the seemingly endless pruning tasks, you won’t find an easier shrub to grow than Elaeagnus Russian olive. I have sprayed with various things, fed it … Elaeagnus is a durable shrub for Dallas gardens that is most often used as a backdrop, foundation plant or a hedge. The disease is usually fatal and has affected many plantings in the mid-west. Leaves are 24 inches long; they are silvery on both sides when young, later dark green above and silvery beneath. They are identified by their sea green and grey looking leaves, which have a silver scaly underside to them. The British Gardener The Tropical Years Old Faithful Plants . Wet Feet (physiological): Elaeagnus (Russian olive) is a hardy woody shrub with few disease problems. Dense and bushy, the leaves of this hardy shrub are olive green with silver-flecked undersides, adding a pretty two-tone effect to the yard on windy days. So, while elaeagnus is relatively low-maintenance, at least a certain level of care is required to keep your shrub in check. Fungicides can't prevent or treat this usually fatal plant disease, so control the spread of the verticillium wilt fungi by pruning out and destroying infected foliage. The beautiful, lance-shaped, green and silver leaves of the typical Elaeagnus shrub add light and brightness to the landscape. Evergreen Shrub – Large Dark Green leaves speckled silver with silver undersides. Elaeagnus from Burncoose Nurseries Varieties of Elaeagnus available to buy include the following: ELAEAGNUS angustifolia ,ELAEAGNUS commutata ,ELAEAGNUS x ebbingei ,ELAEAGNUS … Tolerant of dry soils and salt, it’s perfect for growing in exposed, coastal gardens. These plants bear fragrant, light-colored flowers that give way to edible, red or yellow, olive-like fruits. Close-up of elaeagnus's mottled-red berries Top of elaeagnus leaf. Killing while it is still small, or even while it is an individual large shrub rather than a dense inaccessible thicket is key. The Russian olive and oleaster both prefer fully sunny locations, but the latter can handle partially shady conditions as well. Facts: Elaeagnus. Thorny Elaeagnus (Elaeagnus pungens), also called silverthorn or thorny olive, is a fast-growing evergreen shrub that … From May to June, it is adorned with very beautiful yellowish white flowers, very fragrant and honey. These plants attract birds with their fruit, and the berries are edible for humans. They produce small fragrant white flowers during the autumn months which are then followed by bright orange fruits in the spring. Plant Description Evergreen shrub with wood stems and noticeable gray-green leaf texture. The shrub I would say is around 10ft high and 6ft wide and has been in the garden for more than 10 years. Elaeagnus family members can typically handle various soil conditions, but require well-drained locations. Elaeagnus: This contains about 45 species of evergreen and deciduous shrubs, some of which become scrambling climbers when planted under trees. Trees-Acacia. Thorny elaeagnus (Elaeagnus pungens) is a great evergreen shrub which is blooming right now. Russian olives shrubs are very drought tolerant, and you’ll probably never have to … Elaeagnus pungens is an evergreen shrub that is able to grow 3 to 25 feet in height. Department of Plant Pathology & Microbiology. Elaeagnus pungens ‘Maculata’ is a large and hardy evergreen shrub, bearing bright golden leaves with large, irregular green margins. The diseases of elaeagnus leaf spots. Synonyms Elaeagnus × ebbingei. Leaves are evergreen in warm winter climates, but semi-evergreen to deciduous near the northern edge of its growing range. While taking Goumi and Elaeagnus care, it is important to know that too. A white, cottony mold may be evident on the lower stems near the ground line. Bigfoot Cleyera - Live Fast Growing Evergreen Shrub, Glossy Foliage: Price $ Elaeagnus should be planted on well-drained sites and not in low spots or in soils that retain water. Fertilize infected trees and prune out dead branches. Hybrid derived from Elaeagnus pungens. Although technically a shrub, Elaeagnus pungens is capable of climbing and can attach to … The disease causes wilting and browning of leaves on affected branches. verticillium. Views: 18209; Replies: 7; Posted: Fri. 23rd April 2010 12:22; Possible suggestions. The eye follows the shrub’s repeated green, but then pauses naturally at specific garden features or vivid colors in other plantings. Nitrogen fixation. Its common name, silverthorn, comes from the thorns on its branches. Buy oleaster ( syn. Young branchlets are covered with brown scales. These shrubs can fix nitrogen from the air, so they need no nitrogen fertilizer. Clusters of fragrant, bell-shaped flowers open on its delicate branches in late fall, followed by small orange-red fruits in spring. The Elaeagnus Ebbingeii hedging is a beautiful evergreen shrub that grows large in size. Elaeagnus umbellata is a thorny shrub native to Asia. When planted under trees it will adopt a semi-climbing habit and will reach its way up into the bottom branches. If drainage is an issue, dig a hole that is 2 inches shallower than the rootball. Elaeagnus × ebbingei ) Elaeagnus × submacrophylla - Great as an informal hedge: ... the leaves of this popular evergreen shrub mature to a lustrous green, but always retain their silvery undersides. Description. Elaeagnus berries are ripe in mid-to-late February. ELAEAGNUS Elaeagnus macrophylla. Perennial Flowers + Moneyplant. This article focuses on shrubs. E. x ebbingei is an evergreen shrub growing perhaps 5 metres high and eventually about the same wide. Constantly soggy soil can and often will cause root rot or other harmful or deadly plant diseases. Oleaster shrubs need at least 12 feet of space for healthy airflow. Find out how to grow Elaeagnus pungens 'Maculata' British Broadcasting Corporation Home. Genus Elaeagnus can be deciduous or evergreen shrubs or small trees, with simple, often silvery-scaled leaves, and small fragrant tubular flowers borne in clusters in the leaf axils, and followed by small juicy fruit . Elaeagnus growing in pots appreciate a moist, but well-drained soil. help! Verticillium wilt is a vascular disease that occasionally attacks and kills members of the Elaeagnus plant family. Elaeagnus shrubs should be planted in autumn where hard frost and snow are rare, and in spring several weeks after the last frost in colder climates. Commonly grown plants in this genus include the Russian olive (Elaeagnus angustifolia) and the oleaster (Elaeagnus macrophylla), which grow in U.S. Department of Agriculture plant hardiness zones 3 through 8 and 7 through 9, respectively. Can anyone advise what's happening? How to Care for the Plant Called Minuet Weigela, My Aptos Blue Redwood Trees Are Turning Brown, Missouri Botanical Garden: Elaeagnus Macrophylla, Oregon State University: Oleaster, Russian Olive (Elaeagnus), University of Illinois Extension: Fungal Leaf Spot Diseases of Shade and Ornamental Trees in the Midwest, University of Minnesota Extension: Phomopsis Canker & Gall, University of Massachusetts Amherst Agriculture & Landscape Program: Verticillium Wilt, Cal Poly Urban Forest Ecosystems Institute: Russian Olive, University of Wisconsin Cooperative Extension: Russian Olive Disorder: Phomopsis Canker, University of Nevada Cooperative Extension: Management of Verticillium Wilt of Olive. It sprouts prolifically from its stem, spreading out and twining into adjacent vegetation. Take caution when handling this plant. 2.25 Gal. It has significant resistance to honey fungus and most other diseases and pests, with the exception of slugs, which will feed on young shoots. Why Are the Leaves of My Eastern Redbud Tree Dying? Leaf Spots (fungi – Cercospora carii, Cercospora elaeagni, Phyllosticta argyrea, Septoria argyrea): Spots may vary in size, color and shape. Elaeagnus species are used as food plants by the larvae of some Lepidoptera species including Coleophora elaeagnisella and the Gothic moths. Space Russian olive trees at least 20 feet away from other plants or structures to promote ample air circulation. Zones MS, LS, CS; USDA 7-9. Elaeagnus multiflora, commonly called goumi or gumi, is a deciduous to semi-evergreen shrub that typically grows in a rounded form to 6-10' tall. It could also be the work of an insect - the "vine weevil" is known to feast on elaeagnus shrubs. Elaeagnus x ebbingei is a fast-growing evergreen shrub with large leaves that have a silvery underside. Although typically hearty and adaptable, these plants can still suffer from a few diseases. Cryptomeria Globosa Nana Shrub: 3 Gal. How to Prune a Thorny Elaeagnus. Will bark be infested too? Pride of Barbados. They provide silvery or frosted leaves, fragrant flowers, and edible (sometimes colorful) fruit to the garden. Problem with Elaeagnus x ebbingei 'Limelight' Dear Crocus, I have a large Elaeagnus shrub in my garden which is starting to look very sickly in parts. The Phyllosticta leaf spots disease (Phyllosticta argyrea) causes black or light to dark brown spots to appear on foliage. Tiny, fragrant, silvery owers in fall. Hybrid derived from Elaeagnus pungens. While elaeagnus are suitable for small to medium size, they can grow up to 6ft if left completely unpruned. They tend to have a few wild sprouts periodically throughout the year requiring a little pruning. Elaeagnus Plant Care. Russian olive trees are somewhat susceptible to canker disease pathogens (Phomopsis arnoldiae) that thrive in humid climates. Elaeagnus are deciduous or evergreen shrubs (small trees), with silvery-scaled leaves, and clusters of small fragrant flowers by small juicy fruit. The Elaeagnus plant genus (Elaeagnus spp.) Elaeagnus from Burncoose Nurseries Varieties of Elaeagnus available to buy include the following: ELAEAGNUS angustifolia ,ELAEAGNUS commutata ,ELAEAGNUS x ebbingei ,ELAEAGNUS … One wonderfully-scented elaeagnus flower appears at the base of each leaf around Thanksgiving. Elaeagnus x ebbingei. Excellent as a hedge, backdrop or specimen, Olive Martini provides sturdy structure and stable color. In fact, the Russian olive tree grows and self-seeds so quickly in some climates that it's considered moderately invasive in several California regions. It is a tough plant that can handle a variety of different soil types and light conditions. Elaeagnus, while seemingly slow to spread, once established becomes the dominant vegetation and is extremely hard to kill. Although silverthorn is primarily considered a shrub, it also can take the form of a climbing plant, growing over and shading out other plants. Possibly the best known of those grown for their fruit are E. multiflora (the Goumi) and E. angustifolia (the winter olive). Pruning Elaeagnus. Trim back unwanted branches in spring. If you had a particularly harsh winter, your elaeagnus may have suffered a cold injury or, given that your bush is 20 years old, it could be old age and weariness. Brown fruiting bodies (sclerotia) are often scattered through the cottony fungus growing on the stem. consists of large shrubs or small trees with bushy forms and silvery-gray foliage. Many Elaeagnus species harbor nitrogen-fixing organisms in their roots, so are able to grow well in low-nitrogen soils. Elaeagnus angustifolia (Russian olive). Trunk cankers often split open and ooze sap. Name – Elaeagnus x commutata Family – Elaeagnaceae Type – shrub. Elaeagnus Hedge Planting Distances – Single row. Elaeagnus Shrub Care. It is a large, bushy, rounded shrub that typically grows to 8-10' tall and as wide. The leaves develop a stickly black type o mould and the hedges seems to be dying from the inside out. In autumn, ... How to control diseases. More upright (to 1012 feet high and wide) than its parent, with thornless branches. Elaeagnus multiflora, commonly called goumi or gumi, is a deciduous to semi-evergreen shrub that typically grows in a rounded form to 6-10' tall.It is noted for producing edible bright red berry-like fruits (reminiscent of small cherries) in summer. They are identified by their sea green and grey looking leaves, which have a silver scaly underside to them. Thanks Katy, I had a fear it may be verticillium wilt but wasn't sure how to test for it. Elaeagnus ebbingei is the kinder gentler version with nice smooth stems. Elaeagnus ‘Quicksilver’ is a large, deciduous shrub with silvery, willow-like leaves. Its leaves are narrowly oval with wavy edges, 5-10cm long, ... Diseases Generally trouble free It will be sure to light up any corner or dull-looking spot, immediately! A very popular and reliable evergreen shrub that has many different uses. Elaeagnus pungens is a dense, branching shrub which can reach over 7 metres (23 ft) tall by 4 metres (13 ft) wide. Trim hedges in early and late summer. Vibrant foliage edged in gold creates a striking display in the sunny border. Parts of the stem are covered in thorns which can be up to 8 centimetres (3.1 in) long. © Copyright 2020 Hearst Communications, Inc. Details E. umbellata is a deciduous bushy shrub to around 5m tall and wide. Cercospora leaf spots (Cercospora spp.) Oleaster hedge plants, also known as Elaeagnus ebbingei are one of our favourite species. Verticillium wilt is a vascular disease that occasionally attacks and kills members of the Elaeagnus plant family. Elaeagnus is often killed by verticillium wilt in the east in wet areas or poorly drained sites. More common in humid climates than in arid environments, the fungal pathogens (Verticillium dahliae) prefer attacking plants growing in poorly draining soils. Family Elaeagnaceae . Placing your plant in the proper growing location helps keep it healthy enough to withstand disease pathogens. The Elaeagnus Ebbingeii hedging is a beautiful evergreen shrub that grows large in size. Few shrubs grow as fast as Elaeagnus, too, making this an excellent choice for hedges and green screens where you want to obscure a less-than-desirable view. 'elaeagnus drooping and turning yellow.' These fungi are rarely severe enough to warrant control measures. Leaves are 24 inches long; they are silvery on both sides when young, later dark green above and silvery beneath. Click for a hub of Extension resources related to the current COVID-19 situation. They produce small fragrant white flowers during the autumn months which are then followed by bright orange fruits in the spring. An easy-to-grow hardy shrub that is tolerant of most soils and situations, and requires very little care or attention. Cankers don't respond to chemical controls, so prune off and destroy any infected branches to prevent spreading the diseases. The flowers are as fragrant as gardenias, but hidden within the bushes. Oleaster is a tough evergreen shrub that boast small but highly scented creamy white flowers in autumn followed by small orange fruits in spring. Therefore, we recommend a container with a drainage hole(s), and a quality potting soil or potting mix, or a 50/50 combination thereof, for planting. Find help & information on Elaeagnus umbellata autumn oleaster from the RHS. Texas Redbud. Description. Ten species and 15 cultivars are currently offered in British nurseries, all of them as ornamental plants. Reply from Katy Elton . There is a miniscule white dust/mite on the leaves and they are quite sticky. 9.25 in. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees. I find mixing Elaeagnus throughout beds visually unites each area of my garden. It is native to open woodlands, thickets and wood margins in China and Japan. It makes a colourful winter foliage plant and is excellent for using as screening and in winter flower arrangements. Branchlets lack spines. Elaeagnus should be planted on well-drained sites and not in low spots or in soils that retain water. Use as specimens, in a border, or as hedging. Home. Another way I’ve used the shrub in our yard (and also my favorite way) was to plant it randomly throughout adjacent shrub beds. Can be grown in most soil, types and conditions and is quite a vigorous, fast-growing variety. Most leaf spot diseases thrive in overcrowded growing conditions. They tend to have a few wild sprouts periodically throughout the year requiring a little pruning. Thorny elaeagnus (Elaeagnus pungens) is a great evergreen shrub which is blooming right now. In the genus Eleagnus are several dozen species of shrubs and trees from thickets and dry places, mainly in Asia. Leaves on infected branches often wilt and the branches themselves can suffer dieback if the canker girdles the entire limb. It has very beautiful bluish green foliage with silver cuffs which turns yellow in autumn. Plants with heavy infestations of elaeagnus sucker become covered with honeydew, a sugary excrement from the suckers, on which can grow a black sooty mould. Click on any of the 17 plants listed below in the genus Elaeagnus to read more about that plant, or go back to the genus a-z . Numerous spots cause infected foliage to turn brown and defoliate prematurely. The blossoms are followed by the development of colorful, sweet berries, creating a showy display on the thorny stems. Prune off the limbs at least 6 inches below the canker infection to make sure you cut into healthy wood. The woody portion of the crown will be darker than in the branches and stems. As the disease progresses, black fungal spores form in the centers of the spots. This disease does not normally attack older plants. Clouds of this comes off if a branch is shaken. It is noted for producing edible bright red berry-like fruits (reminiscent of small cherries) in summer. It can be planted as a hedge and clipped twice a year for a formal finish or trained as a wall shrub. Many Elaeagnus species harbor nitrogen-fixing organisms in their roots, so are able to grow well in low-nitrogen soils. Therefore, we recommend a container with a drainage hole(s), and a quality potting soil or potting mix, or a 50/50 combination thereof, for planting. Its leaves have a distinct gray-green color with a sandpaper like texture. Plant thorny Silverberries in a low-traffic area and allow plenty of space so they can grow without being pruned. Cutting the base of the plant with a knife soon after it dies will show that the base of the plant and the roots died before the upper part of the plant. Prune out heavily infected foliage if it becomes unsightly. Noteworthy Characteristics. Height and spread: 10-15ft (3-4.5m). 2.5 Qt. Silvery new growth adds seasonal interest to this evergreen shrub. Evergreen shrub. Silvery new growth adds seasonal interest to this evergreen shrub. While taking Goumi and Elaeagnus care, it is important to know that too. Big leaf Maple. Taking Care of Elaeagnus. Evergreen shrub. Elaeagnus × ebbingei, commonly called oleaster or Ebbing's silverberry, is a cross between Elaeagnus macrophylla × Elaeagnus pungens. AgriLife Extension's online Bookstore offers educational information and resources related to our many areas of expertise and programming; from agriculture, horticulture, and natural resources to nutrition, wellness for families and youth, and much more. The thorny shrubs can also provide good nesting sites for birds. Problem with Elaeagnus x ebbingei 'Limelight' Dear Crocus, I have a large Elaeagnus shrub in my garden which is starting to look very sickly in parts. posted on Shoot. Tiny, fragrant, silvery owers in fall. Impacts Clusters of inconspicuous, yet highly fragrant yellow flowers appear in summer. Oleaster 'Limelight' hedge (Elaeagnus × ebbingei 'Limelight') description A vibrant evergreen, Oleaster 'Limelight' is admired for its fragrant, small white flowers in winter and yellow centred leaves, margined with green. Elaeagnus x ebbingei is an evergreen Shrub growing to 5 m (16ft) by 5 m (16ft) at a medium rate. Elaeagnus maculata is also known as the 'Golden Eleagnus' due to it's striking golden, variegated leaves. In addition to eye-catching foliage, these robust shrubs bear clusters of sweetly fragrant, pale yellow or bright white flowers each spring. Fifteen Novel Universal Primer Pairs For Sequencing Whole. i planted an elaeagnus hedge last autumn and this spring the plants are gradually turning yellow and the leaves drooping. Red fruit makes good jelly. Silverberry is a very beautiful ornamental evergreen shrub.. It’s native to the Americas and is a perfect alternative to invasive Russian Olive.. Summary: key silverberry facts. Many shrub diseases are obvious at first glance, producing such symptoms as shriveled, spotted, browning or deformed leaves and limp stems. Can I use it to grow honeysuckle ... Q. Elaeagnus Leaves Are Distorted - I just noticed that some leaves on my elaeagnus plants are distorted. Both the Russian olive and the oleaster need regular pruning to keep plants within their growing areas. The thorns on Elaeagnus pungens are up to 2" long & they aren't messing around, so beware! Of course, climate and growing conditions will govern how quickly your ... Shrub Plants + Acacia. Let us return to the species that this chapter is mainly concerned with. Plants will die so rapidly that leaves are not shed but are retained on the plant. Zones MS, LS, CS; USDA 7-9. When fertilizing privet grown in containers, be careful to apply a fertilizer that will not burn the roots (such as a slow release or a liquid fertilizer). More upright (to 1012 feet high and wide) than its parent, with thornless branches. Plants usually wilt as the stems rot at or below the soil line. It is, however, vulnerable to excessively wet soils. Features: Fast growing, Salt Tolerant, Coastal Hedge, Flowers, Fruit. Pot - Elaeagnus x Ebbingei With Fragrant Discreet Blooms, Live Evergreen Shrub Elaeagnus Ebbingei have unique green foliage Elaeagnus Ebbingei have unique green foliage with silver bottoms with an upright and dense growth habit. Olive Martini Elaeagnus is very easy to grow however it may be helpful to know that a very small plant which is planted in the ground will take about 1/8 - 1/4 cup of espoma organic shrub-tone fertilizer. Reply from sharron stott . Small elaeagnus shrub. Although they are not particularly showy, Elaeagnus shrubs make attractive specimen plants and effective, low-key borders. It grows to a height and widtt of around 6-8' and has leggy shoots of foliage when not clipped. The shrub I would say is around 10ft high and 6ft wide and has been in the garden for more than 10 years. Wet Feet (physiological): Elaeagnus (Russian olive) is a hardy woody shrub with few disease problems. The flowers are as fragrant as gardenias, but hidden within the bushes. Elaeagnus pungens is an evergreen shrub that is able to grow 3 to 25 feet in height. Serious cases may result in the leaves turning yellow and falling from the plant. Indeed, this plant is relatively quick-growing and if untrimmed will grow around 1 to 1.5ft in height per year. Cotton Root Rot (fungus –Phymatotrichum omnivorum): As with most woody ornamentals, elaeagnus will die quite rapidly when infected with the cotton root rot fungus. Elaeagnus growing in pots appreciate a moist, but well-drained soil. Ecology. Avoid removing wood that is more than a few years old. Red fruit makes good jelly. If you suspect a disease, examine the whole shrub or, if it is part of a dense hedge, as much of it as you can. With both leaf spot diseases, infected tissue sometimes falls out of the leaf, giving the foliage a raggedy, shot-hole appearance. It is hardy to zone (UK) 6 and is not frost tender. Insects, Diseases, and Other Plant Problems: No serious insect or disease problems though fungal leaf spot and rust may occur and spider mites can attack stressed plants. Elaeagnus umbellata. The fungi invade the wood tissue that transports water and minerals throughout the tree, which results in the plant appearing water stressed. How to Prune a Thorny Elaeagnus. Thanks. Fragrant silvery flowers appear in autumn followed by orange berries in spring. No controls are known. Family: Eleagnaceae Genus: Elaeagnus (e-lee-AG-nus) Common: Silverberry, Autumn Olive, Goumi Berry, Russian Olive Origin: Native to Asia & Southern Europe Characteristics: There are around 45 species of shrubs and small trees in this genus. Q. When purchasing Elaeagnus ‘Limelight,’ do not buy … Elaeagnus Shrub Commonly known as Ebbing's Silverberry, Elaeagnus Commonly known as Ebbing's Silverberry, Elaeagnus features leathery, elliptical leaves that emerge silver before maturing to a lustrous dark green with silvery-gray undersides. It is, however, vulnerable to excessively wet soils. Yellow Wild Indigo. Elaeagnus pungens is a dense, branching shrub which can reach over 7 metres (23 ft) tall by 4 metres (13 ft) wide. Excellent as a hedge, backdrop or specimen, Olive Martini provides sturdy structure and stable color. Black pustules eventually develop on infected wood tissue. Large Elaeagnus 15′ By 10′ Some Leaves Yellowing Then Turning Brown And Curl - Many insects on plant, possiby scale and aphids. Bottom of elaeagnus leaf. A tough pollution tolerant shrub that makes an ideal informal hedge or screen. Rock Oak Deer Plant Abc S E Is For Elaeagnus. Some of the leaves are pale and droopy, and some have a sooty grey look on the underside. Height – 6 to 10 feet (2 to 3 meters) depending on the variety Exposure – full sun, part sun Soil – ordinary Elaeagnus Hedge Growing Advice. I have a well established hedge of Eleagnus Pungens which is the last two years has been attacked by some sort of bug/disease. Elaeagnus × ebbingei 'Limelight' creates a dense, bushy hedge ideal for privacy screening. This variety is very easy to grow. It sprouts prolifically from its stem, spreading out and twining into adjacent vegetation. Japanese Boxwood (Buxus) Shrub, Live Evergreen Hedge Plant with Green Deer-Resistant Foliage: 2.25 Gal. Cankers are sunken, black or rust-colored areas that form on infected trunks or limbs. Elaeagnus is a durable shrub for Dallas gardens that is most often used as a backdrop, foundation plant or a hedge. Prune off and destroy any severely infected foliage to make your plant look more attractive. Likes full sun or partial shade. A unique education agency, the Texas A&M AgriLife Extension Service teaches Texans wherever they live, extending research-based knowledge to benefit their families and communities. Here are some other general reasons a plant s leaves might turn yellow. Severe infections can cause premature defoliation and branch dieback. It grows to a height and widtt of around 6-8' and has leggy shoots of foliage when not clipped. Thorny elaeagnus (Elaeagnus pungens) and variegated elaeagnus (Elaeagnus pungens "Maculata") grow best in U.S. Department of Agriculture plant hardiness zones 7 to 9, while the Russian olive shrub (Elaeagnus angustifolia), autumn olive (Elaeagnus umbellata) and silverbush elaeagnus (Elaeagnus "Quicksilver") are more cold tolerant and grow best in USDA plant hardiness zones 4 to 8, 3 … Parts of the stem are covered in thorns which can be up to 8 centimetres (3.1 in) long. 2-3 plants per metre. Dig a planting hole that is two to three times wider than the shrub's rootball and of the same depth. It is in leaf all year, in flower from October to January, and the seeds ripen from April to May. Click image to enlarge . Elaeagnus species are used as food plants by the larvae of some Lepidoptera species including Coleophora elaeagnisella and the Gothic moths.The thorny shrubs can also provide good nesting sites for birds. look brown or gray with darker margins. Elaeagnus Shrub: 2.25 Gal. Symptoms include the sudden wilting and discoloration of leaves on one or more limbs. Flowers are small and often fragrant, usually white or white with pale brown dotting. Vibrant foliage edged in gold creates a striking display in the sunny border. Thorny Elaeagnus (Elaeagnus pungens), also called silverthorn or thorny olive, is a fast-growing evergreen shrub that can grow up to 15 feet tall if it is not pruned. Southern Blight (fungus – Sclerotium rolfsii): Southern blight primarily attacks elaeagnus in the seedling stage. Constantly soggy soil can and often will cause root rot or other harmful or deadly plant diseases. Nitrogen fixation. With a range of varieties and sizes to choose from, you can expect your shrubs to grow to heights of 6-15 feet with widths in proportion to their mounded shape. New growth is often distorted and some damaged leaves may drop off.