Compactum has a heavyset physical body , get up to 3 feet tall , and bears sizable pink flowers . Shrubby , evergreen plant “ ironclad ” rhododendron with medium leave . There are between 500 and 900 specie of evergreen and deciduous plants in the Rhododendron genus . Azaleas flow into this family . The evergreen plant rhododendron is characterized by medium to long , oviform leaves and prominent , cluster , truss of , tardy , showy , spring to early summertime efflorescence , range in color from ruddy , pinkish , lily-white , lavenders , purples and even yellow and orange . spring perchance low and mounding to gangly and almost tree - like with age . All rhododendron enjoy well - drained , acid soil and should be planted high , preferably on lift beds . fond shade is preferable too , though many plant life farm quite well in full sun in cooler , more forgiving climates . In universal , the evergreen rhododendron tends to do well in cool region of zone 7 and lower , thriving in the Appalachian Mountains and the Pacific Northwest .
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Characteristics
Requirements
Plant Care
Fertilizing
Light
Watering
Planting
Pruning deciduous shrubs can be divided into 4 group : Those that requireminimal pruning(take out only beat , pathologic , damaged , or span branches , can be done in early spring.);spring pruning(encourages vigorous , new growth which produces summer flowers - in other words , bloom come out on newfangled wood);summer pruning after flower(after flowering , cut back shoots , and take out some of the former growth , down to the ground);suckering habit pruning(flowers appear on wood from previous year . Cut back bloom stem turn by 1/2 , to strong growing new shoots and take 1/2 of the flowered stems a duo of inch from the basis ) Always remove utter , discredited or pathologic wood first , no matter what type of pruning you are doing .
Examples : Minimal : Amelanchier , Aronia , Chimonanthus , Clethra , Cornus alternifolia , Daphne , Fothergilla , Hamamelis , Poncirus , Viburnum . outpouring : Abelia , Buddleia , Datura , Fuchsia , Hibiscus , Hypericum , Perovskia , Spirea douglasii / japonica , Tamarix . Summer after flower : Buddleia alternifolia , Calycanthus , Chaenomeles , Corylus , Cotoneaster , Deutzia , Forsythia , Magnolia x soulangeana / stellata , Philadelphus , Rhododendron sp . , Ribes , Spirea x arguta / prunifolia / thunbergii , Syringa , Weigela . Suckering : KerriaHow - to : Planting ShrubsDig a hole twice the size of it of the root ball and recondite enough to plant at the same level the shrub was in the container . If soil is poor , dig hole even wide and fill with a mixture half original dirt and half compost or soil amendment .
Carefully remove shrub from container and mildly disjoined roots . Position in nitty-gritty of hollow , best side facing onwards . Fill in with original dirt or an meliorate mixture if needed as described above . For larger shrubs , build a water well . Finish by mulching and water well .
If the flora is ball - and - burlapped , remove fixing and fold back the top of natural burlap , tucking it down into gob , after you ’ve positioned bush . ensure that all gunny is buried so that it wo n’t wick water away from rootball during hot , juiceless time period . If synthetic gunny , remove if possible . If not possible , cut away or make slits to allow for roots to evolve into the unexampled grime . For larger shrubs , establish a water well . Finish by mulch and irrigate well .
If shrub is au naturel - root , look for a discolouration somewhere near the foundation ; this mark is likely where the soil line was . If dirt is too sandlike or too clayey , sum up organic matter . This will help with both drain and piddle belongings electrical capacity . Fill soil , firming just enough to support bush . Finish by mulch and irrigate well .
Problems
potential controls : keep weeds down ; purpose screening in windows to keep them out ; slay infested plants away from non - infested plants ; habituate a reflective mulch ( Al foil ) under plants ( this repels whiteflies ) ; ambush with yellow sticky cards , use labeled pesticide ; further innate foe such as parasitic WASP in the garden ; and sometimes a good stiff shower of water will moisten them off the plant life . Pest : AphidsAphids are diminished , soft - bodied , tardily - moving insects that suck fluids from plants . Aphidscome in many colours , roll from green to brown to black , and they may have wing . They attack a all-inclusive range of plant species causing stunting , deformed folio and buds . They can transmit harmful industrial plant viruses with their pierce / take in mouthpart . Aphids , generally , are merely a nuisance , since it takes many of them to cause serious plant impairment . However aphids do produce a sugared substance call honeydew ( coveted by ants ) which can go to an unattractive ignominious surface growth name jet mold .
Aphids can increase speedily in numeral and each female can produce up to 250 hot nymph in the course of a calendar month without mating . Aphids often appear when the surround changes - spring & fall . They ’re often mass at the tip of outgrowth feeding on lush tissue paper . Aphids are draw to the colouration yellowness and will often hitchhike on icteric clothing .
Prevention and Control : Keep skunk to an downright minimum , specially around suitable plants . On eatable , wash out off infected area of plant . gentlewoman hemipteran and lacewings will course on aphids in the garden . There are various products - constituent and inorganic - that can be used to control aphids . Seek the recommendation of a professional and stick to all recording label procedure to a tee . fungus : RustsMostrustsare host specific and overwinter on folio , staunch and spent flush debris . Rust often appear as pocket-sized , bright orange , yellowish , or chocolate-brown pustules on the bottom of leaf . If impact , it will leave a dark-skinned spot of spore on the digit . because of fungi and spread by splashing water or rain , rust is unfit when weather is moist .
Prevention and Control : establish resistant varieties and provide maximum atmosphere circulation . Clean up all junk , especially around industrial plant that have had a problem . Do not irrigate from disk overhead and water only during the day so that works will have enough time to dry before night . use a fungicide label for rust on your plant . Fungi : Powdery MildewPowdery Mildewis usually find on plants that do not have enough air travel circulation or adequate light . job are big where nights are cool and days are tender and humid . The powdery white or gray fungus is usually found on the upper airfoil of leaves or fruit . Leaves will often turn yellow or browned , coil up , and drop off . newfangled leaf emerges crinkled and distorted . Fruit will be dwarfed and often drops early .
Prevention and Control : set resistant varieties and blank space plants properly so they receive decent light and air circulation . Always water from below , keep water off the foliage . This is paramount for roses . Go slow on the atomic number 7 plant food . utilise fungicides according to recording label directions before problem becomes severe and travel along directions just , not missing any expect treatments . Sanitation is a must - clean up and remove all leaf , flowers , or debris in the pin and destroy . pesterer : CaterpillarsCaterpillars are the immature form of moth and butterfly . They are voracious feeders attacking a wide variety of plants . They can be highly destructive and are characterized as leaf birdfeeder , stem turn borers , folio rollers , cutworms and tent - former .
Prevention and Control : keep grass down , sentinel private plants and remove caterpillars , employ labeled insect powder such as soaps and oils , take advantage of natural enemies such as parasitic wasps in the garden and use Bacillus thuringiensis ( biologic war ) for some caterpillar mintage . Diseases : Pythium and Phytophtora Root RotRot Rot , PythiumorPhytophthoraoccurs when soil moisture degree are excessively high and fungal spore present in the filth , come in inter-group communication with the susceptible works . The base of stems discolor and contract , and leaves further up the still hunt wilting and die . leave-taking near base are affected first . The roots will change state ignominious and rot or break . This fungi can be introduced by using unsterilized grease mix or contaminate piss .
Prevention and ControlRemove affect plants and their roots , and discard skirt dirt . Replace with plant that are not susceptible , and only use fresh , desexualize dirt mixing . Hold back on fertilizing too . examine not to over water plant and make certain that ground is well enfeeble prior to planting . This fungus is not treatable by chemical substance .
Rhizoctonia Root and Stem Rot symptom depend like to Pythium Root Rot , but the Rhizoctonia fungus seems to thrive in well drained soils . Pest : Scale InsectsScales are insects , related to mealy microbe , that can be a problem on a extensive variety of plant - indoor and outdoor . Young surmount crawl until they witness a good feeding website . The adult females then mislay their legs and remain on a spot protected by its hard scale level . They look as bumps , often on the low sides of parting . They have pierce mouth parts that suck the sap out of plant tissue . Scales can weaken a works leading to white-livered leafage and leaf cliff . They also produce a fresh substance yell honeydew ( covet by emmet ) which can pass to an untempting opprobrious surface fungal growth call sooty mold .
Prevention and Control : Once established they are difficult to control . Isolate infest plants away from those that are not invade . Consult your local garden centre professional or Cooperative Extension berth in your county for a sound good word regarding their ascendancy . promote instinctive enemies such as bloodsucking WASP in the garden . Diseases : BlightBlights are cause by fungus kingdom or bacteria that pop plant tissue . Symptoms often show up as the rapid espial or droop of leafage . There are many different blight , specific to various plants , each expect a varied method acting of control . Pest : LacebugsLacebugsare white to pale brown , 1/8 inch long , rectangular in shape with have lacy wings and unremarkably find on the underside of leaves where they suck sap . nymph may seem spiny and sinister than adults . Lacebugs , which do not fly , are sometimes confuse with whitefly that do fell . terms unremarkably appear as stipples or " " discolorise - count " " spot on the leafage . Hard , black excretion can usually be found on the underside of leaves . Damage is most seeable during the summer , especially on trees . Flowering shrubs , though active , appear weak and almost exanimate .
Prevention and Control : If infestation is mild , wash aside with a jet of soapy water or prune out overrun leaves or limbs . Timing is important : spray according to the Growing Degree Days ( GDD ) in your area . To master insects , spray underside of leave with a recommended insecticide grant to label directions . condition : ChlorosisEntire leaves or surface area around vein in leaves appear yellow . This is the result of decreased iron consumption from the soil due to high pH or waterlogged soil . It is authoritative to know the pH requirements of plants . Prior to planting , rectify soil to meliorate drainage and correct pH , if necessary . Chlorosis is common in plants growing close to concrete or plant in alkaline soil . care for with an iron appurtenance accord to recording label directions .
