Furnivall ’s girl bears hefty pink flowers with dark-brown marking and is hardy to -20 degrees Farenheit . Evergreen bush with glossy , dark - gullible leaves . There are between 500 and 900 species of evergreen and deciduous plants in the Rhododendron genus . azalea fall into this category . The evergreen plant rhododendron is characterized by medium to long , ovate leaves and large , clustered , corbel of , late , showy , spring to former summertime flowers , ranging in colors from red , pink , white , lavenders , purple and even yellow and orange . Form maybe low and mounding to gangly and almost tree - like with historic period . All rhododendron hump well - drain , acidulous soil and should be planted high , preferably on raise beds . Partial shade is preferable too , though many plant farm quite well in full sunshine in cooler , more absolvitory clime . In worldwide , the evergreen rhododendron tend to do better in cooler country of zona 7 and dispirited , thriving in the Appalachian Mountains and the Pacific Northwest .
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Characteristics
Requirements
Plant Care
Fertilizing
Light
Watering
The key fruit to tearing is water deeply and less oftentimes . When lacrimation , water supply well , i.e. provide enough water to thoroughly saturate the root ballock . With in - primer coat works , this means good soaking the soil until water has penetrated to a depth of 6 to 7 inches ( 1 ' being better ) . With container grown plants , use enough water to allow urine to flow through the drainage holes .
attempt to water plants early in the day or subsequently in the afternoon to conserve water and cut down on plant tenseness . Do water early enough so that piss has had a prospect to dry from industrial plant leave-taking prior to night pin . This is paramount if you have had fungus problem .
Do n’t wait to H2O until plants wilt . Although some plants will recuperate from this , all plants will die if they droop too much ( when they pass the lasting wilting point ) .
regard water preservation method such as drip irrigation , mulching , and xeriscaping . Drip systems which slow drip moisture instantly on the root word system can be purchased at your local home and garden center . Mulches can significantly cool down the root zone and maintain moisture .
Consider adding water - saving gels to the theme zone which will prevail a reserve of water for the plant . These can make a world of difference of opinion specially under stressful conditions . Be certain to travel along recording label directions for their use .
condition : Normal Watering for Outdoor PlantsNormal wateringmeans that soil should be kept equally moist and water regularly , as experimental condition require . Most plants like 1 in of water a week during the rise season , but take care not to over water . The first two twelvemonth after a flora is installed , veritable watering is of import for institution . The first year is critical . It is better to piddle once a hebdomad and body of water deep , than to water system frequently for a few minutes .
Planting
Pruning deciduous shrubs can be divided into 4 groups : Those that requireminimal pruning(take out only dead , diseased , discredited , or crossed branches , can be done in other spring.);spring pruning(encourages vigorous , new growth which bring about summer flowers - in other language , flowers come along on young wood);summer pruning after flower(after flowering , cut back shoot , and take out some of the old growth , down to the ground);suckering habit pruning(flowers appear on wood from old year . Cut back bloom stems by 1/2 , to unassailable growing novel shoot and remove 1/2 of the flowered stems a couple of in from the earth ) Always take away dead , damaged or diseased woodwind first , no matter what type of pruning you are doing .
model : Minimal : Amelanchier , Aronia , Chimonanthus , Clethra , Cornus alternifolia , Daphne , Fothergilla , Hamamelis , Poncirus , Viburnum . springtime : 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 hollow twice the size of the ancestor globe and deep enough to plant at the same grade the shrub was in the container . If soil is misfortunate , dig hole even wider and fill with a mixture half original soil and half compost or soil amendment .
Carefully take shrub from container and gently disjoined root word . Position in midpoint of hole , best side confront forth . Fill in with original soil or an amend mixture if needed as report above . For larger shrub , build a water well . Finish by mulching and water well .
If the plant is ball - and - burlapped , dispatch fasteners and shut down back the top of natural gunny , tucking it down into hole , after you ’ve lay shrub . check that that all gunny is bury so that it wo n’t wick water away from rootball during hot , dry periods . If man-made gunny , take away if possible . If not possible , cut away or make slits to allow for rootage to develop into the fresh soil . For declamatory shrubs , build up a water well . Finish by mulching and water well .
If shrub is bare - root , take care for a discoloration somewhere near the base ; this mark is likely where the filth line was . If soil is too arenaceous or too clayey , add constitutional matter . This will help with both drain and water holding electrical capacity . Fill grunge , tauten just enough to support bush . Finish by mulching and watering well .
Problems
Possible controls : keep weeds down ; use screening in windows to keep them out ; remove infest plant off from non - infested plant life ; use a reflective mulch ( atomic number 13 foil ) under plants ( this repels whitefly ) ; sand trap with white-livered sticky bill of fare , apply label pesticides ; further natural enemies such as epenthetic white Anglo-Saxon Protestant in the garden ; and sometimes a good steady shower of water supply will wash them off the plant . Pest : AphidsAphids are small , soft - bodied , slowly - travel insect that suck in fluid from plant . Aphidscome in many colors , set out from green to Brown University to black , and they may have wings . They attack a wide range of plant coinage causing stunting , deformed leaves and bud . They can transmit harmful plant life viruses with their pierce / sucking mouthparts . Aphids , generally , are only a pain in the neck , since it takes many of them to cause serious flora harm . However aphids do produce a sweet sum called honeydew ( coveted by ant ) which can lead to an untempting black control surface growth called jet mold .
Aphids can increase quickly in number and each female can produce up to 250 live nymphs in the course of a month without conjugation . Aphids often appear when the environment changes - fountain & fall . They ’re often massed at the top of branch feed in on lush tissue paper . Aphids are attracted to the gloss yellow and will often thumb on sensationalistic clothing .
Prevention and Control : Keep weeds to an absolute lower limit , especially around worthy plants . On edibles , wash off off infected area of works . peeress bugs and lacewings will feed on aphids in the garden . There are various products - organic and inorganic - that can be used to control aphids . try the passport of a professional and follow all recording label procedures to a golf tee . Fungi : RustsMostrustsare host specific and overwinter on leaves , stems and spend flower debris . Rust often appear as small-scale , bright orange , sensationalistic , or chocolate-brown pustules on the bottom of leaves . If touched , it will leave a colored spot of spores on the finger . due to fungi and spread by splosh water or rain , rust is worse when weather condition is moist .
Prevention and Control : institute tolerant varieties and provide maximum air circulation . strip up all debris , especially around plants that have had a job . Do not water from disk overhead and water only during the daylight so that plant will have enough time to dry before nighttime . Apply a fungicide labeled for rust on your plant . Fungi : Powdery MildewPowdery Mildewis usually found on flora that do not have enough air circulation or adequate light . trouble are worse where nights are coolheaded and day are tender and humid . The powdery bloodless or gray fungus is usually receive on the upper open of leaves or fruit . Leaves will often plow lily-livered or browned , curl up up , and set down off . New leafage egress crisp and distorted . Fruit will be dwarfed and often degenerate ahead of time .
Prevention and Control : Plant repellent varieties and quad plant properly so they receive adequate light and air circulation . Always water from below , keeping weewee off the foliage . This is paramount for roses . Go easy on the atomic number 7 plant food . enforce antimycotic according to label direction before problem becomes knockout and stick to focusing exactly , not miss any required treatments . Sanitation is a must - clean house up and murder all leaves , flowers , or debris in the fall and demolish . Pest : CaterpillarsCaterpillars are the immature form of moth and butterflies . They are voracious birdfeeder attacking a broad variety of plants . They can be highly destructive and are characterise as leaf feeders , stem borers , leaf roll , cutworms and tent - former .
Prevention and Control : keep pot down , scout individual works and slay caterpillars , apply labeled insecticides such as soaps and rock oil , take vantage of natural enemies such as parasitical wasp in the garden and use Bacillus thuringiensis ( biological war ) for some caterpillar species . Diseases : Pythium and Phytophtora Root RotRot Rot , PythiumorPhytophthoraoccurs when grease moisture story are overly high and fungous spores present in the dirt , add up in contact with the susceptible plant . The base of stems discolor and shrink , and leaves further up the stalk wilt and choke . Leaves near base are affect first . The root will turn black and rot or break . This fungi can be introduced by using unsterilised territory mix or contaminated piddle .
Prevention and ControlRemove affected industrial plant and their origin , and discard surrounding soil . Replace with plants that are not susceptible , and only use refreshed , sterilized grease mix . Hold back on fertilizing too . Try not to over weewee plant and make indisputable that filth is well drained prior to imbed . This fungus is not treatable by chemicals .
Rhizoctonia Root and Stem Rot symptom look alike to Pythium Root Rot , but the Rhizoctonia fungus seems to flourish in well drain soils . pestis : Scale InsectsScales are insects , related to mealy microbe , that can be a trouble on a wide variety of plant - indoor and outdoor . Young scales crawl until they line up a honorable eating site . The adult females then recede their legs and stay on a speckle protected by its hard shell layer . They look as blow , often on the lower incline of leaves . They have pierce backtalk parts that suck the sap out of plant tissue paper . shell can subvert a plant leading to icteric foliage and leaf drop . They also get a mellisonant substance call honeydew ( covet by ants ) which can run to an untempting dark control surface fungal growth called sooty mold .
Prevention and Control : Once established they are intemperate to keep in line . Isolate infested works aside from those that are not overrun . Consult your local garden center professional or Cooperative Extension office in your county for a sound testimonial regarding their ascendance . Encourage natural enemy such as parasitic wasps in the garden . Diseases : BlightBlights are make by fungi or bacteria that kill plant tissue . Symptoms often show up as the rapid detection or wilting of foliage . There are many dissimilar blight , specific to various plant , each requiring a varied method acting of mastery . Pest : LacebugsLacebugsare white to pale brown , 1/8 inch long , rectangular in chassis with have lacy wings and usually found on the underside of leaves where they suck sap . Nymphs may come out spiny and darker than adult . Lacebugs , which do not vanish , are sometimes confused with whitefly that do wing . Damage usually appears as stipples or " " bleached - look " " spots on the leaves . Hard , black excretory product can usually be found on the underside of leaves . Damage is most visible during the summertime , especially on trees . Flowering shrub , though live , appear weak and almost lifeless .
Prevention and Control : If infestation is mild , lave away with a fountain of soapy water or prune aside infested leaves or limbs . Timing is of import : spray agree to the Growing Degree Days ( GDD ) in your area . To control insect , spray underside of leaf with a urge insect powder according to recording label counseling . Conditions : ChlorosisEntire leave of absence or arena around vena in leaves appear yellow . This is the resultant of decreased iron uptake from the soil due to high pH or waterlogged soil . It is of import to bed the pH requirements of plants . Prior to planting , amend territory to ameliorate drain and adapt pH , if necessary . Chlorosis is rough-cut in plants acquire close to concrete or planted in alkaline ground . Treat with an branding iron supplement according to label directions .
Miscellaneous
The most important thing to study is get sufficient water system taken up into the gash stem . deficient piddle can result in wilting and short - lived flower . out to neck opening of blush wine , where the flower head droop , is the result of short water uptake . To maximize H2O uptake , first re - cut the stems at an slant so that the vascular organisation ( the " " plumbing system " " of the stem ) is clear . Next immerse the cut stems in affectionate water .
think when the blossom is edit out , it is cut off from its food provision . Once water is take upkeep of , food is the imagination that will run out next . The plants stems naturally feed the bloom with sugars . If you add a bit of sugar ( 1 tsp . ) to the vase water , this will help oneself feed the flower halt and extend their vase life-time .
Bacteria will work up up in vase water and eventually clot up the stem so the bloom can not take up urine . To prevent this , alter the vase water frequently and make a new cut in the stems every few days .
Floral preservative , available from florists , contain sugars , acids and bacteriacides that can extend cut bloom life . These come in small packets and are generally useable where deletion flowers are sold . If used the right way , these can stretch the vase life of some cut flowers 2 to 3 times when liken with just sheer water in the vase . Glossary : TolerantTolerant refers to a plant ’s ability to bear pic to an external condition(s ) . It does not mean that the flora thrives or prefer this situation , but is capable to conform and continue its life cycle . Glossary : PruningNow is the preferable time to prune this plant .
