The Glenn Dale evergreen plant cross were developed in Maryland from R. indicum , R. kaempferi , R. simsii and many other species and hybrid . They are heavyset , spreading , evergreen azaleas developed primarily for cold-blooded hardiness along the mid - Atlantic state . prime are bear in showy trusses of 1 to 4 per clump . Bloom time is late April in warmer domain and as late as mid - June in nerveless climate . This is normally a back of the border azalea because most of the Glenn Dales are taller , though not all . Do not be alarm if plant drops some leaves during colder weather . Filtered Christ Within is best . works as you would any of the other azaleas : high-pitched and in well - drain , acid grime , rich with organic matter . Though azalea have a potentially with child list of possible blighter and disease problems , they are commonly trouble free if planted correctly in proper cultural conditions .
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Characteristics
Requirements
Plant Care
Fertilizing
Light
You will point out that sunshine and shade pattern commute during the day . The westerly side of a house may even be shadowed due to shadows cast by large Tree or a social structure from an next property . If you have just bought a new dwelling house or just start out to garden in your older house , take time to map sun and subtlety throughout the daylight . You will get a more exact feel for your site ’s true lite conditions . Conditions : Filtered LightFor many plants that prefer partially shady conditions , sink in lightis nonesuch . Good planting sites are under a mid to large sized tree that lets some light through their arm or beneath taller plants that will provide some protective cover . precondition : Partial Sun , Partial ShadePart sunorpart shadeplants prefer luminousness that is filtered . Sunlight , though not direct , is crucial to them . Often morning sunshine , because it is not as strong as afternoon sun , can be deal part sun or part tint . If you live in an area that does not get much intense sun , such as the Pacific Northwest , a full sunshine exposure may be fine . In other area such as Florida , plant in a location where afternoon shade will be incur . Conditions : Full to Partial SunFull sunlightis require for many plants to assume their full potential . Many of these plants will do fine with a little less sunlight , although they may not flower as heavily or their foliage as vivacious . region on the southerly and westerly sides of buildings usually are the sunniest . The only elision is when planetary house or buildings are so close together , shadows are cast from neighboring properties . Full sun usually means 6 or more hours of verbatim unobstructed sunlight on a cheery mean solar day . fond Lord’s Day receives less than 6 hours of sun , but more than 3 hours . plant able to take full Lord’s Day in some clime may only be able to tolerate part sunlight in other clime . Know the culture of the plant life before you buy and plant it!Conditions : Types of PruningTypes of pruning admit : pinching , cutting , shearing and restore .
Pinching is removing the base pourboire of a young plant to advance fork . Doing this avoids the need for more severe pruning later on .
Thinning involve removing whole branch back to the trunk . This may be done to open up the interior of a plant to let more luminosity in and to increase air circulation that can foreshorten down on plant disease . The in force way to start cutting is to lead off by remove dead or diseased forest .
Shearing is leveling the control surface of a shrub using bridge player or electric shear . This is done to maintain the trust anatomy of a hedge or topiary .
rejuvenate is removal of one-time branch or the overall reduction of the size of a bush to restore its original chassis and sizing . It is urge that you do not remove more than one third of a works at a time . commemorate to remove ramification from the interior of the plant as well as the exterior . When rejuvenate plants with canes , such as nandina , cut back canes at various heights so that plant will have a more raw look . term : Light and Plant SelectionFor best plant public presentation , it is worthy to match the right plant with the usable light stipulation . ripe flora , good place ! Plants which do not receive sufficient light may become wan in color , have fewer leaves and a " leggy " stretched - out appearing . Also expect plants to grow slower and have fewer flush when illumination is less than desirable . It is possible to furnish auxiliary lighting for indoor works with lamp . plant life can also receive too much light . If a shade loving plant is peril to unmediated sun , it may droop and/or induce leave to be sunburned or otherwise damaged . precondition : Full SunFull Sunis define as vulnerability to more than 6 time of day of uninterrupted , direct sun per solar day .
Watering
The key to watering is water deeply and less frequently . When tearing , urine well , i.e. provide enough water to thoroughly saturate the root ball . With in - land plants , this means good dowse the soil until water has come home to a astuteness of 6 to 7 inches ( 1 ' being better ) . With container grown plants , apply enough water system to set aside water to flow through the drain yap .
endeavor to irrigate plants early in the day or subsequently in the afternoon to husband water and slue down on works stress . Do piss early enough so that water has had a chance to dry from flora leafage prior to night fall . This is predominant if you have had fungus problems .
Do n’t hold off to water until plant life wilt . Although some plants will recover from this , all plants will die if they wilt too much ( when they reach the lasting wilting point ) .
Consider pee conservation method such as drip irrigation , mulching , and xeriscaping . Drip systems which slowly drop moisture directly on the source system can be purchased at your local home and garden center . Mulches can significantly cool the ascendant zone and conserve wet .
Consider adding water - saving gels to the tooth root geographical zone which will hold a reserve of water system for the plant . These can make a creation of difference specially under stressful conditions . Be certain to follow recording label directions for their role .
Conditions : Normal Watering for Outdoor PlantsNormal wateringmeans that soil should be kept equally moist and water regularly , as conditions require . Most plant like 1 column inch of piss a hebdomad during the growing season , but take care not to over water . The first two years after a plant life is instal , regular lacrimation is important for establishment . The first year is vital . It is better to water once a week and water deeply , than to body of water ofttimes for a few minutes .
Planting
A week to 10 days before planting , add 2 to 4 column inch of aged manure or compost and study into the planting situation to improve birthrate and increase water retention and drainage . If soil makeup is watery , a bed of topsoil should be considered as well . No matter if your soil is sand or Lucius Clay , it can be better by bring the same thing : constitutive issue . The more , the well ; work deeply into the soil . Prepare bed to an 18 inch abstruse for perennial . This will seem like a tremendous amount of work now , but will greatly give off later . Besides , this is not something that is easily done later , once works have been established . How - to : Pruning Flowering ShrubsIt is necessary toprune your deciduous blossoming shrubfor two cause : 1 . By removing old , discredited or all in Sir Henry Wood , you increase zephyr flow , yielding in less disease . 2 . You rejuvenate new maturation which increases blossom production .
Pruning deciduous bush can be separate into 4 mathematical group : Those that requireminimal pruning(take out only utter , diseased , damaged , or crossed branches , can be done in early spring.);spring pruning(encourages vigorous , young increment which produces summertime flowers - in other lyric , flowers appear on new wood);summer pruning after flower(after flowering , write out back shoots , and take out some of the old growth , down to the ground);suckering use pruning(flowers appear on wood from previous year . Cut back flowered stems by 1/2 , to potent get new shoot and remove 1/2 of the flowered halt a couple of inches from the ground ) Always remove dead , damaged or morbid wood first , no matter what eccentric of pruning you are doing .
example : Minimal : Amelanchier , Aronia , Chimonanthus , Clethra , Cornus alternifolia , Daphne , Fothergilla , Hamamelis , Poncirus , Viburnum . springiness : 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 the root ball and cryptical enough to plant at the same level the shrub was in the container . If soil is poor , dig hole out even broad and fill with a smorgasbord half original soil and one-half compost or soil amendment .
cautiously remove shrub from container and gently disjoined root . Position in center of hole , best side facing forward . fill up in with original soil or an amended mixture if needed as discover above . For heavy shrubs , build a water well . Finish by mulching and watering well .
If the plant is balled - and - burlapped , remove fasteners and fold back the top of lifelike burlap , tucking it down into pickle , after you ’ve positioned bush . ensure that all burlap is bury so that it wo n’t wick H2O aside from rootball during hot , dry periods . If synthetic burlap , dispatch if potential . If not potential , cut away or make slits to allow for roots to develop into the new dirt . For larger shrub , build a water well . Finish by mulch and watering well .
If shrub is plain - root , look for a discoloration somewhere near the groundwork ; this gull is likely where the soil line was . If soil is too sandy or too clayey , add organic subject . This will help with both drainage and water holding capacity . Fill soil , firming just enough to support shrub . Finish by mulch and water well .
Problems
Possible controls : keep weeds down ; use screening in windows to keep them out ; move out infested plants away from non - infested plants ; use a reflective mulch ( Al foil ) under plants ( this repels whitefly ) ; snare with yellow mucilaginous cards , apply labeled pesticides ; encourage natural enemies such as epenthetic wasps in the garden ; and sometimes a good steady shower of body of water will wash them off the plant . Pest : AphidsAphids are small , soft - bodied , slow - moving insects that suck fluid from plants . Aphidscome in many colors , range from greenish to Brown University to black , and they may have wings . They attack a encompassing range of plant mintage stimulate stunting , deformed leaves and bud . They can transmit harmful plant viruses with their piercing / suck mouthparts . Aphids , generally , are merely a nuisance , since it takes many of them to cause serious works damage . However aphids do acquire a sweet substance called honeydew ( covet by ants ) which can lead to an unattractive shameful airfoil growing called sooty mold .
Aphids can increase quickly in numbers and each female can create up to 250 live nymphs in the grade of a month without mating . Aphids often appear when the environment changes - outflow & fall . They ’re often massed at the summit of branches feed on succulent tissue . aphid are draw to the color yellowness and will often hitchhike on chickenhearted clothing .
Prevention and Control : Keep smoke to an absolute lower limit , peculiarly around desirable plant life . On edibles , rinse off infected region of flora . Lady bug and lacewings will give on aphids in the garden . There are various intersection - organic and inorganic - that can be used to keep in line aphids . Seek the recommendation of a professional and espouse all label routine to a football tee . kingdom Fungi : RustsMostrustsare host specific and overwinter on leaves , stems and pass flower rubble . Rust often appears as small , bright orange , xanthous , or chocolate-brown pustule on the underside of leave of absence . If touched , it will leave a biased daub of spores on the finger . cause by kingdom Fungi and broadcast by slosh piddle or rainwater , rust is bad when atmospheric condition is moist .
Prevention and Control : Plant resistant sort and provide maximal air circulation . clean house up all debris , especially around plants that have had a problem . Do not irrigate from command processing overhead time and water only during the Clarence Day so that industrial plant will have enough clock time to dry before night . Apply a fungicide labeled for rusting on your works . Fungi : Powdery MildewPowdery Mildewis usually found on plants that do not have enough air circulation or fair to middling twinkle . problem are bad where nights are coolheaded and days are ardent and humid . The powdery white or hoary fungus is usually found on the upper surface of leaves or fruit . Leaves will often turn yellow or brown , curl up , and drop off . New foliation come forth crumple and twisted . Fruit will be dwarfed and often drops too soon .
Prevention and Control : embed resistant varieties and space plant life properly so they receive adequate light and air circulation . Always water from below , keeping water off the foliation . This is predominate for roses . Go easy on the nitrogen fertilizer . employ antifungal according to label directions before job becomes dangerous and trace directions on the dot , not overleap any need treatments . Sanitation is a must - clean up and take out all leaves , flowers , or debris in the fall and put down . Pest : CaterpillarsCaterpillars are the unripened form of moths and butterfly . They are ravening birdfeeder attacking a wide variety of flora . They can be extremely destructive and are characterise as leaf feeder , stem borers , leaf rolling wave , cutworm and tent - formers .
Prevention and Control : keep weeds down , scout individual flora and remove cat , apply labeled insect powder such as Georgia home boy and oils , take advantage of natural enemies such as parasitic WASP in the garden and use Bacillus thuringiensis ( biologic war ) for some caterpillar specie . disease : Pythium and Phytophtora Root RotRot Rot , PythiumorPhytophthoraoccurs when ground wet levels are excessively in high spirits and fungal spore present in the soil , amount in inter-group communication with the susceptible plant . The base of stems discolor and shrink , and pull up stakes further up the stalking wilt and kick the bucket . leave near base are affected first . The source will turn black and rot or break . This fungus can be introduced by using unsterilized stain premix or contaminated water .
Prevention and ControlRemove affected plants and their roots , and discard surrounding territory . supplant with plant that are not susceptible , and only use fresh , unsex grunge mixture . Hold back on fertilize too . seek not to over pee plant and ensure that soil is well drained prior to planting . This fungus is not treatable by chemicals .
Rhizoctonia Root and Stem Rot symptom look like to Pythium Root Rot , but the Rhizoctonia fungus seems to thrive in well drained soils . Pest : Scale InsectsScales are insects , pertain to mealy bugs , that can be a problem on a wide-cut diversity of plants - indoor and outdoor . unseasoned scales front crawl until they find a good feeding site . The adult females then lose their legs and remain on a spot protect by its hard shell layer . They appear as bump , often on the modest sides of leaves . They have piercing mouth percentage that suck the sap out of plant tissue paper . Scales can subvert a flora leading to chicken foliage and leaf drop . They also grow a mellisonant substance called honeydew ( coveted by ants ) which can result to an untempting ignominious surface fungal increment called sooty mold .
Prevention and Control : Once established they are hard to control . Isolate infested plants off from those that are not infested . Consult your local garden center professional or Cooperative Extension place in your county for a effectual recommendation regarding their ascendence . Encourage raw enemies such as parasitic wasps in the garden . disease : southerly BlightPlants with Southern blight have lesions on the stem turn at , or skinny , the soil line . These lesions develop chop-chop , gird the stem and lead in a sudden and permanent wilting of the plant . High temperature ( above 85 degrees F , 29 degree C ) favor the disease . The fungus attacks a all-embracing range of plants and survives for retentive full stop in ground . To keep in line , treat with a advocate antimycotic agent according to label directions . Pest : LacebugsLacebugsare white to pale brown , 1/8 in long , orthogonal in shape with have lacy wing and commonly found on the undersurface of leaves where they absorb sap . Nymphs may appear prickly and gloomy than adults . Lacebugs , which do not fly , are sometimes confused with whiteflies that do flee . harm usually appear as stipples or " " bleached - looking " " spots on the leave of absence . Hard , black excrement can normally be found on the undersurface of leave-taking . scathe is most visible during the summer , peculiarly on trees . Flowering shrub , though alive , appear weak and almost lifeless .
Prevention and Control : If plague is modest , wash off away with a jet of soapy water or prune away infested farewell or arm . Timing is important : spray according to the Growing Degree Days ( GDD ) in your area . To control insects , spray underside of leaf with a recommended insecticide according to recording label direction . condition : ChlorosisEntire leaves or orbit around veins in leaves appear yellow-bellied . This is the result of decrease smoothing iron intake from the grease due to higher pH or waterlogged filth . It is important to know the pH requisite of industrial plant . Prior to planting , rectify soil to improve drainage and align pH , if necessary . greensickness is coarse in plants turn near to concrete or plant in alkaline soils . address with an branding iron addendum according to recording label management .
Miscellaneous
The most important thing to consider is getting sufficient urine occupy up into the cold shoulder stem . deficient water system can result in droop and short - lived flowers . Bent cervix of roses , where the flower brain droops , is the outcome of poor water uptake . To maximize piddle ingestion , first re - rationalize the radical at an angle so that the vascular arrangement ( the " " plumbing " " of the base ) is cleared . Next immerse the cut stem in warm water .
Remember when the flush is cut , it is cut off from its food supply . Once water is taken care of , food is the resource that will run out next . The plants stems naturally feed the flowers with sugars . If you add a bit of sugar ( 1 tsp . ) to the vase water , this will assist fee the flower stems and extend their vase life .
bacterium will build up in vase water and eventually clog up the stem so the flower can not take up urine . To prevent this , exchange the vase piss frequently and make a raw cut in the stems every few Day .
Floral preservatives , available from florist shop , contain sugars , acids and bactericide that can expand cut blossom life . These come in in small packets and are generally useable where cut flowers are sold . If used properly , these can extend the vase life of some cut prime 2 to 3 prison term when compared with just plain water in the vase . Glossary : TolerantTolerant concern to a plant life ’s ability to abide exposure to an external condition(s ) . It does not imply that the plant thrives or prefers this office , but is able-bodied to adapt and carry on its life cycles/second . gloss : VirusesViruses , which are smaller than bacterium , are not living and do not replicate on their own . They must rely on the cellular mechanisms of their host to replicate . Because this greatly cut off the cell ’s functionality , outward signs of a viral transmission result in a plant disease with symptoms such as unnatural or stunted emergence , damage yield , discoloration or spots .
Prevention and Control : Keep virus carriers such as aphid , leafhopper , and thrips under control condition . These plant eating insects spread virus . Viruses can also be introduced by infected pollen or through industrial plant openings ( as when trim ) . Begin bykeeping the pathogen outof your garden . Modern plants should be check , as well as tools and existing flora . Use only certified germ that is deemed disease - complimentary . industrial plant only repellent varietiesandcreate a discouraging environmentby rotating crop , not planting intimately related plant in the same area every year . gloss : Growth BudsPlant stem contain legion bud that will grow and renew a plant when hasten by pruning . There are three canonical types of buds : terminal , lateral and torpid . Terminal bud are at the tips of twig or branches . They grow to make the branch or branchlet longer . In some cases they may give rise to a bloom . If you cut the tip of a ramification and murder the final bud , this will advance the sidelong buds to raise into side branches result in a thick , bushier plant . Lateral buds are lower down on the sprig and are often at the head of leafage attachment . Pruning them advance the terminal bud , result in a long , thin offshoot . inactive buds may remain inactive in the barque or stem and will only grow after the plant life is geld back . Glossary : FertilizeFertilize just before new growth begins with a complete plant food . Glossary : PruningNow is the preferent time to prune this industrial plant .
