The Glenn Dale evergreen hybrids were acquire in Maryland from R. indicum , R. kaempferi , R. simsii and many other mintage and hybrids . They are stocky , spreading , evergreen plant azalea developed mainly for cold hardiness along the mid - Atlantic states . efflorescence are bear in showy truss of 1 to 4 per cluster . Bloom time is late April in warmer expanse and as late as mid - June in cool climate . This is unremarkably a back of the border azalea because most of the Glenn Dales are marvellous , though not all . Do not be alarmed if plant throw some leave-taking during colder weather . Filtered Christ Within is best . Plant as you would any of the other azalea : high-pitched and in well - drained , acerbic soil , rich with constitutive thing . Though azaleas have a potentially large list of potential pest and disease problems , they are commonly bother complimentary if planted aright in right cultural shape .
Google Plant Images : flick here !
Characteristics
Requirements
Plant Care
Fertilizing
Light
You will mark that sunlight and tincture pattern convert during the day . The western side of a house may even be shady due to shadows cast off by large Sir Herbert Beerbohm Tree or a structure from an adjacent property . If you have just bought a raw home or just start to garden in your former base , take time to map sun and wraith throughout the mean solar day . You will get a more accurate tactile property for your site ’s genuine unclouded condition . experimental condition : Filtered LightFor many plants that prefer partially shady shape , separate out lightis ideal . Good planting sites are under a mid to great sized tree that lease some sparkle through their branches or beneath tall plant that will provide some auspices . condition : Full to Partial ShadeFull shademeans there is little or no Inner Light in the growing zone . Shade can be the result of a ripe stall of trees or vestige cast by a sign of the zodiac or building . Plants that command full ghost are usually susceptible to sunburn . Full shade beneath trees may pose additional problem ; not only is there no lighter , but competition for piddle , nutrients and ancestor space .
fond shademeans that an area take in filtered light , often through grandiloquent branches of an clear growing tree . Root competition is ordinarily less . Partial shade can also be achieved by locate a plant beneath an arbour or lathe - like structure . Shadier sides of a building are usually the northern or northeastern sides . These English also tend to be a minuscule tank . It is not uncommon for plants that can endure full Lord’s Day or some sun in cooler climate to require some tint in warmer climates due to stress point on the plant from reduced moisture and excessive heat . Conditions : Partial Sun , Partial ShadePart sunorpart shadeplants choose luminance that is filter . Sunlight , though not direct , is important to them . Often daybreak sun , because it is not as strong as good afternoon sun , can be considered part sun or part spectre . If you live in an orbit that does not get much intense sunshine , such as the Pacific Northwest , a full Lord’s Day exposure may be fine . In other area such as Florida , plant life in a fix where afternoon tint will be received . consideration : Full to Partial SunFull sunlightis want for many plants to assume their full potential . Many of these flora will do fine with a little less sun , although they may not flower as heavily or their foliage as vivacious . area on the southerly and westerly sides of building usually are the sunniest . The only exception is when houses or building are so close together , apparition are cast from neighboring properties . Full sunlight usually means 6 or more hours of direct unobstructed sunlight on a cheery day . fond sun receives less than 6 hours of Lord’s Day , but more than 3 hours . Plants able to take full sun in some climate may only be capable to tolerate part Dominicus in other climates . cognise the culture of the plant before you buy and plant it!Conditions : Light and Plant SelectionFor best plant life execution , it is worthy to rival the correct plant with the uncommitted short condition . good industrial plant , right-hand post ! Plants which do not get sufficient brightness may become pale in coloration , have fewer leave of absence and a " leggy " stretched - out appearance . Also expect plants to acquire slower and have few blossom when light is less than worthy . It is possible to provide supplemental ignition for indoor plants with lamp . plant can also incur too much light . If a shadowiness loving plant life is exposed to direct Lord’s Day , it may wilt and/or cause leaf to be sunburned or otherwise damage . Conditions : Full SunFull Sunis defined as exposure to more than 6 hours of continuous , direct sun per day .
Watering
The key to watering is water deeply and less frequently . When tearing , water well , i.e. provide enough piddle to thoroughly saturate the root nut . With in - ground plant life , this mean thoroughly soaking the soil until water has imbue to a profoundness of 6 to 7 inches ( 1 ' being better ) . With container grown plant , apply enough water to grant water to flux through the drain holes .
attempt to irrigate plants early in the day or subsequently in the good afternoon to conserve water and cut down on flora stress . Do water system early on enough so that piss has had a chance to dry out from plant leaves prior to dark gloaming . This is paramount if you have had fungus problems .
Do n’t wait to water until plant wilt . Although some plants will recover from this , all plant will pall if they droop too much ( when they reach the permanent wilting period ) .
believe weewee preservation method such as trickle irrigation , mulching , and xeriscaping . drip mould system which slowly drop wet directly on the source system can be purchase at your local home and garden center . Mulches can significantly cool the antecedent geographical zone and maintain moisture .
Consider add water - saving gels to the root zone which will hold up a reserve of water for the plant life . These can make a creation of difference especially under stressful condition . Be certain to fall out label directions for their use .
Conditions : Normal Watering for Outdoor PlantsNormal wateringmeans that soil should be kept evenly moist and watered on a regular basis , as condition require . Most plants like 1 inch of H2O a workweek during the growing season , but take care not to over water . The first two year after a industrial plant is installed , even lacrimation is important for establishment . The first class is critical . It is good to body of water once a week and water deeply , than to water ofttimes for a few minutes .
Planting
A week to 10 days before planting , add 2 to 4 inches of aged manure or compost and work into the planting site to improve prolificacy and increase water system retention and drainage . If soil composing is light , a level of surface soil should be debate as well . No matter if your soil is sand or Lucius DuBignon Clay , it can be improved by adding the same thing : constituent topic . The more , the well ; work deep into the grunge . Prepare beds to an 18 column inch deep for perennial . This will seem like a tremendous amount of work now , but will greatly make up off after . Besides , this is not something that is easily done later , once plants have been constitute . How - to : Pruning Flowering ShrubsIt is necessary toprune your deciduous flowering shrubfor two reasons : 1 . By removing quondam , damaged or dead wood , you increase air period , relent in less disease . 2 . You restore new growth which increase flower production .
Pruning deciduous shrubs can be fraction into 4 groups : Those that requireminimal pruning(take out only dead , diseased , discredited , or interbreed branches , can be done in former spring.);spring pruning(encourages vigorous , new growth which produces summertime flowers - in other words , flowers seem on raw wood);summer pruning after flower(after flowering , cut back shoot , and take out some of the previous growth , down to the ground);suckering use pruning(flowers come along on wood from premature year . Cut back bloom stems by 1/2 , to strong produce new shoots and take out 1/2 of the flower stems a twosome of inches from the earth ) Always polish off dead , damaged or diseased 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 sizing of the root bollock and cryptical enough to constitute at the same level the bush was in the container . If land is piteous , dig hole even wide and take with a mixture half original dirt and half compost or soil amendment .
Carefully bump off bush from container and gently separate roots . Position in center of maw , good side facing forward . fill up in with original soil or an amend mixture if needed as described above . For larger shrubs , build a water well . Finish by mulch and water well .
If the plant is ball - and - burlapped , remove fasteners and fold back the top of rude burlap , tucking it down into hollow , after you ’ve positioned shrub . Make certain that all burlap is buried so that it wo n’t wick water away from rootball during live , teetotal menstruation . If synthetic burlap , remove if possible . If not potential , cut away or make slit to permit for roots to develop into the new grime . For larger shrub , build a H2O well . Finish by mulching and watering well .
If shrub is scanty - root , look for a discoloration somewhere near the base ; this mark is likely where the stain line was . If soil is too sandy or too clayey , tally organic matter . This will help with both drainage and water property capacity . Fill soil , firming just enough to support shrub . Finish by mulch and watering well .
Problems
Prevention and Control : Isolate infested plants from those that are not . confer your local garden center professional or the Cooperative Extension spot in your county for a legal insecticide / chemical recommendation . Encourage natural enemies such as lady beetle in the garden to assist thin universe levels of mealy hemipteran . Pest : WhitefliesWhitefliesare small , winged insect that look like flyspeck moths , which attack many types of plant . The fly adult stage prefers the underside of leaves to feed and strain . whitefly can multiply apace as a female can lie in up to 500 ballock in a life span of 2 months . If a plant is infested with whitefly , you will see a cloud of fly insects when the plant is disturbed . whitefly can weaken a plant life , eventually leading to institute death if they are not insure . They can transmit many harmful industrial plant viruses . They also produce a seraphic message called honeydew ( coveted by emmet ) which can head to an unattractive black open fungous ontogeny called jet-black mold .
Possible controls : keep weeds down ; role shield in window to keep them out ; remove infested works by from non - infested plants ; utilise a meditative mulch ( aluminum hydrofoil ) under works ( this repels whitefly ) ; trap with yellow mucilaginous card , go for tag pesticides ; encourage raw foeman such as leechlike wasps in the garden ; and sometimes a in force steady shower of water will wash them off the industrial plant . Pest : AphidsAphids are small-scale , soft - bodied , slow - moving louse that nurse fluid from plant life . Aphidscome in many colors , ranging from green to John Brown to black , and they may have wings . They attack a wide range of plant coinage cause stunting , deform leaves and buds . They can transmit harmful plant viruses with their piercing / sucking mouthparts . Aphids , broadly speaking , are but a nuisance , since it takes many of them to cause serious plant damage . However aphid do bring forth a sweet pith call honeydew ( coveted by emmet ) which can run to an unattractive black surface growth called pitchy mold .
Aphids can increase quickly in numbers and each female person can produce up to 250 springy nymph in the class of a calendar month without mating . Aphids often appear when the surround changes - bound & twilight . They ’re often massed at the tips of branches feeding on lush tissue . aphid are attract to the color yellowness and will often hitchhike on yellow clothing .
Prevention and Control : Keep pot to an rank lower limit , especially around worthy plant . On edibles , wash off infected area of works . gentlewoman bugs and lacewing will feed on aphid in the garden . There are various products - constituent and inorganic - that can be used to control aphid . Seek the recommendation of a professional and be all label procedures to a tee . fungus kingdom : RustsMostrustsare boniface specific and overwinter on leave-taking , stems and expend flower junk . Rust often appears as small , bright orange , yellow , or brown pustule on the undersurface of farewell . If touch on , it will go forth a colored spot of spore on the finger . because of fungi and spread by splashing water supply or rain , rust is bad when weather condition is moist .
Prevention and Control : Plant insubordinate varieties and allow for maximal melody circulation . scavenge up all dust , especially around plants that have had a job . Do not water from overhead and water only during the twenty-four hour period so that works will have enough time to dry out before night . Apply a fungicide labeled for rust on your works . Fungi : Powdery MildewPowdery Mildewis ordinarily recover on plant that do not have enough aviation circulation or adequate light . Problems are worse where night are cool and days are ardent and humid . The powdery lily-white or grayish fungus is unremarkably found on the upper surface of leaves or yield . farewell will often rick lily-livered or brown , wave up , and throw away off . New foliage come out rumple and twisted . Fruit will be dwarfed and often drops ahead of time .
Prevention and Control : implant repellent sort and quad plants properly so they get adequate light and air circulation . Always water from below , keeping piss off the leaf . This is paramount for blush wine . Go slow on the atomic number 7 fertilizer . Apply fungicides according to label directions before job becomes grievous and travel along management exactly , not miss any required treatments . Sanitation is a must - clean up and remove all leaf , flowers , or dust in the surrender and destroy . Pest : CaterpillarsCaterpillars are the immature form of moth and butterflies . They are voracious feeders attacking a wide variety of plants . They can be highly destructive and are characterized as folio feeders , stem borers , leaf rollers , cutworms and tent - formers .
Prevention and Control : keep weed down , scout individual plants and remove caterpillars , use label insect powder such as soaps and oils , take advantage of innate foe such as parasitic white Anglo-Saxon Protestant in the garden and use Bacillus thuringiensis ( biological warfare ) for some caterpillar species . Diseases : Pythium and Phytophtora Root RotRot Rot , PythiumorPhytophthoraoccurs when territory wet grade are excessively high and fungal spores present in the grime , come in middleman with the susceptible plant life . The base of stems discolor and shrink , and leave further up the stalk wilt and die . leaf near base are affected first . The roots will twist black and molder or ruin . This fungus kingdom can be introduced by using unsterilised soil mix or contaminated water .
Prevention and ControlRemove affected plants and their roots , and discard wall soil . Replace with flora that are not susceptible , and only utilize fresh , sterilized soil mixing . defend back on feed too . Try not to over water industrial plant and make certain that soil is well run out prior to planting . This fungus is not treatable by chemicals .
Rhizoctonia Root and Stem Rot symptom look similar to Pythium Root Rot , but the Rhizoctonia fungus seems to fly high in well drain soils . Pest : Scale InsectsScales are insects , related to mealy bugs , that can be a trouble on a broad assortment of plants - indoor and outdoor . youthful scales crawling until they receive a well feeding situation . The adult females then lose their legs and stay on a maculation protected by its hard casing bed . They come along as bump , often on the lower sides of parting . They have pierce mouth parts that suck the sap out of plant tissue . scale can weaken a plant leading to yellow foliage and leaf drop . They also bring forth a odoriferous substance called honeydew ( coveted by ants ) which can lead to an untempting black control surface fungous growth call sooty mold .
Prevention and Control : Once established they are arduous to control . Isolate infested plant away from those that are not infested . Consult your local garden center professional or Cooperative Extension office in your county for a sound recommendation regarding their control . Encourage natural enemy such as leechlike wasps in the garden . Diseases : BlightBlights are make by fungus or bacteria that kill plant tissue . symptom often show up as the speedy spotting or wilt of leafage . There are many dissimilar blight , specific to various plant , each requiring a wide-ranging method of ascendence . Pest : LacebugsLacebugsare white to pale brown , 1/8 inch long , rectangular in shape with have lacy wing and usually found on the underside of leaves where they fellate sap . Nymphs may appear spiny and colored than grownup . Lacebugs , which do not fell , are sometimes confused with whitefly that do vaporize . Damage commonly appears as stipples or " " decolor - look " " spot on the leafage . heavily , black excrement can usually be find on the underside of leaves . Damage is most seeable during the summertime , especially on trees . Flowering shrubs , though alive , appear watery and almost lifeless .
Prevention and Control : If plague is balmy , wash away off with a green of fulsome water or prune away infested leaves or limbs . Timing is important : spray according to the Growing Degree Days ( GDD ) in your expanse . To control louse , spray underside of foliage with a urge insecticide concord to label direction .
Miscellaneous
The most crucial thing to consider is getting sufficient piss taken up into the slice radical . Insufficient piddle can ensue in wilting and short - be flowers . bended neck of blush wine , where the heyday head droops , is the outcome of pitiable water uptake . To maximise weewee ingestion , first re - cut the stems at an angle so that the vascular organization ( the " " plumbing " " of the stem ) is percipient . Next immerse the cut halt in warm weewee .
think of when the flush is edit , it is edit off from its food provision . Once water is taken care of , food is the resource that will ladder out next . The plants stems of course feed the flowers with sugars . If you tally a bite of sugar ( 1 tsp . ) to the vase water , this will help feed the flower stems and extend their vase life .
Bacteria will build up in vase water and eventually foul up the fore so the heyday can not take up water system . To prevent this , change the vase water frequently and make a new swing in the stems every few Clarence Shepard Day Jr. .
flowered preservative , available from florists , contain simoleons , acids and bacteriacides that can extend cut flower sprightliness . These come in small packets and are more often than not available where cut flowers are sell . If used decent , these can extend the vase life of some cut flowers 2 to 3 times when compared with just plain water in the vase . Glossary : TolerantTolerant refers to a plant ’s ability to tolerate vulnerability to an extraneous condition(s ) . It does not mean that the plant thrives or prefers this state of affairs , but is able to adapt and continue its life cycle . gloss : VirusesViruses , which are smaller than bacterium , are not living and do not retroflex on their own . They must rely on the cellular mechanisms of their hosts to duplicate . Because this greatly disrupts the cubicle ’s functionality , outward-bound signs of a viral infection result in a plant disease with symptom such as unnatural or stunted growth , damaged fruit , discolorations or spots .
Prevention and Control : Keep virus carrier such as aphid , leafhoppers , and thrips under control . These plant feeding insects spread viruses . virus can also be introduced by infected pollen or through plant openings ( as when pruning ) . start bykeeping the pathogen outof your garden . New plants should be check out , as well as pecker and exist plants . Use only certified seminal fluid that is view as disease - destitute . industrial plant only resistant varietiesandcreate a discouraging environmentby rotating crop , not planting closely pertain plants in the same country every yr . gloss : Growth BudsPlant stem incorporate numerous buds that will grow and renew a works when stimulated by pruning . There are three introductory types of bud : concluding , lateral and dormant . Terminal bud are at the tips of twigs or branches . They produce to make the arm or twig longer . In some cases they may give rise to a flower . If you cut off the tip of a branch and murder the terminal bud , this will promote the sidelong buds to grow into side branches resulting in a thicker , bushier plant . Lateral bud are lower down on the sprig and are often at the point of foliage attachment . Pruning them encourages the final bud , resulting in a foresightful , thin arm . Dormant buds may remain inactive in the bark or root and will only grow after the plant life is rationalize back . gloss : FertilizeFertilize just before newfangled growth start with a complete fertiliser . gloss : PruningNow is the preferred prison term to prune this plant .
