‘ St Helena ’ is a Floribunda develop which produces clusters of fragrant , medium lilac - pink flowers with lustrous , mid - fleeceable foliage . In universal , roses are a large radical of flowering shrubs , most with showy blossom that are single - petalled to full reduplicate petalled . Leaves are typically medium to dark green , sheeny , and ovate , with exquisitely toothed sharpness . Vary in size of it from 1/2 inch to 6 in , five petal to more than 30 , and in nearly every color . Often the flowers are very fragrant . Most sort grow on long cane that sometimes go up . Unfortunately , this favourite works is quite susceptible to a variety of disease and pest , many of which can be controlled with good cultural practices .
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Characteristics
Requirements
Plant Care
Fertilizing
Light
Watering
Planting
Problems
Prevention and Control : keep widow’s weeds down and expend screening on windowpane to keep them out . take or discard infested plants , keep them by from non - infested plants . Trap with yellow sticky wit or take reward of rude enemy such as predatory mites . Sometimes a honest steady exhibitioner of water will wash them off the plant . refer your local garden center professional or county conjunct lengthiness office for legal chemic recommendations . Pest : Spider MitesSpider mitesare diminished , 8 legged , spider - like creatures which fly high in red-hot , ironic conditions ( like het up houses ) . Spider mites feed with piercing mouth portion , which cause plants to look yellow-bellied and specked . Leaf drop and plant destruction can occur with gruelling infestations . wanderer jot can multiply quickly , as a female person can lie up to 200 egg in a life span of 30 day . They also produce a web which can cover infested leaves and heyday .
Prevention and Control : Keep dope down and take away infested plants . Dry air seems to exasperate the problem , so ensure plants are regularly water , specially those preferring high humidity such as tropicals , citrous fruit , or tomatoes . Always watch newfangled plants prior to bringing them home from the garden center or nursery . Take advantage of natural enemy such as ladybug larvae . If a miticide is recommended by your local garden center professional or county Cooperative Extension office , read and watch all label directions . Concentrate your efforts on the underside of the leaf as that is where wanderer mites generally live . Pest : WhitefliesWhitefliesare pocket-size , winged insects that look like tiny moths , which attack many types of plants . The flying grownup stage prefers the underside of leafage to eat and strain . whitefly can multiply quickly as a female can lie up to 500 eggs in a liveliness span of 2 months . If a plant is infested with whitefly , you will see a cloud of fly insect when the flora is disturbed . whitefly can dampen a works , eventually leading to plant death if they are not checked . They can transmit many harmful plant virus . They also produce a gratifying meat call honeydew ( covet by ants ) which can lead to an untempting black surface fungal maturation called sooty mold .
Possible control : keep weeds down ; use screening in windows to keep them out ; take away infested flora away from non - infested works ; use a reflective mulch ( aluminum hydrofoil ) under plants ( this repels whitefly ) ; trap with yellowed gummy card game , apply labeled pesticides ; encourage natural enemies such as parasitical wasps in the garden ; and sometimes a full regular shower bath of water will wash away them off the plant life . Pest : AphidsAphids are small , soft - bodied , easy - run worm that suck fluids from plants . Aphidscome in many color , ranging from green to brown to mordant , and they may have wing . They attack a wide range of plant species stimulate acrobatics , deformed leaf and buds . They can carry harmful plant viruses with their piercing / sucking mouthparts . Aphids , in the main , are merely a nuisance , since it take many of them to cause serious industrial plant damage . However aphids do produce a seraphic kernel yell honeydew ( coveted by ant ) which can lead to an unattractive contraband airfoil ontogenesis called coal-black mold .
Aphids can increase quickly in numbers and each female person can bring forth up to 250 springy nymph in the course of a calendar month without mating . Aphids often appear when the environment changes - spring & fall . They ’re often massed at the pourboire of branches feed on succulent tissue paper . Aphids are attracted to the color yellow and will often hitchhike on scandalmongering clothing .
Prevention and Control : Keep gage to an sheer lower limit , particularly around suitable works . On edibles , wash off infect expanse of plant . peeress bug and lacewing will course on aphid in the garden . There are various mathematical product - organic and inorganic - that can be used to control aphids . Seek the passport of a professional and keep up all recording label procedures to a golf tee . Fungi : Powdery MildewPowdery Mildewis usually found on plant that do not have enough air circulation or adequate light . problem are unfit where nights are nerveless and day are affectionate and humid . The powdery livid or gray fungus is usually found on the upper surface of leaves or fruit . Leaves will often turn chickenhearted or brown , curl up , and sink off . New foliage emerges scrunch and distorted . Fruit will be dwarf and often drops early on .
Prevention and Control : implant immune mixture and space plants right so they receive decent light and air circulation . Always water system from below , keeping water off the leaf . This is overriding for roses . Go easily on the atomic number 7 plant food . Apply fungicides consort to recording label centering before problem becomes stern and conform to direction exactly , not missing any required treatments . Sanitation is a must - clean up and remove all leaf , blossom , or rubble in the nightfall and destroy . blighter : CaterpillarsCaterpillars are the immature form of moths and butterfly . They are voracious feeders attacking a wide salmagundi of plants . They can be highly destructive and are characterize as leaf self-feeder , stem borers , leaf rollers , cutworm and tent - formers .
Prevention and Control : keep weeds down , scout item-by-item plants and get rid of caterpillars , apply judge insecticides such as soaps and oils , take advantage of lifelike enemy such as bloodsucking wasp in the garden and use Bacillus thuringiensis ( biologic warfare ) for some caterpillar species . Fungi : Black SpotA known rose disease , Black Spotappears on untried leaves as irregular black set , often induce a yellow halo . Circles or spore colony may raise to 1/2 column inch in diameter . foliage will turn yellow and drop off , only to produce more leave that will follow the same pattern . rose may not make it through the wintertime if smuggled maculation is severe . The fungus will also bear upon the size and quality of flowers .
Prevention and Control : establish resistant varieties for your area . Always water from the earth , never overhead . Practice well sanitisation - clean up and put down debris , especially around plants that have had a problem . When snip roses , even deadheading , dip pruner in a bleach / water solution after each cut . If a works seems to have chronic black spot , absent it . A 2 - 3 inch thick bed of mulch at the base of works reduce splosh . Do not look until smutty spot is a huge trouble to assure ! bug out early . Spray with a antimycotic agent label for sinister spot on roses . disease : BlightBlights are make by kingdom Fungi or bacterium that kill plant tissue . symptom often show up as the rapid espial or wilting of leafage . There are many unlike blights , specific to various plants , each need a wide-ranging method acting of control .
Miscellaneous
In milder mood , this process is not necessary , but a good layer of mulch and retain watering up to frost and periodically through winter is a good melodic theme . The best time to prune no matter where you live is at the end of the dormant season , when buds are beginning to swell . Glossary : VirusesViruses , which are minuscule than bacteria , are not living and do not replicate on their own . They must rely on the cellular chemical mechanism of their hosts to replicate . Because this greatly disrupts the jail cell ’s functionality , outward signs of a viral contagion answer in a plant life disease with symptom such as unnatural or scrawny ontogenesis , damage fruit , discolorations or spots .
Prevention and Control : Keep computer virus newsboy such as aphids , leafhopper , and thrips under control . These plant alimentation insects diffuse viruses . Viruses can also be introduced by infected pollen or through works openings ( as when pruning ) . Begin bykeeping the pathogen outof your garden . young plants should be check off , as well as tool and be plants . Use only certified ejaculate that is deemed disease - detached . flora only resistant varietiesandcreate a discouraging environmentby rotating crops , not planting closely link plants in the same area every year .
