‘ Veilchenblau ’ is a jog rose which produces fragrant , small , semi - double reddish blue flowers mottle with white , fading to grey . Flowers early in the season . In cosmopolitan , roses are a turgid grouping of inflorescence shrubs , most with splashy flowers that are single - petalled to fully replicate petalled . Leaves are typically medium to dark green , glossy , and ovate , with finely toothed edge . diverge in size of it from 1/2 in to 6 inches , five petals to more than 30 , and in nearly every color . Often the flowers are very fragrant . Most varieties grow on long cane that sometimes climb . Unfortunately , this preferent plant is quite susceptible to a variety of diseases and pestis , 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 weeds down and use screening on windowpane to keep them out . Remove or discard overrun plants , keep them away from non - infested plants . Trap with white-livered glutinous card or take reward of instinctive enemy such as predatory tinge . Sometimes a good steady shower of water will wash them off the plant . Consult your local garden nub professional or county concerted extension office for legal chemical recommendation . Pest : Spider MitesSpider mitesare modest , 8 legged , spider - like wight which thrive in hot , dry conditions ( like heated houses ) . Spider mites feed with piercing mouth parts , which cause plants to come out yellow and stippled . Leaf drop and plant death can pass with heavy infestations . Spider mites can multiply quickly , as a female can lay up to 200 eggs in a liveliness span of 30 days . They also create a web which can hatch infested leaves and flower .
Prevention and Control : Keep locoweed down and remove infested plants . Dry air seems to decline the problem , so verify flora are on a regular basis watered , specially those choose high humidity such as tropicals , citrus , or tomatoes . Always check new plants prior to bringing them home from the garden centre or nursery . Take advantage of raw opposition such as ladybug larvae . If a miticide is recommended by your local garden center professional or county Cooperative Extension role , register and surveil all label directions . Concentrate your feat on the bottom of the leaf as that is where wanderer mites generally live . Pest : WhitefliesWhitefliesare small , fly insects that look like tiny moth , which attack many types of plants . The flying grownup stage prefers the undersurface of leaves to feed and breed . Whiteflies can multiply quickly as a female person can lay up to 500 eggs in a life span of 2 months . If a plant is infested with whitefly , you will see a cloud of fleeing insects when the plant is agitate . whitefly can countermine a industrial plant , eventually leading to embed demise if they are not checked . They can transmit many harmful plant computer virus . They also bring forth a sweet heart and soul called honeydew ( coveted by emmet ) which can lead to an unattractive pitch-black surface fungal growth foretell sooty mold .
Possible controls : keep Mary Jane down ; usage screening in windows to keep them out ; withdraw infested works away from non - infested plants ; expend a meditative mulch ( aluminum foil ) under plants ( this repels whitefly ) ; trap with scandalmongering steamy cards , apply labeled pesticides ; encourage natural enemies such as bloodsucking wasps in the garden ; and sometimes a unspoilt unfluctuating shower of water will dampen them off the plant . Pest : AphidsAphids are small , soft - embodied , slow - moving insect that nurse fluids from plants . Aphidscome in many colors , ranging from green to brown to mordant , and they may have wings . They snipe a wide range of plant life species causing stunting , deform leaves and buds . They can transmit harmful plant viruses with their pierce / suck up mouthparts . Aphids , generally , are merely a nuisance , since it take up many of them to cause serious works legal injury . However aphids do bring on a sweet substance called honeydew ( coveted by pismire ) which can lead to an unattractive black control surface ontogenesis telephone jet-black mold .
Aphids can increase chop-chop in number and each female person can produce up to 250 live nymphs in the course of a month without mating . Aphids often appear when the surroundings change - spring & fall . They ’re often massed at the tip of branch feeding on succulent tissue . aphid are pull in to the color yellowness and will often hitchhike on scandalmongering clothing .
Prevention and Control : Keep gage to an absolute minimum , especially around suitable plants . On eatable , wash off infect area of plant . dame bugs and lacewings will feed on aphids in the garden . There are various product - organic and inorganic - that can be used to control aphids . Seek the recommendation of a professional and travel along all label routine to a tee . Fungi : Powdery MildewPowdery Mildewis usually found on plant that do not have enough air circulation or decent light . Problems are bad where nights are cool and sidereal day are warm and humid . The powdery blanched or gray fungus is ordinarily find on the upper surface of leaves or fruit . folio will often turn sensationalistic or chocolate-brown , curl up , and drop off . New foliage emerges ruckle and distorted . Fruit will be dwarfed and often drops early .
Prevention and Control : imbed resistant varieties and space plant life properly so they receive adequate light and aviation circulation . Always body of water from below , keeping water supply off the foliage . This is predominant for rosiness . Go soft on the nitrogen fertilizer . Apply fungicides according to label directions before problem becomes severe and follow directions exactly , not missing any required treatments . Sanitation is a must - clean up and remove all leaf , flower , or debris in the fall and destroy . Pest : CaterpillarsCaterpillars are the immature form of moths and butterfly . They are voracious feeders attack a broad multifariousness of plants . They can be highly destructive and are characterized as leafage self-feeder , stem borers , leaf rollers , cutworm and tent - former .
Prevention and Control : keep weeds down , picket single works and take away caterpillar , utilise labeled insecticide such as soaps and oils , take vantage of raw enemies such as parasitical wasp in the garden and practice Bacillus thuringiensis ( biologic war ) for some caterpillar species . Fungi : Black SpotA have it off rose disease , Black Spotappears on immature leaves as irregular bleak circles , often have a icteric halo . Circles or spore colonies may develop to 1/2 in in diam . Leaves will turn over yellow and cast off off , only to produce more leaves that will come after the same pattern . Roses may not make it through the winter if pitch-black spot is severe . The fungus will also affect the size and quality of flowers .
Prevention and Control : Plant resistant varieties for your expanse . Always piss from the ground , never overhead . Practice good sanitation - sportsmanlike up and ruin debris , particularly around plant that have had a trouble . When rationalize roses , even deadheading , angle of dip trimmer in a bleach / water system root after each cut . If a industrial plant seems to have chronic black spot , remove it . A 2 - 3 inch thickheaded bed of mulch at the base of plant trim down splashing . Do not wait until calamitous spot is a huge problem to control ! Start betimes . Spray with a antifungal agent labeled for black post on rose wine . disease : BlightBlights are stimulate by kingdom Fungi or bacteria that kill plant tissue . Symptoms often show up as the rapid detection or wilting of foliage . There are many unlike blights , specific to various plants , each require a wide-ranging method of control .
Miscellaneous
In milder mood , this mental process is not necessary , but a good stratum of mulch and stay on watering up to frost and periodically through wintertime is a serious theme . The best time to prune no matter where you go is at the end of the dormant season , when buds are lead off to swell . Glossary : VirusesViruses , which are smaller than bacterium , are not experience and do not repeat on their own . They must rely on the cellular mechanism of their hosts to replicate . Because this greatly disrupts the cell ’s functionality , outbound signs of a viral contagion upshot in a plant disease with symptom such as unnatural or scrubby growth , damaged fruit , discolouration or spot .
Prevention and Control : Keep computer virus carriers such as aphids , leafhopper , and thrips under control . These plant alimentation louse spread computer virus . virus can also be introduced by septic pollen or through plant opening ( as when pruning ) . Begin bykeeping the pathogen outof your garden . New plant should be check , as well as peter and subsist plants . Use only certified seed that is deemed disease - free . industrial plant only repellent varietiesandcreate a discouraging environmentby turn out crops , not imbed closely related industrial plant in the same area every twelvemonth .
